I love these cameras but just in case anyone else experiences this:
I bought 2 of these little beauties recently (1 for me, 1 as present) and oddly one of them just would not charge it's battery.
Every time I tried there was a flashing red light and a tone. The back panel said "check battery connection". I would unplug then try again. The same thing happened. So after a little research I found out 2 things:
1: try not to use a USB hub and plug directly into the powered USB ports on your PC even if it leaves the camera suspended upon high!
2: If previous one doesn't work then
(i) take out battery
(ii) plug camera into USB
(iii) when the camera says "connected" insert the battery
(iv) Use "safely remove hardware" function and detach camera from USB
(v) Re-insert camera into USB
(vi) Should now charge without trouble
Both these solutions seem to work and now charging is not a worry but I can't guarantee anything. (The second solution is direct from "Flip" themselves. I found the use of a "hub" was more of an issue for me but their solution worked too.