> 1.2AH although the manufacturer says 3AH

Remember that the AH figure is often quoted at a maximum current draw, and
if you run at higher than that current the AH figure drops. I suspect that
this is why you see only 1.2AH at 120ma draw. I would not expect to run a
camera battery at this current continuously.

It would normally expect to see about the current you will need to get down
to, while in a camera. I guess this is why you are seeking to use this
battery :)

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