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I took the plunge and got one of these ginormous batteries for my phone. I don't mind the bulge and it capacity is amazing.

One thing though:
Apparently the phone still thinks the factory "extended" battery is installed. I will get a low battery warning. If I remove the Mugen and pop it back in, I suddenly have 70% battery left.

I am running Battery Doctor on a rooted C811. I wonder if the app has something to do with the premature low battery warning.

Does anyone know how the phone senses the maximum capacity of the battery?
 
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rdwilson - I emailed and asked Mugen about this: they said it's firmware dependent and assured I would have no problem with my M020. The battery hasn't arrived yet so can't confirm.

Mine's a stock M040 build. I'm hesitant mainly for the price, but the thickness of the 2920 battery is about a quarter inch beyond the standard battery. I'm wondering if 3/8 inch will fit in my pocket . And the weight difference between the 1800 and 2920 batteries is substantial. Can someone comment on the weight of the 4800?
 
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Used mine for 2 weeks and love never having to worry about battery power regardless of what aI use the phone for. The remaining power percentage is completely useless though and is not getting more accurateas the instruction indicated it would. There's always a price to pay. I use mine with body glove and cut out the bulge hole with a sharpie. All good. Wish the power level was correct but still totally worth it.
 
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