... °CDischarging:-20°C~70°C Features:1. High operation voltage, Li-ion batteries produce 3.7 volts.2. High energy density ... , with acupuncture, smash, drop, and so on. Application:1: Backup power supply, Medical Device and so on.Approval:CE, UL, REACH ... and ISO 14001:2004 approval have been carried. digital camera/power bank Li-Ion 18650 Rechargeable Battery