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  #1 (permalink)  
Old 16th April, 2005, 07:28 PM
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Digital camera batteries. New AA rechargeable NiMH.

Is it OK for now to toss them into a Panasonic charger from 1988, designed for NiCad's?

Daniel and & I can't agree, is it safe - and effective?

Thanks.
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Old 16th April, 2005, 07:32 PM
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My charger says it will do both.

I would say yes. You can even charge up non-rechargeable batteries a few times. No, they don't catch fire.
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Old 16th April, 2005, 08:31 PM
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Throw them in for a min or two, see if they come back to life at all. (you should get power for a second or two. If they work then maybe leave then in for half an hour and check them to see if they are getting really really hot. If they are, pull them out.
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Old 16th April, 2005, 08:36 PM
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As long as you aren't using a quick charger (one that can charge the batteries in 2-3 hours or less), you should be ok. Quick chargers for NiCd batteries use the characteristic rapid change in charging voltage as the battery reaches full charge as an indicator of this condition. With NiMH batteries, this characteristic is much less pronounced, and would most probably be missed by a charger not designed for NiMH batteries. With trickle chargers (ones that take like 14 hours to recharge) this isn't an issue, because the charge condition is self limiting.

Hope this helps.
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Old 16th April, 2005, 09:42 PM
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Thanks, guys. Sounds like I'm safe with the oldclunker I have to use.
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Old 17th April, 2005, 04:34 AM
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NONONONNONONONON!!!!!
If it is from 1988, it won't be able to handle NiMh!!!!

Trust me, first hand experience. I had a AA charger for NiCad, I bought new NiMH AA's and was too cheap to get a charger. Within 3 seconds, the batteries started making a sizzling sound, and then started to leak.

Usually, chargers that can handle both have a manual switch. Some newer one's manage it automatically. If it is more than a couple of years old, dump it. It's not worth the risk!!
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Old 17th April, 2005, 04:29 PM
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Quote:
Originally Posted by SteveI
NONONONNONONONON!!!!!
If it is from 1988, it won't be able to handle NiMh!!!!

Trust me, first hand experience. I had a AA charger for NiCad, I bought new NiMH AA's and was too cheap to get a charger. Within 3 seconds, the batteries started making a sizzling sound, and then started to leak.

Usually, chargers that can handle both have a manual switch. Some newer one's manage it automatically. If it is more than a couple of years old, dump it. It's not worth the risk!!
Just curious Steve, were you using a quick charger?
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Old 18th April, 2005, 12:29 AM
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There's a FAQ answer here:
http://www.starbatteries.com/charger...20older%20NiCD
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Old 22nd April, 2005, 07:49 PM
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Looks like I need to lay a few bucks down for the right charger asap. Thanks for all the personal input and links, too. Best regards to all!
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