... temperature(-10, +50) degree CentigradeBattery charging timeapprox 4 hours with universal charger, 2 hours for travel chargerStorage one year tem-20 to ... than 500 models for your choice.Warning:1. Use specified charger only. 2. Must be disposed of properly. 3. May explode ... disassemble. 5. To prevent short circuit, never put it together with conductors, such as keys, coins, etc.6. Keep the battery ...