Hey there,
I lost the charger for the JB3 and found an old sony charger, with same plugs to power the JB3, but it outputs 4,5v.
I vaguely remember I read last week a post about powering the JB3 with a PSP charger (wich uses the same plugs too) and 4,5v but I can't find it now.
I have no idea about eletricity, so I was wondering if I can power the JB3 to charge the batteries with that adaptor (4,5v)