Eunorau Flash Extra Battery: 52V21Ah (2nd) | 52V17Ah (3rd) | Both

Eunorau Flash Extra Battery: 52V21Ah (2nd) | 52V17Ah (3rd) | Both Compatible with: EUNORAU FLASH Battery Details: 52V21Ah HYFX-D LG3500 lithium battery Model 52V21Ah lithium ion ebike battery Nominal Voltage 52V Rated Capacity 21Ah Weight 13.9 lbs Standard Charge 4A Type Down tube battery type  Color Black Cycle life 500-800times Charger 4A charger  Application bike Eunorau Flash BMS and Balance Short-circuit protection, Over-charge protection, Over-discharge protection, Over-current protection, Balance   52V17Ah Hailong lithium battery Model 52V17Ah lithium ion ebike battery Nominal Voltage 52V Rated Capacity 17Ah Weight 10.5 lbs Standard Charge 4A Type Top tube battery type  Color Black Cycle life 500-800times Charger 4A charger  Application bike Eunorau Flash BMS and Balance Short-circuit protection, Over-charge protection,Over-discharge