9 Best Group 27 Battery Reviews

You’re planning a weekend on the water or a long RV trip, and the last thing you want is a battery that leaves you stranded. Group 27 batteries come in many flavors—AGM, lithium, flooded—each with different strengths for starting engines, powering electronics, or handling deep discharges. With so many choices, picking the right one can feel overwhelming.

This guide breaks down the nine best group 27 batteries on the market, comparing their performance, durability, and ideal use cases. Whether you need massive cold cranking amps for a cold start or a long-lasting deep-cycle companion for your solar setup, you’ll find clear recommendations to make a confident purchase.

WEIZE Dual Purpose AGM Battery Group 27M – Reliable Power for Marine & RV

The WEIZE Group 27M is a dual-purpose AGM battery that excels in both starting and deep-cycle roles. Built with advanced AGM technology, it delivers 580 CCA for reliable engine starts and 92Ah capacity for sustained power to your trolling motor or RV accessories. Its low internal resistance means higher output and faster charging—up to five times quicker than traditional flooded batteries, so you spend less time waiting and more time enjoying the water or the road.

With 20 times more vibration resistance than flooded alternatives, this battery handles rough marine conditions and uneven terrain without spilling or degrading. The maintenance-free design eliminates the need to check water levels, and the sealed construction reduces corrosion on terminals. If you want a battery that balances starting power with deep-cycle endurance and minimal upkeep, the WEIZE is a strong contender.

View all product features

• [High Performance]: Powered by advanced AGM technology, the WEIZE BCI Group 27M has a low internal resistance and high output power, offering a reliable power supply and a long battery life, 2x more cycle life than traditional flooded marine batteries. [DUAL PURPOSE ]: The WEIZE BCI Group 27M is a dual purpose deep cycle sealed AGM marine and RV battery. It features an outstanding starting power and deep cycling capability for long-lasting power supply.Terminal： Left : Positive (+)-Red, Right: Negative (-)-Black.
• [Dual Purpose ]: The WEIZE BCI Group 27M is a dual purpose deep cycle sealed AGM marine and RV battery. It features an outstanding starting power and deep cycling capability for long-lasting power supply.
• [Quick Charge]: The WEIZE BCI Group 27M features quick charging, which allows it to charge up to five times faster, saving time and increasing efficiency. Please use a constant voltage of 14.4± 0.1V and a max current of 18.4A to charge the battery until the current has no change for 2 to 3 hours， But the maximum charging time must not exceed 24 hours.
• [Low Maintenance]: Being almost maintenance-free, the WEIZE BCI Group 27M reduces surface corrosion, proves more durable, and performs well against vibrations, has 20x more vibration resistance than flooded batteries.
• [Safety & Service ]: With a leak proof design and the presence of specialized valves, the WEIZE BCI Group 27M battery is very safe to use, ensuring a longer battery life. WEIZE dual-purpose Batteries are confidently guaranteed for 2 years! We aim for quality followed up with quality customer service.

---

Mighty Max Battery MM-G27M – Strong Starting Power for Marine Applications

The Mighty Max MM-G27M is a dual-purpose AGM battery engineered for marine environments where high cranking amps are crucial. With 800 CCA and 850 MCA, this battery fires up even large outboards and inboards quickly, while its 100Ah deep-cycle capacity keeps your fish finder, navigation lights, and radio running for hours. The spill-proof, maintenance-free design means no acid leaks or water refills, so you can install it and forget about it.

This battery shines when you need instant starting reliability in any climate, from hot summer days to chilly spring mornings. Its 170-minute reserve capacity provides a generous buffer if your alternator fails. While it’s not the lightest option, the robust AGM construction and dual-purpose performance make it a solid choice for boaters who prioritize starting power without sacrificing deep-cycle endurance.

View all product features

• Marine-Grade Confidence: Harness the endurance and dependable energy you need to power every journey on the water, on the road, off the grid, or wherever adventure takes you.
• Dual-Purpose Power: 100 Ah deep-cycle capacity delivers strong cranking power to start your engine and the long-lasting endurance to keep electronics and gear running for hours.
• Strong Starting Advantage: Delivers 80 CCA and 850 CA for quick, dependable engine starts even in any climate or terrain.
• High Marine Cranking Power: Delivers 850 Marine Cranking Amps (MCA) to start your engine with strength and reliability, giving boaters superior starting performance compared to standard marine batteries.
• Long-Lasting AGM Durability: Offers up to 700 cycles at 50% depth of discharge, delivering longer life compared to typical AGM marine batteries.
• Built strong for Real-World Conditions: Maintenance-free and spill-proof design delivers steady energy for waves, trails, and off-grid life, built with heavy-duty AGM technology for any rough terrain.
• Tough ABS Protection: Encased in a rugged ABS shell that resists impacts and heat, providing added safety and dependable energy in demanding environments.
• All-Season Versatility: Built to absorb vibration and harsh marine conditions, it delivers dependable power year-round and is ideal for boaters who need strong cranking power and steady energy for electronic accessories.
• Dimensions: Measuring 12.06 x 6.62 x 8.25 in, 9.25in Total Height and weighing 61.70 lbs
• Two-Year Warranty: Built to last and backed by a two-year limited warranty for added protection with every charge.

---

CYCLENBATT 12V 100Ah LiFePO4 Battery – Lightweight & Long-Lasting for Solar and Trolling Motors

The CYCLENBATT 12V 100Ah LiFePO4 battery brings the benefits of lithium chemistry to the Group 27 form factor. Weighing 66% less than lead-acid batteries and 15% smaller, it’s an ideal upgrade for trolling motors, solar systems, and RVs where every pound matters. With up to 15,000 deep cycles, this battery lasts 10 years or more—far outlasting any AGM or flooded option. The built-in 100A BMS protects against overcharge, over-discharge, and short circuits, and the low-temperature charging protection prevents damage when temperatures drop below 32°F.

This battery uses Grade A LiFePO4 cells for stable performance and higher energy density. If you’re replacing a lead-acid Group 27 battery in a solar-powered cabin or an electric trolling motor setup, you’ll appreciate the plug-and-play simplicity and the extra runtime—twice as much usable capacity compared to a lead-acid battery of the same size. It’s not designed for engine starting (no high CCA), but for deep-cycle applications, it’s a game-changer.

View all product features

• 【Suitable for Group 27】CYCLENBATT 12V 100Ah battery measures 12.09*6.65*8.19 inches, which can be easily put into Group 27 battery box. No complicated wiring is required, just simple plug and unplug to replace Group 27 size SLA battery, which is very suitable for running in various vehicles and applications.
• 【Low Temperature Charging Protection】12v battery has low temperature charging protection function. When the temperature sensor of BMS detects that the battery temperature is lower than 32℉, BMS will immediately cut off the charging function to protect the battery. When the temperature returns to 40℉, the charging function of lithium batteries will automatically resume, effectively protecting the battery.
• 【Grade A battery and smart BMS protection】12v lithium battery uses Grade A square lithium iron phosphate batteries, which have higher energy density and more stable performance. In addition to low temperature protection, 100ah lifepo4 battery provide overcharge, over discharge, over current, short circuit and high temperature protection through a powerful BMS to ensure safe battery use and effectively extend battery life.
• 【Perfect Replacement for Lead-Acid Batteries】Compared to lead-acid batteries, 12 volt battery are 66% lighter and 15% smaller, which can effectively save more space and are very suitable for installation in RVs. They are the perfect replacement for lead-acid batteries. The service life of 12V lifepo4 battery is 10 years, which is 5 times that of lead-acid batteries, which means you don't need to replace new batteries frequently, which can save more costs!
• 【Wide Application】Lithium batteries 12v are very suitable for 12V 30-70 lbs trolling motor and can also be used in off-grid systems, RV battery, marine battery, home energy storage and other fields. At the same time, solar battery support series and parallel connection, up to 48V (51.2V) in series, and the capacity can be expanded to 400Ah, allowing you to configure the appropriate power system according to your needs. (Not suitable for golf carts)
• 【5-year warranty and 24-hour quickly response】 CYCLENBATT provides five-year warranty to all customers, if there are any problems during battery use, please contact us on Amazon, our customer service team will respond quickly within 24 hours.

---

MARXON Group 27M Marine Battery – Affordable Dual-Purpose AGM for RVs and Boats

The MARXON Group 27M AGM battery delivers a solid dual-purpose performance at a budget-friendly price. With 800 CCA, 175 RC, and 92Ah capacity, it can start your RV engine or marine motor while also powering auxiliary electronics like fish finders, radios, and trolling motors. The dimensions (12.05×6.61×8.19 inches) match standard Group 27M cases, making it a direct drop-in replacement for many boats and RVs. The two terminal sizes included add convenience for different cable connectors.

Safety is a priority with a maintenance-free, sealed design that resists vibration and acid leaks. MARXON backs this battery with a 24-month warranty and US-based support, which gives you peace of mind. While it doesn’t offer the extreme cycle life of lithium, it’s a dependable AGM that balances cost and performance for weekend boaters and occasional RV travelers.

View all product features

• Battery Parameters—Group 27M Battery dimensions: 12.05*6.61*8.19inch(L*W*H). 12V 92Ah 800CCA 175RC Terminal:Left:Positive, Right:Negative. Listing is for the Battery and Screws only. 2 terminals of different sizes for more convenience
• dual purpose— This means that the battery can be used as a starting battery to start RV and marine, and can also provide power for on Marine or RV electronics ( navigation aids, fish finders, running lights, radios, and trolling motors, etc.).
• Safe to use— Maroxn group 27M battery are typically a bit larger than a standard car battery and are built to withstand the vibrations and conditions of a marine environment. Maintenance-free design make battery to use without adding acid and water to ensure your safe use
• US local office— We have established offices and warehouses in US. If product have any problems, we can solve it for you in USA. We provide 24 months warranty , and we will reply to your email within 12 hours
• Marine electrical systems are commonly set up in 12, 24, or 36 volts depending on the size of the watercraft and its trolling motor.If you have a 12-Volt trolling motor, you can choose from the 12V options that will suit your capacity requirements. If you have a 24-Volt trolling motor, you can use two, 12-Volt batteries in series with a multi-bank charger or multiple 24-Volt batteries in parallel to meet your capacity requirements. If you have a 36-Volt trolling motor, you can use one 36v trolling motor battery , or you can use three, 12-Volt batteries in series with a multi-bank charger.

---

Power Queen Lithium Group 27 125Ah Bluetooth – Extended Runtime with Smart Monitoring

The Power Queen 12V 125Ah Bluetooth LiFePO4 battery pushes the group 27 format to its limits. With 1,600Wh of energy—320Wh more than typical 100Ah lithium batteries—it powers a 10W light for 32 extra hours, making it ideal for extended boondocking or long days on the water. The built-in Bluetooth 5.0 lets you monitor SOC, voltage, current, and temperature from your phone, plus remotely turn discharge on or off. That real-time visibility eliminates guesswork and power anxiety.

This battery uses automotive-grade LiFePO4 cells and a self-developed BMS with 20+ protections, including low-temperature cut-off for charging below 32°F and discharging below -4°F. It can handle up to 15,000 cycles, equivalent to a 10-year service life. The pre-charge function ensures compatibility with all inverters. If you need max capacity and smart control in a Group 27 package, the Power Queen is unmatched.

View all product features

• 【Bluetooth 5.0 Real-Time Monitoring & Remote Control】Power Queen 12V 125Ah LiFePO4 battery integrates advanced Bluetooth 5.0 technology. Scan the QR code on the battery top, and you can view battery data and status in real time via the Bluetooth app, including SOC, voltage, current, power, temperature, low-battery reminder, charge/discharge status, protection status, etc. No more guessing games, eliminating your power anxiety! You can also remotely control battery discharge and power off via Bluetooth (within 10 meters), putting control at your fingertips for ultimate convenience.
• 【Universal Group27 Fit&Longer Runtime】Power Queen 12V 125Ah lithium battery is designed in a BCI Group 27 size(12.13×6.69×8.31 inches). Compared to the 12V 100Ah lithium battery of the same size, it offers an impressive energy increase of 320Wh, it can run 32 hours longer when powering a 10W lighting lamp. Perfect for RVs like the 2024 Brinkley Model Z 2900, Thor Four Winds 22E, and Forest River Forester. Also an ideal choice for trolling motor,marine,camping, solar systems, home energy storage, and off-grid living.
• 【Self-Developed Smart BMS】20+ Protections, Zero Compromise.Power Queen 12V 125Ah Bluetooth LiFePO4 battery adopts self-developed Battery Management System (BMS) with high precision and rapid response. Beyond industry-standard protections against overcharge, over-discharge, overcurrent, short circuit, and overtemperature, it has low-temperature charge/discharge protection,the battery cuts charging＜32°F, cuts discharging＜ -4°F, ensure battery safety even in cold winter conditions. The pre-charge function allows the battery to be compatible with all inverters on the market.Auto-resumes power supply only 30s after overload protection, ensuring safe and stable device operation even in emergency.
• 【Cost-Effective & 10-Year Hassle-Free】Power Queen’s 12V 125Ah lithium ion battery with Bluetooth, built with automotive-grade eco-friendly LiFePO4 cells.One battery can accompany your RV or boat for 10 years, up to 15,000 cycles—far surpassing lead-acid batteries (2-3 years, 200-500 cycles),eliminating the need for frequent replacements.With a energy equivalent to 2.6 units of 12V 100Ah lead-acid batteries,it’s a smarter long-term investment for unmatched value and reliability. 
• 【Own Factory and Excellent Customer Service】With our self-owned factory, Power Queen ensures top-tier quality via establishing a full lifecycle management and maintenance system. It holds multi – international certifications (FCC, CE, RoHS, UN38.3), meeting the ABYC standard E-13. Each battery has a unique traceability code and comes with a 5 – year warranty. We offeer 24/7 all-round service, including product consultation, technical support, after-sales service

---

CYCLENBATT 12V 100Ah Bluetooth LiFePO4 – Smart Deep Cycle for Marine & Camping

This CYCLENBATT 100Ah LiFePO4 battery adds Bluetooth connectivity to the already impressive lithium lineup. Through the CYCLENBATT app, you can check battery status, state of charge, and fault logs right from your phone, making it easy to manage power on a camping trip or while operating a trolling motor. The Group 27 size at 21.49 lbs is a direct replacement for lead-acid, and it delivers twice the runtime per charge. With a 100A BMS that handles low-temperature protection (charge cut-off below 32°F, discharge cut-off below -4°F), it’s safe for winter use.

You can expand the system up to 4S4P for a total of 20.48KWh, ideal for larger off-grid setups or multiple marine batteries in parallel. It’s not meant for engine starting, but for deep-cycle tasks like powering a 12V 20-80 lb trolling motor, RV lights, or a solar backup, it’s a versatile and intelligent choice. The real-time monitoring gives you peace of mind that your battery is healthy and ready.

View all product features

• 【Real-time Battery Monitoring】 The CYCLENBATT 100Ah LiFePO4 battery features an smart BMS with built-in Bluetooth 5.0. The lifepo4 battery can be monitored in real-time via the CYCLENBATT app, providing full battery information and making battery management easier.
• 【No Fear of Low Temperature Environments】The 12V lithium battery comes with a low-temperature shutdown function. When the temperature sensor detects that the battery temperature falls below 32℉, the BMS will cut off charging. If the temperature drops below -4℉, it will cut off discharging, ensuring the battery is protected in low-temperature environments. The lithium batteries 12V is ideal for marine battery, trolling motor battery, RV battery, boat battery, and solar panel battery.
• 【Perfect Replacement for Lead-Acid Batteries in Group 27 Size】The 12-volt lithium battery is built to the BCI Group 27 standard size, weighing 21.49 LB. It is a perfect replacement for your boat or RV lead-acid battery. This significantly reduces weight while the lifepo4 battery 100ah provides up to twice the runtime of a lead-acid battery.
• 【Max. 20.48KWh】The 12V 100ah lifepo4 battery can be expanded to 4S4P, forming a 20.48KWh power system. The deep cycle marine battery 12V is ideal for use in 12V 20-80 lb trolling motors battery, RV battery, marine battery, off-grid systems, solar energy setups, home energy storage, boat battery, and camping. With just one deep cycle battery 12V, most energy needs can be met. (Not suitable for use as a golf cart battery or starter battery.)
• 【Extended Service Life and BMS Protection】The lithium trolling motor battery uses high-quality A-grade cells, with a lifespan of over 5000 cycles. The 100ah lithium battery smart BMS provides multiple protections, including overcharge, over-discharge, over-voltage, over-current, short-circuit, high temperature, and low temperature, effectively extending the battery's lifespan. Additionally, the BMS features an auto-recovery function, where the battery will automatically return to normal after five minutes of triggering protection, without manual intervention.
• 【5-Year Warranty】 CYCLENBATT offers a 5-year warranty for all customers. If you encounter any issues with the battery during use, please contact us for after-sales solutions. For returns or exchanges due to battery quality issues, CYCLENBATT will cover the costs. If you have any questions about our 12v lifepo4 battery, feel free to contact us, and our professional customer service team will be happy to assist you.

---

Lipower Group 27 Solid State Battery – 1500A CCA and 10-Year Lifespan for Extreme Cold

The Lipower Group 27 solid state battery is a revolutionary option for automotive starting, combining stable 650-1500 CCA output with a 10-year lifespan. Unlike AGM or lead-acid batteries that degrade every 2-3 years, this solid-state design maintains its performance for the life of your vehicle. It delivers 1500A cranking current even after 100+ stop-starts in heavy traffic, and its -30°C (-22°F) cold-start capability ensures one-click ignition in the harshest winters without any warm-up or jump start.

This battery fits standard Group 27 dimensions (12.05×6.81×8.58 inches) with terminals oriented for many cars and trucks (positive right, negative left when facing label). It’s perfect for full-size SUVs, pickups, RVs, and marine applications where reliable starting and longevity are critical. The advanced BMS protects against overcharge, over-discharge, and short circuits, and the solid-state cells are much safer than traditional lithium. If you live in a cold climate or drive a vehicle that demands high cranking amps year after year, the Lipower is a game-changer.

View all product features

• 𝗗𝗶𝗿𝗲𝗰𝘁 𝗙𝗶𝘁 𝗚𝗿𝗼𝘂𝗽 𝟮𝟳 𝗖𝗮𝗿 𝗕𝗮𝘁𝘁𝗲𝗿𝘆: Our 12V car battery features standard Group 27 (12.05"*6.81"*8.58") and original SAE terminals: Positive [+] on the RIGHT and Negative [-] on the LEFT (Facing label), allowing 10-minute DIY replacement. Measure your original automotive battery size and polarity before purchase to ensure perfect fit, avoiding return hassles. This 12 volt battery works as a direct automotive replacement solid state battery for full-size cars, SUVs, pickups, and marine applications, matching OEM fit seamlessly
• 𝟭𝟬-𝗬𝗲𝗮𝗿 𝗟𝗶𝗳𝗲𝘀𝗽𝗮𝗻: Unlike AGM car batteries or traditional lead-acid auto battery that need replacement every 2–3 years, our solid state 12v start-stop car battery delivers 10 years of reliable service, requiring only one replacement for the entire vehicle life. Save 3–4 times the cost and time of frequent battery changes, making it an ideal pickup battery, auxiliary battery, marine battery, or RV battery for long-term ownership
• 𝟭𝟱𝟬𝟬𝗔 𝗖𝗖𝗔 𝗖𝗮𝗿 𝗕𝗮𝘁𝘁𝗲𝗿𝘆: Powered by advanced BMS, our automotive replacement batteries maintains stable 650–1500CCA output and 12.8V voltage, even after 100+ stop-starts in heavy traffic. No cranking hesitation, no flickering lights, and no damage to starters or infotainment systems. Perfect as a heavy-duty battery, pickup battery, or marine battery for consistent high-power performance
• -𝟯𝟬°𝗖 𝗜𝗻𝘀𝘁𝗮𝗻𝘁 𝗦𝘁𝗮𝗿𝘁: Engineered for extreme cold, our 12v rechargeable battery delivers full CCA output at -30°C/-22°F, enabling one-click instant ignition in snowy garages or outdoor parking. No warm-up, no jump start needed—ideal for pickup battery, truck battery, marine battery, or cold-region use, outperforming optima batteries and AGM battery in low-temperature performance
• 𝗭𝗲𝗿𝗼 𝗟𝗲𝗮𝗸 & 𝗘𝘅𝗽𝗹𝗼𝘀𝗶𝗼𝗻 𝗣𝗿𝗼𝗼𝗳: With solid electrolyte technology (no liquid electrolyte), our solid state battery eliminates leakage, corrosion, and thermal runaway risks. Even under extreme impact, drop, or puncture, it will not explode or catch fire—safer than lithium-ion battery or AGM battery. This makes it a trusted car battery for family vehicles, RVs, boats, and modified trucks
• 𝗨𝗹𝘁𝗿𝗮-𝗟𝗼𝘄 𝗦𝗲𝗹𝗳-𝗗𝗶𝘀𝗰𝗵𝗮𝗿𝗴𝗲: Featuring an ultra-low self-discharge rate (≤0.04%/month), our Group 27 battery retains over 97% capacity after 6 months of parking. No dead battery, no jump start rescue—perfect for long business trips, winter storage, RV travel, or marine use. As a reliable battery for car, boat, or RV, it stays ready whenever you need it
• 𝗩𝗲𝗵𝗶𝗰𝗹𝗲 𝗦𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗙𝗶𝘁: Our Group 27 automotive battery fits full-size sedans, SUVs, pickups, RVs, marine vessels, and stop-start vehicles. It works as a direct replacement for Group 27/27F batteries, delivering superior power for daily commuting, off-roading, long-distance travel, boating, and heavy-duty electrical loads
• 𝗜𝗕𝗦 & 𝗦𝘁𝗮𝗿𝘁-𝗦𝘁𝗼𝗽 𝗥𝗲𝗮𝗱𝘆: Fully compatible with IBS intelligent sensors and auto start-stop systems. CRITICAL STEP: Mandatory OBD battery registration is required post-installation to sync the car's ECU. Skipping this will trigger error lights and shorten battery life. 2 Ways to Register: 1. DIY: Use an OBD2 scanner for adaptation, then drive 20-30 mins； 2. Local Service: Code it at any auto shop

---

US Battery US 27DC XC2 Flooded – Heavy-Duty Deep Cycle for Solar and Backup Power

The US Battery US 27DC XC2 is a flooded lead-acid deep cycle battery designed for commercial-grade cycling service. With 105Ah capacity at the 20-hour rate, it provides long run times for solar systems, backup power, and heavy marine use. The XC2 formulation and Diamond Plate Technology accelerate cycle-up to rated capacity, delivering consistent power across hundreds of cycles. It’s rated at 205 minutes at 25 amps, 77 minutes at 56 amps, and 54 minutes at 75 amps—solid numbers for sustained deep discharge.

Flooded batteries require periodic water top-ups, but they offer a lower upfront cost and high total energy delivery for stationary applications. This 2-pack bundle gives you two batteries for large banks in RVs or off-grid cabins. If you’re building a budget-friendly deep-cycle system and don’t mind occasional maintenance, the US 27DC provides reliable, proven performance that has earned a following among serious solar enthusiasts.

View all product features

• US Battery XC2 Flooded Deep Cycle Battery (2 Pack) – Includes (2) U.S. Battery US 27DC XC2 flooded lead acid deep cycle batteries engineered for dependable cycling service and commercial deep cycle use.
• Group 27 / 12 Volt / 105Ah Capacity – BCI Group 27, 12V, rated 105Ah (20-hour rate) for long run time and consistent deep cycle power delivery.
• Flooded Lead Acid (FLA) Construction – Non-sealed flooded battery design built with XC2 formulation and Diamond Plate Technology for fast cycle-up to rated capacity and high total energy delivery.
• Deep Cycle Runtime Ratings – Rated 54 minutes @ 75 amps, 77 minutes @ 56 amps, and 205 minutes @ 25 amps for dependable runtime performance in deep cycle applications.
• SAE/Bolt Terminals + Commercial Grade Case – SAE/Bolt terminal configuration with heat-sealed polypropylene case construction for reliable installation and service use.

---

SDULIBITIY 12V 80Ah Lithium Starting Battery – Lightweight 1300CCA for Automotive Use

The SDULIBITIY 12V 80Ah LiFePO4 battery is designed specifically for starting engines, offering a massive 1300 CCA in a lightweight package. Weighing only one-third of a comparable lead-acid battery, it reduces front-end weight and improves handling in cars, trucks, and SUVs. The lithium iron phosphate cells provide stable voltage and high discharge rates, outperforming standard lead-acid batteries that typically offer only 500 CCA. The built-in smart BMS ensures safety against overcharge, over-discharge, short circuit, and high temperature.

This battery excels in low-temperature conditions where ordinary lead-acid batteries struggle—it can start your vehicle even below freezing without hesitation. Its compact dimensions (12×6.8×8 inches) fit Group 27 (N70) trays, but note that the terminal layout has positive on the left and negative on the right (check your vehicle). It is not designed for deep-cycle use or parallel/series connections, but for automotive starting, it delivers exceptional cranking power and weight savings. The 60-month warranty adds extra confidence.

View all product features

• Battery dimensions ：Group 27 (N70), 12 x 6.8 x 8 inches, Terminal Layout: Left: + Right: -. 12.8V 80AH 1300CCA.Tips: Please check battery size before purchasing. Please note: Batteries cannot be used in series or parallel.
• Safety Performance:Lithium car battery is light in weight and has high starting current; its weight is one-third of the general lead-acid battery, which can effectively reduce the weight of the front end of the car. The battery is equipped with BMS control circuit, the safety performance is completely better than ordinary lead-acid batteries.
• Starting Ability: high rate power imported lithium iron phosphate battery pack, starting ability than ordinary lead-acid battery starting ability is one times higher; ordinary starting battery is generally only 500CCA cold start current, lithium iron battery starting current up to 1000CCA or more.
• Low-Temperature Performance: excellent low-temperature performance, in the sub-zero environment can also be easily started, while the internal electrolyte of the ordinary battery is greatly affected by the temperature, below-zero start is very difficult; in the winter to better reflect the advantages of lithium iron battery.
• Maintenance Is Convenient: ordinary batteries do not have a BMS control board, it is very easy to forget to turn off the lights or stop and listen to music, long-term unused car battery damage, maintenance is relatively troublesome without regularity, lithium iron batteries have a comprehensive intelligent protection circuit, over-charging, over-discharging, over-voltage, over-current and other protections.
• Upgraded LiFePo4 car batteries: These batteries are lightweight, long-lasting, and have excellent charging and discharging performance. If you need to replace your battery or are looking to upgrade, our LiFePo4 lithium-ion automotive batteries are your best choice. If you have any questions, please feel free to ask and we will respond within 24 hours.

---

Buyer’s Guide: What to Consider

Choosing the right group 27 battery depends on your application—whether you need starting power, deep-cycle endurance, or both. Consider the battery type, capacity, CCA, and physical fit to match your vehicle or setup. Below are the key factors to evaluate before making your decision.

• Battery Type: Group 27 batteries come in flooded, AGM, lithium, and solid-state variants. Flooded are cheapest but require maintenance. AGM offers a balance of maintenance-free operation and good cycle life. Lithium (LiFePO4) provides the longest life, lightest weight, and best deep-cycle performance but costs more upfront. Solid-state (like Lipower) is emerging for starting with extreme CCA and longevity.
• Capacity (Ah) & Reserve Capacity: Amp-hour (Ah) rating tells you how much energy the battery can store. For deep-cycle use, higher Ah (e.g., 100-125) means longer runtime. Reserve capacity (RC) indicates minutes the battery can supply emergency power. Consider your gear’s power draw and how long you need it to run.
• Cold Cranking Amps (CCA): If you need to start an engine, CCA is critical. Higher CCA (e.g., 800-1500) ensures reliable starting in cold weather. For marine and RV starting, look for marine cranking amps (MCA) as well. Lithium starting batteries often have much higher CCA than lead-acid of similar size.
• Dual Purpose vs. Dedicated: Some batteries are dual-purpose (starting + deep cycle), while others specialize. If you need both engine start and power for electronics, choose a dual-purpose AGM or lithium. For pure deep-cycle use (solar, trolling motor), a dedicated deep-cycle lithium will offer the best cycle life.
• Maintenance & Safety: AGM and lithium batteries are maintenance-free, while flooded batteries need water top-ups. Lithium batteries include a BMS that protects against overcharge, over-discharge, and temperature extremes. If you plan to use the battery in freezing conditions, ensure it has low-temperature charging protection.
• Physical Fit & Terminal Orientation: Group 27 batteries have standard dimensions, but terminal location varies. Check your battery box and cable routing: some have positive on left, others on right. Confirm the battery height and terminal type (SAE, bolt, or stud) to avoid installation issues.
• Cycle Life & Warranty: Lithium batteries can last 10-15 years (thousands of cycles), while AGM typically lasts 3-5 years, and flooded 2-4 years. A longer warranty (e.g., 24 months or more) indicates manufacturer confidence. For heavy use, lithium’s higher upfront cost often pays off over time.

Conclusion

Group 27 batteries come in diverse chemistries and performance levels, each suited to different tasks. For marine and RV dual-purpose use, the WEIZE Dual Purpose AGM offers a great balance of starting and deep-cycle power. If you need extreme cold-start CCA and long life, the Lipower solid-state battery is revolutionary. For deep-cycle solar or trolling motor applications, lithium options like the Power Queen 125Ah or CYCLENBATT Bluetooth give you lightweight performance and smart monitoring.

Always match the battery’s specifications to your specific demands—starting, storage, or both—and consider the total cost of ownership. A well-chosen group 27 battery will keep your adventures powered for years to come.