This Built-in uninterruptible power supply (UPS) design keeps your Raspberry Pi Zero running safely during power outages or unexpected disconnects.
When external power is lost, the board automatically switches to 18650 battery power to ensure continuous operation and protect your data and is compatible with standard 18650 lithium batteries (not included).

The X306 UPS shield intelligently switches between external 5V input and 18650 battery output without interruption. This ensures stable voltage output to the Raspberry Pi Zero and prevents sudden shutdowns that may cause file system corruption or data loss.