Hi,
I have connected a wall USB charger (only power, no data wires) to my Fuze v2 and left it overnight. When I have took the DAP I've realized that battery was weaker than before!
When I connected power the DAP was in off state, then it automatically powered up with the Sansa op. system. If I charge from a computer it works without any problem
If i manually power on the FUZE with the Rockbox op. system it charges regularly. Do I have ever to turn on my DAP before charging the battery with a non communicating battery charger?... Uhmm...
Do you think I have to do some further tests?...