1、POWER OUTPUT: Uninterruptible power supply module, with maximum output of 5V 1A, and supplied by polymer lithium battery or 18650 lithium battery. 2、OVERVOLTAGE PROTECTION: The module has input overvoltage protection. When the input exceeds 6V, the input will be cut off automatically to enter the battery power supply mode. 3、REVERSE PROTECTION: The module has reverse connection and short circuit protection. When the external power input exceeds 20V, the protection unit will be broken down. 4、GOOD PERFORMANCE: The battery boost module supports simultaneous charging and discharging, with large current and high efficiency, which is stable and reliable. 5、WIDE APPLICATION: The power board can be used for battery chargers, mobile power supplies, infrared alarms, switches and other network devices, routers, etc.