Just got the Mega eGo with 900 mAh battery and a Fast USB charger. When it finally died I plugged it into a standard wall charger KR808 with a max rated output of 0.1 A. The light was green from the first minute but the battery wouldn't charge. I also have a KR808 XL charger that is rated at 0.2 A. I'm wondering if I should just put on an adapter and use that? Am I supposed to charge from my computers USB port, or is there a wall charger specifically made to go with the Fast USB charger? I read the standard 510 charger works but takes longer, but I don't have one. Where can I get the right wall charger for the USB Fast Charger to plug into when charging a Mega eGo (900 mAh) battery?