BATTERY PARAMETERS: This high-power, high-capacity 52V 31.8Ah lithium battery delivers stable voltage for e-bikes, e-motorcycles, and scooters with motors ranging from 500W to 4000W. It serves as an excellent upgrade or replacement battery for most 52V control systems. BATTERY SIZE: 15.75*8.62*13.58 inches.( 40*21.9*34.5 cm) Before purchasing, please make sure this size fits your bike frame to avoid unnecessary returns. QUICK-ACTING CHARGING: This e-bike battery is equipped with a 4A fast charger, and the battery can be fully charged within 5 hours. BMS PROTECTION: This lithium battery has a built-in 80A BMS, which has short-circuit, over-charge, over-discharge, over-current, and temperature protection, the battery will be protected effectively. Provides powerful and stable power support for long-distance cycling. IP65 WATERPROOF LEVEL: The e bike battery is designed to withstand light rain and typical outdoor conditions; however, it should not be submerged or exposed to prolonged heavy rainfall. LONGER RANGE: This 52-volt, 31.8 amp-hour battery can easily take you 31 to 74 miles, depending on how much power you are pulling. It is highly suitable for long-distance cyclists or those who wish to reduce the frequency of charging. CYCLE LIFE: Over 1,000 charge-discharge cycles. Test: At 25°C, charging: 1C current, 0-100% SOC, 80% SOH. Assembled with imported Grade A cells, delivering exceptional power and extended range for your e-bike. APPLICATION: Electric bicycle, electric tricycle, e-scooter, e-skateboard, motor home, stored energy, power supply, electric lights, golf bus etc. Choose better quality replacement batteries for your e-bike We specialize in the development and research of e-bike batteries, using high-quality materials to provide riders with cost-effective e-bike batteries that meet all kinds of transportation needs of riders, even the desire for sports and outdoor exploration. The 52V 31.8Ah e-bike battery can provide a range of 50-100 kilometers when fully charged (depending on riding conditions, road conditions, rider's weight, etc.). The battery's long range allows you to reach farther places. Imported grade A cell The battery is made of high quality imported lithium-ion samsungcells, combined with 80A BMS protection board, the battery cycle life of more than 1000 cycles.