Battery Indicator on RF Explorer 3G Combo

I just received my RF Explorer 3G Combo yesterday and I’m very impresssed! It works just as advertised and will make a very useful addition to my tool kit.

One question: After charging the battery overnight with a USB charger capable of 5V @ 1A the battery indicator still shows only about half full. I have not tried to see how long the battery lasts in order to determine if it’s a problem with the battery or just the indicator. I’m running firmware 01.11B2. Any ideas?