Features: USB Type-C Rechargeable Nickel Zinc Battery is of 1.6V and adopts environmentally friendly material of nickel positive and zinc negative without heavy metal. The working voltage range of 1.85V-1.3V can be compatible with alkaline batteries. For high-current, high-voltage and high-power electrical appliances, it is significantly better than the disposable alkaline batteries. The environment temperature for electrical appliances is -30 to 80 degrees. It can be discharged at a rate of 1-3C for continuous discharge and 10C for instant discharge. It is so far the safest battery in the world.