atlas down tube battery pack 48v 10.4ah 11.6ah 13ah 14ah for fat tire electric bicycle with charger

1. life expectancy is two times compare with the lead-acid batteries, weight is much lighter than the lead-acid battery. 2. no memory effective and rechargeable, the battery life is longer. built-in ic chip will prevent battery pack over charge, over discharge, over-current,over-heat, short circuit. 3. safer and more environmentally friendly, no heavy metals and hazardous substances, avoiding mechanical accidents caused by vibration..syi