battery charging problem

[warhawk]

Hello!

I have equipted the a20 board with a 4500ma battery that is tested to be good. The board charges the battery fine and with a full charged battery I can "get" 7 hours of it.

After 7 hours the bat protection kicks in and the board powers off. Then I connect the charger and the board powers on and starts charging the battery. So far so good.

The problem is that when charging reaches about 80% the charging led starts to flash and the board stops charging the battery. If I disconect the power adapter for a second and then I reconect it the board starts to charge the battery again until 100%.

Any ideas?