1. Input voltage: 4.5V ~ 5.5V. 2. Input interface: micro USB port (phone used). 3. Charging method: linear charge. 4. A full charge voltage: 4.2V. 5. Charging current: 1A (default), modify the integrated resistance to adjust the charging current in accordance with the table below. 6. Charging accuracy: 1.5%. 7. Charge indicator: blue LED charging, red LED solid. 8. Reverse output: Lithium batteries cannot be reversed. 9. Dimensions: 25 x 19 x 10mm.