how to deal with the power off of Samsung S2? when I use the phone for a long time later, it always doesn't own the enough power,and this is confuse me sometimes I feel boring. I don't know if you also have the same situation. But in near days, some of my friends bought the external charger for Samsung they said you can use this charger to charge the phone anytime anywhere. So I want to know if you also have the problem of the power?