What happened to my AW batteries?

[StickyShisha2]

i trade back and forth every day or so, my two pairs of AW IMR18350.
one pair are totally dead. 0.00 on meter. and they won't take a charge.

 

[215z]

Does your charger have a cycle mode or reconditioning mode you could try?

Did your cells get shorted during storage or transit?

 

[hanfhead]

I have had them get below the cutoff and need a jump to revive them. Some chargers will do it automatically. I think that's what 215z is saying to try.

http://batteryuniversity.com/learn/article/low_voltage_cut_off

 

[OF]

i trade back and forth every day or so, my two pairs of AW IMR18350.
one pair are totally dead. 0.00 on meter. and they won't take a charge.

Sounds like a short to me, fairly common for one, but both of one pair??? In general you don't want them to deep discharge (yeah, I know.....), but even 'dead' from this they don't usually measure 0.00.

Do you know someone who has a meter (Ohmmeter function on common DMMs is what we want)? If they are shorted, you're SOL, otherwise we can probably recover most/at least some of the capacity.

I have had them get below the cutoff and need a jump to revive them. Some chargers will do it automatically. I think that's what 215z is saying to try.

http://batteryuniversity.com/learn/article/low_voltage_cut_off

Not a factor here, although generally a good catch. IMRs don't have protection boards (none are needed normally) a plus factor that many call on to justify their higher cost, lower capacity and difficulty finding them stocked.

OF

 

[StickyShisha2]

one shows 2.5 ohm and the other doesn't seem to show any continuity.

 

[OF]

one shows 2.5 ohm and the other doesn't seem to show any continuity.

Thanks.

The 2.5 is probably toast, but one that reads 'open circuit' has potential. Most chargers have a 'search' or 'trickle' charge feature that will eventually bring the battery up enough in charge to be detected. After that, normal charging can take over. But as long as it reads zero volts there's no way the charger knows it's there......

I suggest putting it in the charger and leaving it. I have several Li-ion chargers, all but one (or maybe 2) will do this eventually. If you have a meter you can see them 'creep up' to about 2.5 Volts, where the LED shifts and normal charging starts.

OF

 

[StickyShisha2]

Thanks.

The 2.5 is probably toast, but one that reads 'open circuit' has potential. Most chargers have a 'search' or 'trickle' charge feature that will eventually bring the battery up enough in charge to be detected. After that, normal charging can take over. But as long as it reads zero volts there's no way the charger knows it's there......

I suggest putting it in the charger and leaving it. I have several Li-ion chargers, all but one (or maybe 2) will do this eventually. If you have a meter you can see them 'creep up' to about 2.5 Volts, where the LED shifts and normal charging starts.

OF

thank you for the info

i will see if i can get this one to charge.

i always use them in pairs. This pair has about a year of use. I guess i will get a fresh pair

 

[OF]

thank you for the info

i will see if i can get this one to charge.

i always use them in pairs. This pair has about a year of use. I guess i will get a fresh pair

You're welcome, hope it helps.

Good luck on charging it. Don't forget to try another charger if you have one, some don't it seems? Although I'm not sure what one lame battery does for you in a world that needs matched pairs.....

Good call, keeping them paired. Out of balance, the weaker one takes a real beating sometimes. For sure I'd have a backup set handy. It's always wise to have a known good battery to swap in if 'things don't seem right'. Adding more goods on a guess is not a wise policy IMO, much better to verify battery before anything else. You can always switch back once the duty batteries are confirmed sea worthy.

Good luck with it, you can beat a couple little batteries like those......

OF