I am trying to build a portable device using the Pi Zero W and some 5V sensors. For the power supply I thought about a power bank meant for charging phones. The problem is that to power the device off, I need to add a NC switch between the battery and load (when held down it simulates the phone being disconnected, thus shutting off the charger until its ON button is pressed again). Another problem is the risk of the user unsafely shutting down the Pi.
So I was wondering what kind of assembled battery charging /management PCBs are available for my application? The PiJuice seemed possible, but is out of stock.
In summary the requirements are: 1. Boost to 5V 2. Switch to USB power when plugged in 3. A on-off switch + safe shut off 4. Preferably for 10000 mAh 3.7V LiPo battery
Does this even exist?
Many thanks, Ben