I've purchased 12 batteries for the Canon 20D and 10D over the last several years. All but the 2 of these came from SterlingTek and I paid $11.95 each. They are the 1800 mha ones and they last longer than the two Canon batteries I have. I have never had a spot of problem with any of them. All of them are still working. The first 5 include 2 Canon and 3 SterlingTek batteries. They all seem to still hold a full charge. It makes no sense to pay $50 plus for one of these batteries because for that price you can get 4 of the OEM batteries.
Cheers,
rfs
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