Basically, if you don't know what you're doing, stick to the charger that comes with the device.
Electricity is so pervasive in our lives that we tend not to notice it; we press a button, flick a switch, and something in our world changes. If the change was what we expected, we don't consciously notice it - when was the last time you walked into a room, flicked the light switch, and thought about all the infrastructure in place to get the power to you, or all the hardware involved; generators, wires, transformers, switches, even the bulb itself.
What we forget is that electricity isn't a willing servant, it's a chained demon. Handle it wrongly and you can blow electronics in a fraction of a second, cause fires quickly, and injure or kill directly in a very short time.
Again, if you don't know what you're doing, don't play with it, the possible consequences range from none to minor to disastrous.
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