Hi
My nokia770 with 2007HE never says charge is full.
Howsoever i charge it (maybe 10-12 hours), it doesnt says charge is full.
How can i solve this problem???

Never? Mine, too, is very sparing with that message, even though it's plugged in 3/4 of the time I use it. But every once in a while I see it.

You could try recalibrating the battery by depleting it until the device shuts down, then recharging it completely in one go, but I'm not sure that trick works on the 770 (it works on certain laptops).

I have a N770 with the Hacker Edition installed and mine does the same thing. I finally unplugged the charger and then plugged it in again and it said battery was fully charged. It will not ever say battery is full unless I unplug and reinsert charging plug????

Yes, mine also...previously it (2006) worked so I think it is the software (2007HE)...more important is that it does show the amount of battery left so I do not think anyone would spend any time fixing this issue...unless they do 2008HE...