Or have you had this issue?
Nikon Camera Users Say Third Party Batteries Are Duds After Installing Latest Firmware
Man, it must not be a nice feeling at all to know that after installing the latest firmware version on your Nikon digital camera, you realize that …
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That sure would be a dirty trick on Nikon's part if true. I've been using a third party battery in my D7000 with no trouble but I've not done any firmware upgrades.
Hmmm…interesting.