Hi everyone, I want to attach a Meike battery grip to my a100 camera. So I need to extract the battery cover of my camera, unscrewing as little screws and doing as little bad as possible. I feel it's a question of pushing a lever or a little spring, but my imagination doesn't help me, so far. The best would be to consult a service manual. Could anybody help me? Best regards and thanks in advance. DimiPOPA