Hardware random abrupt power offs?

[Deleted User]

It could be the battery. I'm not certain if it is.
Basically for a while now, (I have a a launch day switch) about, two months ago, I experienced the first abrupt power off. where the system just, shuts off. No warning. nothing. I do use custom firmware, however I don't have any system modules installed. (just sign patches with atmosphere)
And recently it's gotten pretty bad/happening more often
I do use autorcm.
Now, I say could be the battery, because something jank did happen. See it's not just randomly powering off in handheld mode. Docked too. Which is a bit concerning. I'll be looking into getting a replacement battery, but until then I want to know any other possible causes.
And I'm certain it's not a custom firmware issue. Atmosphere would crash and put something up if it was something on it's side. (it's a complete shut down, and I have to wait for the system to charge in some instances, even when the battery is near or is 100% and in other instances I have to just plug it back in and reboot.)

 

[Deleted User]

I do use an official dock and charger, so that shouldn't be causing issues.

 

[thesjaakspoiler]

Lithium batteries can be charged up to 500 times officially but some already fail at 300 charge cycles and some are fine at +1000 cycles.
If it happens around the same battery level (like say less then 40% remaining) then it's most likely your battery.
If it happens when you stress out the cpu/gpu and it draws a lot of power, it might be the battery management circuit that can't keep up with the demand.
You can see a lot of battery statistics in Hekate :