Editorial Product Review:Item Description:Rayovac Rechargeable Nickel Metal Hydride (NiMH) batteries are the perfect power solution for demanding high-drain devices like digital cameras. They last three times longer than alkaline batteries in digital cameras and can be recharged up to 1000 times!
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Buyer Reviews
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Customer Rating: 
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A "AA" battery in a "D" Case
These Ray-o-Vacs are really just a "AA" battery in a "D" case. Paul L.'s review is exactly on the money. I've seen a website that has a picture of this battery sawn in half, and it's obviously just a double AA inside. The battery itself is palpably far lighter than a regular D-cell. When I put these batteries into a flashlight with regular D-cells, they only last about a quarter of the time; it seems like I have to open the flashlight and replace them every time I use it. If you're camping, that just renders the flashlight almost useless.
Look at the rated capacity of the battery. A decent D-cell should have 5000maH capacity; a good one, 10000maH. These only have 2500maH.
-Boyce Byerly
Customer Rating: 
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Beware of so-called recharegeable "D" batteries
Be careful when shopping for rechargeable batteries! The Rayovac (and Energizer) products have the same Amp-Hour capacity as a "AA" battery! Do a little web searching and you'll find the Energizer is really an AA-sized cell in a "D" package - but sells for much more! I can't speak to the inner construction of the Rayovac, but it has a capcity of 2200 mAh -- definitely in the AA range (in fact, somewhat low for a good rechargeable AA these days). If you want the power capacity that a "D" size package should give you, look elsewhere -- the capacity should be in the 10,000+ mAh range.