Lithium Battery Expansion Board for Raspberry Pi 5V Regulated Output Bi-directional Fast Charging
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Works nice, well designed and soldered. Fits quite well on Raspberry Pi Zero. Can not be used as UPS. You need to power off the HAT to charge it - https://www.waveshare.com/li-ion-battery-hat.htm
perfect 👌 remember the 14500 battery
great for rpi zero - it runs for few hours standalone (if there is no display on it)