Thread: Rechargeable batteries draining without use

Originally Posted by Smiddy

Are you measuring these with the volt reader on the charger or using an actual multimeter? Your charger may be incorrect - would be interesting to compare them


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Just on the charger mate. I will compare with a multimeter as well next time the charger shows a big drop.

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Measuring resting voltage of cells is a minefield. It's what they do under load that matters. By the time the resting voltage has dropped measureably, they've probably lost most of their capacity.

Another issue is making sure you're comparing apples with apples. Lithiums generally lose very little charge over time compared to say old NiCds. My Bosch cordless drill lithiums sit for months and months and seem to lose bugger-all. The old NiCds from years back were noticeably down after two months.

I'd advise basing comparisons between cells on actual run-time rather than open-circuit voltage measurements before deciding which to throw out.

Originally Posted by Puffin

I'd advise basing comparisons between cells on actual run-time rather than open-circuit voltage measurements before deciding which to throw out.

They do seem to get a good/expected runtime when charged. So probably not worth worrying about.

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I’m having the same problem with the eneloop pro AA using a nightcore charger. If I let them sit between uses they seem to loose a lot of their charge. Been using them in my head torch and pretty much have to charge them before going out every time. If I don’t charge them between trips I notice significantly lower run time in both the battery in the head torch and the spare I carry round with it.


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Originally Posted by LittleDave

I’m having the same problem with the eneloop pro AA using a nightcore charger. If I let them sit between uses they seem to loose a lot of their charge. Been using them in my head torch and pretty much have to charge them before going out every time. If I don’t charge them between trips I notice significantly lower run time in both the battery in the head torch and the spare I carry round with it.


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Lithium batteries do lose charge. Unsure what the rates of loss are but I have to top mine up between use. I’m using the same as you
Is it a problem charging them before trips? If you charge them at least you have the peace of mind they are full

Originally Posted by LittleDave

I’m having the same problem with the eneloop pro AA using a nightcore charger. If I let them sit between uses they seem to loose a lot of their charge. Been using them in my head torch and pretty much have to charge them before going out every time. If I don’t charge them between trips I notice significantly lower run time in both the battery in the head torch and the spare I carry round with it.


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Like @R93 - I also having issues with the Eneloop Pro's
I put it down to - there is a lot of crap (2nds) out there in the "online" marketplace

Can't prove - but I most deff have with Lithium AA's
Had 50% of one batch of 80 out of Germany were dud's

So I think in future I might buy from a Camera shop and if a problem take back - they generally source from Head Manufacturer - I hope ?? - maybe not

keep them in a sealed container in the fridge. cold slows down the discharge.

Originally Posted by LOC

Lithium batteries do lose charge. Unsure what the rates of loss are but I have to top mine up between use. I’m using the same as you
Is it a problem charging them before trips? If you charge them at least you have the peace of mind they are full

Yeah they seem to loose quite a lot of charge, I’m also not sure what the discharge rate is. It just feels like it shouldn’t be that bad, the nimh batteries I use are good for a lot longer. It isn’t much of a problem charging them but I’d imagine they have max amount of charges before they run out of life.


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