Recently bought a compatible BP 422 (highest capacity) battery for my new Canon MVX10i but am having problems with getting it to charge via my camcorder. I tried both the Hahnel and Frameart versions and have given up with persevering (I had a very understanding dealer who first swapped the battery for a different one and secondly offered a refund) . I did speak with Hahnel who told me they had not tested the compatibility of that specific camcorder with their 422 equivalent. The camcorder does not seem to have any problems with the official Canon battery (which I have charged and recharged a few times now). Just wondering whether this was a regular problem with compatibles (i.e. they are not always as compatible as it seems) and whether anyone can recommend a reasonably priced supplier of official Canon batteries.