2021 liitokala 36v 48v electric bike battery pack 10ah 12ah 15ah 20ah hailong 18650 cells powerful bicycle lithium batteries usb port black

1. the life span is twice that of lead-acid batteries, and the weight is lighter 2. no memory effect, rechargeable, longer battery life 3. safer, more environmentally friendly, of heavy metals and harmful substances. 4. built-in ic chip to prevent the battery pack from overcharging, overdischarging, overcurrent, overheating, short circuit. 5. avoid mechanical accidents caused by vibration. model: sea dragon battery color: black battery size: 367.2*90.1*111mm bms function: over current protection, over discharge protection, over charge protection, short circuit protection, balance