10 Best Battery Kit for Bike Reviews

You’ve finally decided to convert your bike into an electric ride, or maybe you’re upgrading an existing e-bike. But with so many battery options—different voltages, capacities, BMS ratings, and connector types—the choice can feel overwhelming. A wrong pick could mean poor range, slow speeds, or even safety risks. That’s why we’ve tested and compared the ten most reliable battery kits on the market.

In this guide, you’ll find detailed reviews of each kit, from high-voltage 72V packs for speed demons to compact 48V units for daily commuters. We also explain what to look for in a battery kit, so you can ride with confidence. Whether you’re building a fat-tire off-roader or a lightweight city bike, we’ve got you covered.

EXECYC 52V 25Ah – Long-Range Powerhouse with UL2271

If you need serious range and reliability, this EXECYC 52V 25Ah pack is a top contender. It uses a 50A smart BMS that protects against overcharging, overdischarging, and short circuits, and it’s UL2271 certified by SGS—a rare safety guarantee. The 25Ah capacity delivers up to 75km (47 miles) of range under ideal conditions, making it perfect for long weekend rides or heavy commutes.

The battery features a 5-pin baseplate compatible with most 48V/52V motors (500W–1800W), including Bafang, Voilamart, and AW kits. It comes with an XT60 discharge connector and a 58.8V 3A charger. The integrated safe lock and power switch add practicality, while the LED indicator keeps you informed. Dimensions are 368x95x150mm, so it fits many standard frames.

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• 50A Smart BMS: The battery is also equipped with a built-in 50A BMS system that can protect the battery from overcharging, overdischarging, and short circuits and ensure the long life expectancy, The charging cycle is more than 1000 times, the battery life can reach 5 years. Each battery has successfully passed all necessary tests and certification.
• Bike Battery Parameter: 52V 25AH long range ebike battery 5-Pin Baseplate for 48V/52V 500W 750W 1000W 1200W 1500W 1800W brushless motor, compatible with Bafang Voilamart AW Tongsheng and most motor kits. Charging time: 7-8 hours, Range distance: 55-75KM, depend on riding conditions, road conditions, rider weight, slope, riding speed etc. Size: 368*95*150mm/14.49*3.74*5.9inch (L*W*H). Discharge Connector: XT60 connector.Max Constant Discharge Current:50A(BMS) Charger:58.8V 3A
• Useful Features: The Safe Lock prevents the battery from being stolen; the Power Switch can avoid wasting power; LED power Indicator, inform you charge your battery on time Perfect Choice for Battery Replacement: Our Hailong Lithium Ion battery has been though thousands of repetitive discharge tests and safety test, you can use it without worry.
• Compatible with Adult Electric Mountain bikes, Fat Tire Electric Bikes, City Commuter Electric bicycles, snow beach e-bike, hybrid bicycle, tricycles, folding bikes, city bikes and balance bikes
• Upgrade & Ride in Minutes: Power your e-bike effortlessly with our easy-to-install 52V 25Ah ebike battery. Before ordering, simply ensure your frame has space for its compact dimensions (365*95*150mm). Designed for wide compatibility and tool-free setup, it features a user-friendly design that makes installation quick and straightforward — so you can spend less time setting up and more time riding. Enjoy long-range power with zero hassle.
• 1 Year Guarantee: All new batteries enjoy a 1-year warranty. We have technical team based to offers the best customer support. You can customized e-bike conversion assemblies, include types of cell, various parameter of batteries or motor

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EXECYC 72V 20Ah Triangle Pack – High Voltage for Speed Demons

For those building a high-power e-bike (up to 3500W), this 72V 20Ah triangle battery from EXECYC is a beast. It uses high-quality LG 5000mAh cells and a 60A continuous BMS, ensuring stable delivery even under heavy load. The triangle shape fits perfectly in the frame’s triangle, lowering the center of gravity for better handling.

The pack comes with an XT60 discharge connector and a 84V 4A charger for faster charging. A clear LED indicator shows remaining charge, and a key lock prevents theft. It’s compatible with most 0–3500W motors and is ideal for fat-tire bikes, mountain bikes, and e-trikes. The built-in 60A BMS protects against short circuits, over-current, over-charge, and over-discharge, giving you peace of mind at high speeds.

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• 【Battery Parameter】LG5000mah cells, tiangle ebike battery —-72V lithium battery parameters:72v 20Ah battery suitable for 0-3500W motor.constant discharge current: 60A; Charging connector:84V 4A; Discharge connector: XT60 (include male & female side).
• 【BMS protection】72volt battery Built-in 60A BMS protection board for using security, it can protect the bike battery from the damages of short-circuit, over-current, over-charge, and over-discharge, to provides safety while in the electric bike battery running.
• 【Product Features】 LED indicator can provide you a clear awareness of the remaining power ; With safety key lock, preventing the battery from being stolen. Each pack have ran through a full charge and discharge test in produce, make sure you getting every amp hour you paid for.
• 【Wide Compatiblity】Our electric bike replacement battery can fit most motor kits. Best choice for adult electric mountain bike, commute ebike, hybrid bicycle, e trike, fat tire bike and so on
• IP66 waterproof protection, aluminium case, stronger. Little rain short time no problem.

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Varstrom 52V 20Ah – Reliable Mid-Range Option with CNC Cells

Varstrom offers a well-rounded 52V 20Ah battery that balances capacity, weight, and safety. It features a 30A continuous BMS and retains ≥80% capacity after 800 cycles, meaning it will last several years with regular use. The battery uses a proprietary CNC cell holder that keeps each cell secure, and each cell has its own fuse for extra protection.

The pack is compatible with mid and hub motors from 50W to 1500W, including Bafang, Voilamart, and AW kits. It has an XT60 female connector and a 5-pin base. The integrated lock and power switch are standard, and the mounting bracket fits most water bottle screw holes, making installation a breeze. Dimensions are 368x95x125mm – slightly slimmer than some competitors.

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• Parameter : This 52V 20Ah e-bike battery is compatible with mid motors and hub motors ranging from 50W to 1500W , including 1500W , 1200W , 1000W , 750W and 500W models. It features a maximum continuous discharge current of 30A . The dimensions are 368mm x 95mm x 125mm , with an XT60 Female discharge connector and 5pin battery base
• ≥80% Capacity Retention : After 800 cycles , the battery retains ≥80% of its original capacity . Varstrom enforces a rigorous quality control policy, ensuring that every lithium-ion battery passes a comprehensive QC inspection for both appearance and functionality before dispatch. The ebike battery boasts a charge cycle life exceeding 1000 cycles, with an estimated lifespan of up to 5 years
• Useful Features : The integrated lock system safeguards against theft. The power switch can avoid wasting power . LED power indicator light can inform you charge on time. The battery pack includes a mounting bracket compatible with most water bottle screw holes on bike frames, allowing for easy installation and removal. Designed for hassle-free removal, enabling convenient charging at home or elsewhere
• Safety Assurance : Our Hai*-long e-bike battery is engineered with a proprietary CNC cell holder , ensuring a secure and robust structure. Each cell within the battery pack is equipped with a fuse , and the entire system benefits from dual-layer protection by a Battery Management System (BMS), ensuring your safety and peace of mind
• Safety and Maintenance Tips : Avoid short-circuiting the battery to prevent permanent damage. For optimal battery life, recharge the battery before it is completely depleted. Once the charger's indicator turns green, please turn off the power supply to avoid overcharging

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EXECYC 60V 20.8Ah – Mid-Voltage Sweet Spot for 1500W–2000W

This 60V 20.8Ah battery from EXECYC hits the sweet spot for riders with 1500W to 2000W motors. It comes with a 50A BMS, same as the 52V model, but at a higher voltage for slightly more speed. The pack is UL2271 certified by SGS, adding a layer of safety validation.

It uses a standard 5-pin baseplate and XT60 discharge connector. The charger is 67.2V 3A, which charges the battery in about 7–8 hours. The safe lock, power switch, and LED indicator are all present. Range is rated at 45–65km depending on conditions. It fits most frames with a 368x95x150mm form factor.

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• Smart BMS: The battery is also equipped with a built-in 50A BMS system that can protect the battery from overcharging, overdischarging, and short circuits and ensure the long life expectancy, The charging cycle is more than 1000 times, the battery life can reach 5 years. Each battery has successfully passed all necessary tests and certification.
• 60 Volt Battery Parameter: 60V 20.8Ah long range ebike battery . Charger:67.2V, 3A. 5-Pin Baseplate for 60V 500W 750W 1000W 1500W 1800W 2000W brushless motor, compatible with Bafang Voilamart AW Tongsheng and most motor kits. Charging time: 7-8 hours, Range distance: 45-65KM, depend on riding conditions, road conditions, rider weight, slope, riding speed etc. Size: 368*95*150mm/14.49*3.74*5.9inch (L*W*H). Discharge Connector: XT60 connector.
• Useful Features: The Safe Lock prevents the battery from being stolen; the Power Switch can avoid wasting power; LED power Indicator, inform you charge your battery on time. Perfect Choice for Battery Replacement: Our Hailong Lithium Ion battery has been though thousands of repetitive discharge tests and safety test, you can use it without worry. Compatible with Adult Electric Mountain bikes, Fat Tire Electric Bikes, City Commuter Electric bicycles, snow beach e-bike, hybrid bicycle, tricycles, folding bikes, city bikes and balance bikes
• Upgrade & Ride in Minutes: Power your e-bike effortlessly with our easy-to-install 60V 20Ah ebike battery. Before ordering, simply ensure your frame has space for its compact dimensions (365*95*150mm). Designed for wide compatibility and tool-free setup, it features a user-friendly design that makes installation quick and straightforward — so you can spend less time setting up and more time riding. Enjoy long-range power with zero hassle.
• 1 Year Guarantee: All new batteries enjoy a 1-year warranty. We have technical team based to offers the best customer support. You can customized e-bike conversion assemblies, include types of cell, various parameter of batteries or motor.

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BAFANG BBS02B/BBS-HD Mid Drive Kit – Complete Conversion with Battery Option

BAFANG is a household name in e-bike conversions, and this mid-drive kit offers a complete solution: motor, display, throttle, brake levers, and an optional battery. It comes in 500W, 750W, and 1000W versions (BBS02B or BBS-HD) with torque ratings up to 160 Nm, making hill climbing effortless.

The kit fits bottom brackets of 68–73mm, 100mm, and 120mm. You can choose from several CAN protocol displays (VD03, EKD01, DPC010, DPC080) that allow parameter adjustments via the display or BAFANG GO App. The optional battery is sold separately, but the kit itself includes everything else. Speed tops at 45 km/h, and you get throttle, PAS, and standard cycling modes.

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• Complete Accessories:This Bafang Mid-drive motor BBS02B/BBS-HD kit includes most necessary electric bike accessories, such as brake lever, chainwheel,thumb throttle,speed sensor, headlight , bottm bracket removal tool,Battery(optional) and LCD display(optional).You can choose different parts according to your needs to DIY your own beloved electric bicycle
• Universal Fit for Most Bikes:The adaptable BAFANG 500W/750W/1000W mid-drive kit seamlessly integrates with bottom brackets 68-73mm, 100mm, and 120mm lengths and 33.5-36mm inner diameters, adhering to JIS norms. Note: 73mm screws aren't included; please choose it if needed. Designed to enhance MTBs, city cycles, recumbent trikes, and more, with compatibility limited to disc or V-brake equipped, chain-driven models only
• Unleash Your Ride's Potential:The BAFANG 500W/750W/1000W BBS02B/BBS-HD motor commands a powerful 100/120/160 N.m torque, effortlessly conquering diverse terrains—from urban commutes to off-road adventures. With velocities up to 45KMH, it transforms hill climbing be a breeze . Offering Throttle, Pedal Assistance, and Standard Cycling modes, it tailors your journey to your every need
• Personalize your CAN protocol display selection: Choose from a range of advanced displays to customize your e-bike experience: optional VD03 display, EKD01 display, VD04 display,VD618 display, VD18MT display and BAFANG's DPC010 and DPC080 displays (BAFANG's displays can modify motor parameters on the display or BAFANG GO APP, no USB programming cable required). Each display offers unique features, ensuring you find the best display for your ride
• Personalize Your Battery Selection: The BAFANG CAN bus mid motor is not limited to BAFANG batteries, it is compatible with the 48V 13Ah/16Ah/18.2Ah/20Ah and 52V 20Ah electric bike batteries we provide (if you choose the "without battery" option, your shipment will not include a battery); please make sure you prepare a compatible 48V battery in advance. The motor will be equipped with a male XT60 connector, so please make sure your battery connector is compatible with this motor

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EXECYC 48V 13Ah – Compact Entry-Level Pack with USB Port

This 48V 13Ah battery from EXECYC is perfect for lighter e-bike builds (up to 1000W). It has a 30A BMS and comes with a useful USB port to charge your phone or lights while riding. The pack is compact (365x90x110mm) and includes a mounting bracket that attaches to standard water bottle screw holes.

With a range of about 30–45km, it’s enough for daily commutes or short leisure rides. The key lock and on/off button are practical, and the LED indicator shows remaining charge. It uses grade A cells and has no memory effect. Note: the 5-pin base is compatible with most 48V kits.

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• 【Parameters】48 Volt Electric bicycle battery come with 30A Smart BMS, Applicable motor: 1000W / 750W / 500W / 300W / 250W; Built in connector XT60; Battery weight: about 4.5kg; Battery size: (mm) L365 * W90 * H110; The base discharge port is 5 pins.
• 【Design Features】 The 48V 13Ah electric bike battery pack has a mounting bracket that will mount to most water bottle screw holes in the frame. It's easy to remove and charge at home or bike; Lock with keys securely, locks the plate mount on bike frame, prevents the battery from being stolen; With USB port can charge cell phone; With on/off button, save more power; Lighted battery LED power Indicator, inform you charge your battery on time.
• 【Built-in Grade A cells】 Hailong Lithium Ion Battery equipped with a 30A Smart BMS protective plate, prevent over charge, over discharge, over current and short circuit and ensure the long term use of your Bike Motor and your ebike battery, don't have any memory impact or self-discharge problems.
• 【Wide Compatiblity】Our electric bike replacement battery can fit most motor kits. Best choice for adult electric mountain bike, commute ebike, hybrid bicycle, e trike, fat tire bike and so on.
• 【Best After-Sales Service】 We aim to bring you nice experience and top quality ebike battery. If the product has any problem or if you do not know whether this Electric Bike Battery fits for your bike, please contact our store, We will help you to solve any problems and provide best service for all customers.

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LIVALL PikaBoost 2 – Unique Rear-Wheel Assist System with Smart Safety

The LIVALL PikaBoost 2 is not a traditional battery kit but a complete pedal-assist system that attaches to your rear wheel. It includes a built-in battery (220Wh or 158Wh options) and a roller that drives the tire. Installation is tool-free and takes minutes – no wires, no hub motor.

It features a multi-layer BMS for safety, a gyroscope that stops assist if the bike tilts over 30°, and automatic SOS alerts if tilting exceeds 60°. The V-shape tire provides long tread life (3000–5000 km). Range is up to 70km (43 miles) for the 220Wh version. Note: requires a 65W USB-C charger (not included) and round seatposts 25–35mm.

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• Note: Use a 65W USB-C charger (not include). Compatible only with round seatposts (25-35mm). Check size before installation. Not suitable for children's bicycles, This product is a pedal-assist accessory only and is not a complete electric bike
• Quick Installation: LIVALL PikaBoost 2 assist device installs quickly and securely on your bike’s rear wheel without extra wires. Easily switch between pedal-assist riding and regular cycling without removing the unit
• Durable and Long-lasting Battery: Equipped with a multi-layer Battery Management System (BMS) for safety, PikaBoost 2 offers two battery options. Under ideal conditions, the 220Wh model delivers up to 70km (43 miles) of riding range, while the 158Wh version supports up to 50km (31 miles)
• Multiple Safety Protections: The durable V-shape tire provides strong grip and a lifespan of 3,000–5,000 km. The assist system automatically stops if the gyroscope detects a tilt over 30°, and sends an SOS alert if the tilt exceeds 60°, helping reduce risks on slippery roads or sharp turns
• Smart Connectivity & APP Control: Connect through the mobile app for automatic setup and calibration. Riders can switch between 3 assist modes (Assist Mode, Cruise Mode, Workout Mode), create riding groups with friends, and access remote troubleshooting features

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Varstrom 48V 13Ah – Affordable and Safe with Dual-Layer BMS

Varstrom’s 48V 13Ah battery is a close competitor to the EXECYC 48V 13Ah but with a few key differences. It uses a 30A BMS and features Varstrom’s CNC cell holder with per-cell fuses for dual-layer protection. The pack retains ≥80% capacity after 800 cycles, promising a long lifespan.

It’s compatible with motors from 50W to 1100W and uses a 6-pin golden pin base (instead of the more common 5-pin). Make sure your motor kit supports this connector. The battery comes with a mounting bracket for water bottle holes, a lock, a power switch, and an LED indicator. Dimensions are 367x90x111mm.

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• Parameter : This 48V 13Ah e-bike battery is compatible with mid motors and hub motors ranging from 50W to 1100W , including 1000W , 750W and 500W models. It features a maximum continuous discharge current of 30A . The dimensions are 367mm x 90mm x 111mm , with an XT60 Female discharge connector and 6 golden pin battery base
• ≥80% Capacity Retention : After 800 cycles , the battery retains ≥80% of its original capacity . Varstrom enforces a rigorous quality control policy, ensuring that every lithium-ion battery passes a comprehensive QC inspection for both appearance and functionality before dispatch. The ebike battery boasts a charge cycle life exceeding 1000 cycles, with an estimated lifespan of up to 5 years
• Useful Features : The integrated lock system safeguards against theft. The power switch can avoid wasting power . LED power indicator light can inform you charge on time. The battery pack includes a mounting bracket compatible with most water bottle screw holes on bike frames, allowing for easy installation and removal. Designed for hassle-free removal, enabling convenient charging at home or elsewhere
• Safety Assurance : Our Hai*-long e-bike battery is engineered with a proprietary CNC cell holder , ensuring a secure and robust structure. Each cell within the battery pack is equipped with a fuse , and the entire system benefits from dual-layer protection by a Battery Management System (BMS), ensuring your safety and peace of mind
• Safety and Maintenance Tips : Avoid short-circuiting the battery to prevent permanent damage. For optimal battery life, recharge the battery before it is completely depleted

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EXECYC 48V 20Ah 960Wh – High Capacity with LG Cells

This 48V 20Ah pack from EXECYC uses genuine LG 5000mAh 21700 cells and a 50A smart BMS, making it one of the most capable 48V batteries on the market. With 960Wh of energy, it can power motors up to 1800W and offers a range of 50–70km depending on conditions.

The battery includes a USB port for charging devices, a key lock, power switch, and LED indicator. It mounts via standard water bottle screw holes. The 50A BMS ensures reliable protection against overcharging and short circuits. At about 4.5kg, it’s relatively light for its capacity. Dimensions are 365x90x127mm.

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• 【Parameters】48 Volt Electric bicycle battery come with 50A Smart BMS, Applicable motor: 1800W / 1500W / 1000W / 750W / 500W / 300W / 250W; Built in LG5000mAH Cells(21700 Cell),With motor connector for XT60; Battery weight: about 4.5kg; Battery size: (mm) L365 * W90 * H127; The base discharge port is 5 pins.
• 【Design Features】 The 48V 20Ah electric bike battery pack has a mounting bracket that will mount to most water bottle screw holes in the frame. It's easy to remove and charge at home or bike; Lock with keys securely, locks the plate mount on bike frame, prevents the battery from being stolen; With USB port can charge cell phone; With on/off button, save more power; Lighted battery LED power Indicator, inform you charge your battery on time.
• 【Built-in LG5000mAH cells】 Hailong Lithium Ion Battery one 21700 cell capacity is LG5000mah, equipped with a 50A Smart BMS protective plate, prevent over charge, over discharge, over current and short circuit and ensure the long term use of your Bike Motor and your ebike battery, don't have any memory impact or self-discharge problems.
• 【Wide Compatiblity】Our electric bike replacement battery can fit most motor kits. Best choice for adult electric mountain bike, commute ebike, hybrid bicycle, e trike, fat tire bike and so on.
• 【Best After-Sales Service】 We aim to bring you nice experience and top quality ebike battery. If the product has any problem or if you do not know whether this Electric Bike Battery fits for your bike, please contact our store, We will help you to solve any problems and provide best service for all customers.

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XIUWK Aluminum Alloy Battery Bracket – Essential Mount for Hailong Batteries

Even the best battery needs a secure mount, and the XIUWK bracket is designed specifically for Hailong-style batteries (used by many kits reviewed here). It’s made from lightweight aluminum alloy (58g bracket, total 170g with hardware) and comes with two adjustable stainless steel hose clamps that fit frame diameters from 46–70mm.

The package includes two nylon straps to protect your frame from scratches, plus fixing screws and an installation tool. The bracket size is 204x20x7mm. It’s a durable, weather-resistant solution that lets you mount your battery without drilling. While not a battery itself, it’s an essential accessory for many conversions.

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• 【Package List】 1*aluminum alloy bracket, 2*adjustable clamps, 2*nylon straps, 4*fixing screws, and 1*installation tool.
• 【Premium Material】Made of aluminum alloy and assembled with stainless steel hardware.Bracket Size:204×20×7mm. Weight：58g.Clamp Width:12mm.Clamp can freely adjust diameter 46-70mm.Total Weight:170g.
• 【Stainless Steel Hose Clamp】Two 12mm wide stainless steel hose clamps enhance the bearing capacity and firmness. The elastic design can be adjusted and is suitable for bicycle frames of different thicknesses. Attached 2*nylon straps can prevent damage to the frame.
• 【Perfect Design】Specifically designed for Hailong batteries, providing a perfect fit and seamless integration with your electric bike.Lightweight and durable, and the battery bracket can be easily installed without drilling.Designed to withstand various weather conditions and rough terrains, providing accurate and secure battery mounting for your electric bike.
• 【Open Slot】Our electric bike conversion kit with open slot, that allows the adapter to be installed on a bicycle frame with a suitable hole. Position can be adjusted along the slot so that the bigger battery should be able to fit in the frame.

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Buyer’s Guide: What to Consider

Choosing the right battery kit for your bike doesn’t have to be confusing. Keep these key factors in mind to match your riding style, motor power, and budget. Each point below will help you narrow down the options from our reviews.

• Voltage Compatibility: Match the battery voltage to your motor controller. Common voltages are 48V, 52V, 60V, and 72V. Higher voltage generally means more speed, but you must ensure your kit supports it.
• Capacity & Range: Capacity (Ah) directly affects how far you can ride. A 20Ah 48V battery gives about 960Wh – enough for 40–70km. Consider your typical ride distance and terrain.
• BMS (Battery Management System): A smart BMS protects against overcharge, overdischarge, and short circuits. Higher amp ratings (e.g., 50A vs 30A) support more powerful motors and better longevity.
• Cell Quality and Cycle Life: Look for batteries with reputable cells (LG, Samsung, etc.) and ratings of 800+ cycles with ≥80% capacity retention. This indicates a long usable life.
• Physical Dimensions and Mounting: Measure your bike's frame triangle or rear rack area. Bottle-cage mounts (Hailong style) are common, but triangle bags or brackets may be needed for larger packs.
• Connector Type and Pin Layout: Most kits use XT60 discharge connectors and baseplates with 5 or 6 pins. Verify compatibility or have adapters ready. Some batteries include a charger, but check voltage.
• Safety Certifications: UL2271 (like on EXECYC models) or similar certifications ensure the battery has passed rigorous testing for safety. This is especially important if you charge indoors.

Conclusion

After reviewing ten battery kits thoroughly, the best choice really depends on your specific needs. If you want maximum certified range, the EXECYC 52V 25Ah is hard to beat. For high-speed builds, the 72V triangle pack delivers unmatched power. Commuters will appreciate the balance of the Varstrom 52V 20Ah, while the LIVALL PikaBoost 2 offers a unique hassle-free entry into e-biking.

Don’t forget to check voltage compatibility, BMS specs, and physical fit before buying. Pair your battery with a quality charger and a secure mount like the XIUWK bracket for a complete, safe setup. Ride with confidence knowing you’ve chosen the right power source for your electric bike conversion.