[suicideneil]

You could get a a larger battery pack and hook it upto your dremel, say a ~12v item that uses decent cells (A123 or generic versions there of), but making it AC powered is impossible essentially. As for your your charger in need of a power supply, look up AC/DC power supplies to understand how they work; basically take 110v of AC (alternatiing current) and turn it into some useful DC (direct current) voltage, usually 12v or so, which is what your charger needs to function.