I have a Windows Mobile Pro phone and it does the same thing so I think it's more of a Windows OS issue. I view the battery animation as just an indication that there is a charge going to the device and only look for a battery level after I remove the device from the base.

I'm not sure I understand why it's bothering you? Is it a pet peeve or are you experiencing battery problems that you're trying to troubleshoot? If it's a pet peeve... I'm with you... I wish there was a way for all electronic devices to adopt the same logic because when something behaves out of the norm like this it can be frustrating. If you're having battery concerns and you're looking to the screen for info than I think the only right answer is to call UEI techs.