Rechargeable Batteries

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I was in the Post Office waiting in line when I saw one of those battery recharging units with batteries, these to be exact:

http://www.walgreens.com/dbimagecache/200293.jpg

The charger also worked with 9V and AAA size, and so would be perfect for effects pedals (9V) and for digital audio recorders / keyboards / tacky kid's toys (AA), all of which chew them up reasonably fast.

However, closer inspection of the AA batteries reveals that they are 1.2 volts, not 1.5 like normal batteries.

What the fuck's with this and will they work? Are there any rechargeable ones which are 1.5v?

― S- (sgh), Tuesday, 8 August 2006 04:28 (nineteen years ago)

waste of money

― a name means a lot just by itself (lfam), Tuesday, 8 August 2006 04:51 (nineteen years ago)

Really? I go through 2x AA's for every 3-5 hours of recording.

― S- (sgh), Tuesday, 8 August 2006 07:08 (nineteen years ago)

i use mine for my bike lights and cd player, it's saved me shitloads of cash. i have no idea what voltage they are though.

― emsk ( emsk), Tuesday, 8 August 2006 08:26 (nineteen years ago)

I use those for my camera, MP3 player, remote controls - basically everything I own that uses AA/AAA batteries. I don't understand about voltage but they're fine, and definitely money-saving.

― Archel (Archel), Tuesday, 8 August 2006 08:31 (nineteen years ago)

Make sure they're not Cadmium and you're fine.

― Andrew Farrell (afarrell), Tuesday, 8 August 2006 08:32 (nineteen years ago)

Yes, you need the ones made by the rats of Nimh.

― NickB (NickB), Tuesday, 8 August 2006 08:37 (nineteen years ago)

lithium ion yo

― ken c (ken c), Tuesday, 8 August 2006 09:04 (nineteen years ago)

the LiON king

― RJG (RJG), Tuesday, 8 August 2006 09:05 (nineteen years ago)

Thanks, but what about the voltage issue? Is this going to ruin delicate gear?

― S- (sgh), Wednesday, 9 August 2006 06:10 (nineteen years ago)

gear can look after himself hahahahahaIkillme

― beanz (beanz), Wednesday, 9 August 2006 07:49 (nineteen years ago)

I think AA rechargables are always 1.2V rather than 1.5V and there's some leeway anyway: batteries don't deliver a constant voltage across their life.

(Googling tells me that the voltage of an alkaline battery will drop linearly from 1.5V to about 0.7V, and then cut off. A rechargeable battery will deliver 1.2V to 1.0V output .)

― Alba (Alba), Wednesday, 9 August 2006 08:20 (nineteen years ago)

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