Question about rechargeable batteries

A.Penny.Saved

techspec wrote: »

Is there any way of checking when batteries are no-longer any use.

I have hundreds for rechargeables - and no idea which are still in good nick.

Any decent battery charger will have a check function. It takes some time as it has to charge, discharge and then re-charge the battery in order to find out the usable capacity. My PowerEx has found that 2 of the AAA rechargeables that I recently purchased are well below their rated capacity at around 700mAh instead of 900/950mAh which they should be. 900 is meant to be the lowest acceptable.

The PowerEx charger, the best one available has it and so do the BL-700 clones.

andy2004

So buy a £50 battery charger to test batteries ?
mine is a uniross x-press 300 and i know for a fact it doesnt have a check function, but then what you expect for a £5 with 4 batteries.

espresso

andy2004 wrote: »

So buy a £50 battery charger to test batteries ?
mine is a uniross x-press 300 and i know for a fact it doesnt have a check function, but then what you expect for a £5 with 4 batteries.

No, you don't need to spend £50 to get decent charger e.g. here

The UniRoss X-Press 300 Battery Charger is timer controlled and basically a pile of crap.

To get the best out of any rechargeable battery, the charger should use deltaV charging which delivers the maximum charge into any capacity cell and then cuts the charge current.

andy2004

I might buy that one. I like the fact it can be used in car via a 12volt adapter.