Does the battery light flash when plugged in but not booted? Have you tried a different battery?
If you have a different battery, install it and see if it is the same. If it flashes, I would think the batteries are okay, might have a problem with the Mk2.
If the battery light does not flash when the unit is plugged into AC and not booted, but flashes once the OS is/has loaded, I would say that something in the power management software does not play well with the hardware. A proper install w/drivers might solve the problem.
Life's Journey is not to arrive safely at the grave in a well preserved body, but rather to skid in sideways totally worn-out shouting 'Woo Hoo! What a ride!
Motorsports - the only real sport. If it doesn't have a motor, it is just a game.
There is always something waiting at the end of the road, if you are not willing to see what it is, you probably shouldn't be out there in the first place.