I just received these 2 batteries, as soon as I took them out of the packaging I measured with the multimeter in 9V mode and they give me these values.
Can someone help me figure out what state they're in and why I'm getting those values?
by Odd8228
I just received these 2 batteries, as soon as I took them out of the packaging I measured with the multimeter in 9V mode and they give me these values.
Can someone help me figure out what state they're in and why I'm getting those values?
by Odd8228
5 Comments
Set it to 20V DC, the 3rd option to the left of OFF and measure again, just to make sure the 9V battery mode is not doing some fuckery
Li ion batteries shouldn’t be discharged below 2.5V, but it’s better to stay above 2.8V, so the 2.53V one is probably good unless it was kept like that for a long time, the other one is not great
They are too deeply discharged (especially 2.19V one) hence potentially dangerous.
Batteries should come with ~3.6V = half charged.
I would make a short video when you’re measuring them, to back your claim. If you purchased them on Aliexpress I would turn to Aliexpress directly and not waste time talking with the merchant.
2.19: straight into recycling
2.53: borderline. Most modern cells can be discharged this deeply without damages, older cells can not. With a very slow careful charge it should be fine, but monitor it closely and do it in a non-flammable environment.
That’s a bad sign even if recoverable (I wouldn’t touch the 2.19V though, no idea for how long it’s been that low). Cells should be shipped at ~30-50% SoC. So either these are *very* old cells that’s been sitting on a warehouse shelf for years, or they have very high self-discharge rate. Given that your DMM is accurate of course.
I’d try getting your money back and get some proper cells from a known OEM. The Liitokala cells are very dubious and they’ve been peddling fake Samsung 30Q and other well known cells for years. That’s not something a reliable brand does. Impossible to know what they’re re-wrapping.
Be careful with them.
There was a time LiitoKala were a decent battery but over the years the dodgy sellers have slipped in and you’re never quite sure what you’ve ended up with.