Hi, I bought Mi2 last week, and Its "eat" many power, I play games on it every day and have to charge it at less twice a day. It take ~2 hours to charge. Can someone please let me know whether it is possible to use a 5V/2000mA adapter in place of the original 5V/1000mA adapter, to speed up charging? I think 2000mA > 1000mA so It will take ~1hours to charge. I take the 5V/2000mA adapter from Raspberry Pi, It have a same miniUSB port like Mi2. Thanks.