I’m looking to build a circuit that powers both a portable LCD display that requires 7+ volts and a pi zero w along with a small USB hub. This requires that I have two 3.7v LiPo batteries run in series in order to obtain the 7.4v current needed to run the display.
The issue I’m having is figuring out how I’m going to run them in series and also be able to balance charge them without having to remove them.
Does anyone know if it’s safe to use something like the Zero LiPo Shim and run these batteries in series off the side terminals to something like an Adafruit Power Boost 1000 or something similar? I’d rather not burn out my LiPo Shim or my Pi Zero W if I can at all help it.
This has been perplexing, to be sure. I don’t see a lot of information floating out there on the web that has been of much use. I’d rather not use a mechanical switch for this if I don’t have to, as I’d like for it to be as automated as possible.
Ultimately I’d like to be able to run the unit, and when it registers a low battery condition, I could simply plug it in and it would charge the batteries while providing enough power to keep the whole show running.