[maemo-users] [maemo-users] External Battery for 770?

[From: smartkenny]

Hello, everybody

Is there anyone who knows where can I buy an external battery for 770? I 
bought a generic external battery from global-batteries, but it turns 
out that 770's power supply is special and the external battery can't 
make 770 work. I guess there's some kind of communication between the 
AC-4U and 770, so normal external supply won't work at all.

I really need an external supply which can independently provide power 
to my 770.

Thanks for any suggestion.