If you need it, you can contact me by emailBattery type: polymer Combination mode: 1 section nominal voltage: 3.7 nominal capacity: 850mahCharging current: 1C range of use: Consumer Electronics Certification: KC, FCC / CE / PSE / UN38.3, MSDSBattery type: polymer combination mode: 1 Nominal capacity: 1000mah storage temperature: - 20 ° - 60 °Product size: 8 * 30 * 40 battery model: 803040 battery voltage: 3.7V Capacity: 850mah size: 10mm * 25MM * 35MM (thickness * width * length)Protection function: overshoot, overdischarge, short circuit and overcurrent protection full capacity cycle life: more than 300 charge and discharge cyclesIf you need it, you can contact me by email