Let's see if I remember this correctly, read somewhere that if the charger/adapter output is greater than the device , then it should be fine . May not be optimum and may cause damage internally (ie. Battery, circuit) if prolong usage.

DANGER : output is lower than device recommended specs. This will cause the charger to work 'harder' to meet the difference . Hence, may cause an explosion if prolong usage.

Best is to use the device's original charger .

Can someone explain what's a...

1. piston

2. Mikey

Thanks in advanced.

If you are fine with the prospect of losing all your data without any backup, then sure.