I spent hours and hours on this problem, hooked up multi-meters, and this is the solution:
6.1 is a battery drain on the 6700. Period. Something in there is keeping the battery ticking and draining.
6.0 does not do it, 5.0 does not do it.
I've had a multi-meter on the 6700 on the "sleep" state and it is 24mAh with 6.1. THAT IS ALMOST AS HIGH AS IT BEING ON WITHOUT THE BACKLIGHT!
So here's what I did. I got a 6800 and started doing the exact same tweaks as I did on the 6700. The battery life lasts over 3 days with nominal usage. The bottom line?
Call your carrier and upgrade your phone with insurance for $50 or what have you to get your hands on a 6800. It is so much better - plus gps, thinner, brighter backlight, and BATTERY LIFE is A++++.
I thought I would give my last 2 cents as I ship this 6700 back to the insurance company.
So goodbye Apache forums, you will be missed. (the headaches over the battery will NOT be, however.)
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ps.
http://forum.ppcgeeks.com/showthread.php?t=28496