Default [Q] Help recovering XT910

Hi,
about a month ago, I managed to brick my XT910 - I was doing factory reset when I had couple of images installed (using safestrap).
The Battery went dead, as it entered a bootloop which I didn't notice.

I ordered a "Factory Cable", and now I'm able to use AP Fastboot recovery to flash a new image (4.1.2 image). As long as I'm connected with the factory cable to the computer, everything seems OK (flash succeed, I can go and setup the new system, connect to wifi...).

But - the battery never charges. As soon as I take off the factory cable, the phone dies. When I'm connecting regular charger, or regular USB cable to the computer, I get the red circle "M" logo, but it never progress - not booting and not showing the battery image.

Any idea how to solve this?

Thanks,
Ilan