Add multiple battery low voltage readings to prevent early shutdown (especially during TX spikes) - #3462
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Add multiple battery low voltage readings to prevent early shutdown (especially during TX spikes)#3462P4tches wants to merge 1 commit into
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…especially during TX spikes) (cherry picked from commit 2f79bea)
Blake-Latchford
approved these changes
Sep 20, 2026
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Tested on my Heltec V3 and a bench top power supply. Confirmed that a 'transient' drop over 8s is detected, but only a 24s low voltage condition shuts the board down.
@P4tches note that since I'm nobody on this project my approval doesn't actually mean anything in the process. Hopefully a rando confirming your code works means something.
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During power spikes, especially during TX, battery voltage sags below AUTO_SHUTDOWN_MILLIVOLTS. To help avoid this problem, 3 consecutive readings are taken before shutdown is invoked.
Are additional readings going to affect battery life?
No, this change continues to read only every 8 seconds, leading to ~24s of low battery before shutoff.
Is this dangerous running the battery below the autoshutdown?
No, the floor is 3300mV on LilyGo/Thinknode and 3400mV on Heltec/RAK, both safely above the 3000mV cutoff of the Lithium cells.