Question about Duracell AAA NiMH Battery Charger with 4 Rechargeable AA Battery

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Batteries require several charges in order to reach fully capacity

This relatively new 15 minute charger charged my batteries fully the first time but subsequent charges have yielded considerably shorter battery life. 25 hours in a headset initially then about 5 hours. I discovered if I charged the batteries more than one time in the charger I could eventually get the battery life up to the original 25 hours. The actual number of charges to reach full is more like 3-4 times in the 15 minute charger. I have not talked to duracell about this but plan to contact them for their explanation for this behavior. Why do you think the 15 minute charger is not fully charging before it shuts off?

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I wont exactly call this solved but I called duracell and they think the batteries are old. They are sending me a new set of batteries.

Posted on Sep 08, 2008

  • S Rees May 22, 2014

    since i wrote the above comments duracell did send me new batteries. I still charge the batteries (which are a different version) in the 15 minute charger. With the new batteries after I have charged them four at a time and let them cool, I put them i separately and find that some will charge for a minute or two longer and others will signal that they are full in short order. I believe what is occuring is that when they are bulk charged, they stop charging when the first one reaches capacity. by topping them individually they may reach their own capacity.

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