The Golisi S35 21700 is a high performance 3750mAh rechargeable lithium battery with 40A high constant current applications. The INR 21700 battery can be recharged for more than 800 times and is enough to run various high drain devices. Compared to traditional batteries, it is more powerful, safer and economic to use. Best choice for you! Brand:Golisi Unit: 1 set Size: 21*70mm Model: 21700 Capacity: 3750mAh Constant Current: 40A Nominal Voltage: 3.7V Charging cut-off voltage: 4.20+/-0.05V Safety protection: Based on UL1642 standard, no leaking or explosion in extreme tests of over charging, short circuit, over discharging, high temperature Standard charging current: cc/cv(800 Operate temperature: Charging(0-45C), Discharging(-20-60C) Storage Temperature: Room temperature, dry place Apply to: e-cig MODs, flash lights, toys Shipping weight: 108g Package: Simple Packing