If it's anything like a MotoDroid (and I believe it is), probably not.
The MotoDroid only -reports- in 10% increments and there doesn't seem to be any way around it.
even if you find an app that does it, it won't be any more accurate. accuracy is the largest complaint on all of the apps i looked at a while back. i stuck with the stock battery indicator. it would be nice....but i can live with seeing 50% instead of 53%. even if it was deadly accurate, you are talking about estimating a few minutes.