Item Type: UPS Power Board Material: Printed Circuit BoardFunction: UPS power supply specially designed for Zero. Charging Current: 400mAOutput Current: 1.3A at 5V (no external adapter is plugged in, only battery power is used), 2A at 5V (when the external adapter is inserted). Power Measurement Accuracy: Error ±2%Battery Specification: 1 x 3.7V 1000mAh Lithium Battery(built in battery)Package List：1 x UPS Power Board4 x NutNote:It is recommended to use a power adapter with a power of 5V2A and above to the UPS Lite. Because when the lithium battery is low, the external power adapter not only needs to supply power to for , but also needs to provide part of the current to the lithium battery.