100% brand new and high quality. Charge module: Linear charging. Current: 1A adjustable. Charge precision: 1.5%. Input voltage: 4.5V-5.5V. Full charge voltage: 4.2V ± 1%. Led indicator: red is charging, green is full charged. Input interface: micro USB/mini usb/type-c usb. Work temperature: -10° to +85°. Inversed polarity: NO.