submitted 1 month ago by stoy@lemmy.zip to c/flashlight@lemmy.world

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I have an Acebeam Pokelit 2AA, a brilliant little light, my first true EDC light.

It uses a custom Lithium battery called ARC14100P-160A which has a USB-C charging circuit built into the top of the battery.

This week the battery died, I noted that the light didn't turn on with the battery, but with 2x 2AA NMIH it works.

When I connect it to charge, the charge LED just lights up green and the battery pulls no current (tested with my USB power meter), I tried to test the voltage of the battery with a multimeter, but it shows as 0 volts.

To me, all of this indicate an issue with the battery's protection circuit, as I believe even a discharged lithium battery should show some voltage.

Has anyone else seen this issue?

What weirds me out about this is that the charge LED just shows as fully charged when I connect it...

Is it trickle charging at that point, do I plug it in and leave it?

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[-] SammysHP@lemmy.world 6 points 1 month ago

What weirds me out about this is that the charge LED just shows as fully charged when I connect it…

Is it trickle charging at that point, do I plug it in and leave it?

Could be as simple as a bad spot weld on the battery. When the charging circuits floating, it might see the input voltage on its output and no current and interpret it as a fully charged battery. Could also be a damage of the protection circuit or even an internal damage in the battery.

Don't try to charge it. Something is wrong with the battery and you don't want to burn down your home.

this post was submitted on 04 Jul 2026

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