Thank you. That's actually the answer i was looking for! This said it all...
hey, sorry if i answered late and someone already said this. you can use an original DS charger, or any gba sp charger, they are the same, just the DS LITE had is own charger, and the DSI charger is used up to today (even 3ds xl uses the same charger as the DSI)
and foxi said one inportant thing, you must pay attention to input voltage, since some chargers are not designed for other countries voltages... in europe for example we have 220-230 volts ( i think sometimes it can get up to 240) and usa uses 110...
most devices today are more universal (they say "110-240v~" but on some cases for example my DS LITE, or 3ds charger input is 220-240 volts 50-60hz...