Key Specifications/Special Features: Single battery model: 18650 Packaging method: Industrial PVC heat shrinkable film Wire model: Black and red wire UL3239 20AWG, yellow and blue wire UL3239 26AWG Voltage of single cell: 3.7V Nominal voltage after battery pack combination: 7.4V Capacity of single battery: 3.4ah Battery combination mode: 2 strings and 2 parallels Voltage range of battery after combination:5.0V~8.4v Battery capacity after combination: 6.8ah Battery pack power: 50.32w Battery pack size: 39*39*67mm Maximum discharge current: < 6.8A Instantaneous discharge current: 13a-18a Maximum charging current: 0.2-0.5c Charging and discharging times: ＞ 500 times Certifications: ISO9001、UL、CB、KCXuanli electronic Co.,ltd is an experienced manufacturer of batteries specialized in smart battery packs,18650 lithium batteries,polymer lithium batteries,lithium iron phosphate batteries,power batteries,battery charges and various special batteries. We welcome OEM and ODM orders and we sincerely hope to work with you hand in hand to creat a prosperous future.Battery capacity test cabinet;overcharge tester;short circuit tester vibration testing machine;roller testing machine;internal resistance detector constant temperature and humidity chamber;salt spray test machineOur main products are excellent rechargeable Li-ion batteries,LifePO4 batteries,Li-PO batteries and Ni-MH batteries.Which are used widely in AGV、robots、medical devices、communication energy storage、home reserve power supply,R/C models、unmanned aerial vehicles/drones、wireless electronics products,personal care products、electric scooter and vehicles、solar energy storage system、lighting,etc.Do not disassemble, dispose in fire, heat or short circuit Do not insert batteries with the (+) and (-) reversed Do not mix fresh batteries with used batteries Do not submerge the battery in water