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Battery died after being used six times
on 13 May 2013
The battery worked fine for the first five times that I used it. Then it went completely dead. The fault lies with the battery because the original battery that came with the camera continues to work perfectly. So my experience echoes those of several other users.
I reported it to the problem to the vendor i-connect, but they have failed to respond despite my writing to them three times. I am having to pursue them via Amazon.
There does seem to be a problem with the reliability of the battery, which is surprising for a genuine Sony product. Unfortunately you often need a battery of this size for long shoots. I hope that the matter has been reported to Sony and does not just sit on the pages of Amazon customer reviews.