Also, one of the batteries has become a bit flaky, in that on occasion the blue button doesn't light, has a slight delay before lighting, or it lights for a second or two and then goes out. Fiddling with the button (slightly rotating it or pressing it from a different angle) has worked so far...
Welcome Bunker Boy, and congratulations!!! Both on the GoGo and the subsequent kicking of the analogs!!!
As far as your battery button flaking...try running the battery ALLLL the way down until it's completely dead and then recharge fully. I don't think it's a proven fix, but more than a few have noticed the issue goes away after a full deep cycle.