My DS won't charge. I don't know whether it is the battery, the charger, or something entirely different. When plugged into the wall, i don't even see the amber light go off. Of course, i didn't charge it before the battery drained (it WAS working with an R4DS prior to draining out completely), so now i have no way of knowing whether the battery or charger is at fault. It could possibly be the contacts too, but i really don't know which one to replace or fix. What should i do?