Wow, I'm impressed by your 511A capacity. Something is wrong! heheheh
Do you use the LCD
monitor often? Do you take many photos with flash? These 2 devices drain too much power from the batteries.
I have an old BP
-511 and a new BP
-511A. The old 511 lasts a whole HARD day of spotting (say, using it all day from sunrise to sunset, taking about 250 pics, and using the LCD
to review all them and delete the bad ones, and at the end of the day review them at home). The new 511A must have 2 times the capacity of the old, is incredible... But still it doesn't lasts 2 months for me