Waveshare UPS Module (A) - for Raspberry Pi Pico

This battery module from Waveshare is made for the Raspberry Pi Pico or other microcontrollers that use the same pin layout. With this module and a 14500 Li-ion battery (not included) you provide your microcontroller with an uninterrupted power supply (UPS). The microcontroller will therefore not reset if the charging voltage drops or appears. The battery can be charged via the USB port of the microcontroller that is mounted on it.

Note: Normal AA batteries also fit in the holder, but do not insert them! This can lead to dangerous situations with fire, or even explosion, as a result. Only use this module in combination with suitable rechargeable Li-ion/Li-Po batteries.

Note: A 14500 battery and Raspberry Pi Pico are not included.

See the following page for more information: Wiki