Is it possible to power the heltec v3 with NIMH batteries? Like maybe 4 in series (4.8v) or 3 in series (3.6v)?
Would it even charge them or is the charging only for li-ion battery packs like the 3.7v one that everyone suggests?
I don’t want to buy it if I don’t need it, I have old NIMH batteries in abundance and I’m not sure what my final setup should look like yet.
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My guess is that you could power the board, but charging will end in disaster.
Nimh isn’t as energy dense as li-ion as I recall? So an 18650 is probably a better bet.
Yeah my plan was without charging. But I found another solution anyways :)
Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching).
Seems like this is only for lithium batteries. Maybe it can run off NIMH batteries but not charge them?
https://resource.heltec.cn/download/WiFi_Kit_32_V3/HTIT-WiFi kit32_V3(Rev1.1).pdf Lithium battery(≥250mA) min: 3.3 typical: 3.7 max: 4.2
So I guess I could try to run it on three AAA batteries. Worst thing to happen is I fry the board, which was only 10€. I’ll wait for a reply here though
Edit: I meant AA batteries
