Now it is charged for 12 hours. But there is still BAT sign on powercontrol screen and minus (-) sign on bottom right corner of display. Display stays on for about 30 seconds, then it turns off, but comes back when any button is pressed. But buttons don't do anything else, powercontrol shows only this basic screen with date and time (which is not running, like it did when charged). And computer still won't recognize powercontrol.
I understand that charger could fail with use, but now it seems that powercontrol is also faulty in someway, so it seems that i was bluffed when i bought this?
Edit. Plugged it to charger again, now battery sign flashes and there is + sign, so it charges. And now all the functions seem to work....maybe I leave it on charger for a while and then check again. Still it seems that this is not normal...and it is little bit hard to use if it needs to be plugged in while used
edit # 2. Now after a little bit of charging, everything seems to be working ok. It connects to computer like it should and cadence is showing when i move power sensor behind the crank. Hopefully everything goes fine after this..