4. The practicability of getting E06 recharged by using a wall adaptor directly.

A: Due to the USB power supply's stability, it is suggested to get the A1 recharged by connecting the USB cable to computer.It may influence the battery's lifetime if using a wall charger to get the unit recharged directly.  But when there is no other option but using this method, pls make sure the adaptor's DC is 5V and the currency is above or equals to 500mA.