Originally Posted by John Bean
The battery monitor "guesses" the percentages based on the spec of the original Motorola battery. Is your new battery from a third-party generic manufacturer? If so all bets are off.
I have two that were cheap and cheerful but behave much like you describe; sometimes you get what you pay for.
I believe the battery is DOA. If the battery was brand new with the phone when you got it, you should take it back and they can DOA the battery. If they give you a hassle get tough with them as it costs them nothing to DOA it! Standard DOA policy is 30 days, if its over that maybe you can sweet talk them before you get tough with them lol