freddie, that sounds about right to me. The mAh % increase should be proportional to the % of increased usage.

RedBaronKI have used their batteries in the past with a Dell Axim X5, X50v, and Toshiba e800. They are superb products. I have always been very impressed with them. Mugen doesn't have a website that I know of. They are the OEM of the batteries and rely on other sites to sell them.