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Message: <blockquote data-quote="nickt" data-source="post: 547423" data-attributes="member: 4923"><p>I use the  c and d spacers for some gadgets I have. They are not real power hungry devices that I use them in. I haven't looked a rechargeable c and d cells in years, but there was a big difference in some. Many of them were simply a AA cell with a permanent, mostly empty spacer around them. You can tell what is in it by the mAh - milliamp hours. That's how much current it can supply for one hour. if you look at a D cell and it is 10000mah, that's got some 'stuff' inside. If it is in the range of 2500mah, then there is just a AA cell hidden inside. The spacers can be a pain sometimes though.</p></blockquote><p></p>