Your worst lithium cells

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Oberfail

Member
Joined
Jun 22, 2021
Messages
110
I went through my rejected 18650's and came across a couple of weird cells. My 2 most weird cells are a pair of Panasonic CGR18650C cells, they hold very little charge and as soon as they hit 3.7 volt, their internal resistance increaes up to 2 Ohm.

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What are your weiredst batteries you came across?
 

floydR

Member
Joined
Aug 23, 2017
Messages
1,330
I had a 18650 that reversed polarity don't remember what brand it was. Yes i was measuring it right red to + and black to -. I have had paper wrapped cells 17670. A few LIFePO4 A123 26650 That popped their top while salvaging medical batteries zero volt well >2mv.
later floyd
 

OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
1,801
A couple of hundred Green Sony G5/G7s - IR in 200-300mOhm - caused me much grief in early days till I drank @Wolf's cool aide (thank you @Wolf for IR work) and just set them aside to a 'world of their own'.
 

Wolf

Active member
Joined
Sep 25, 2018
Messages
1,622
till I drank @Wolf's cool aide
🤣 🤣 I was going to mention the Sony US18650GR - G4 through G8 but you beat me to it. I don't think they are bad cells just that they don't play well with others. If you put them in a sandbox by themselves I think they would be OK but mix them up with other brands not so much.

Wolf
 
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