Mobile power supply is a collection of storage power. So when the mobile power supply is used up, boost the voltage and charge management in one portable device.
The storage medium is generally lithium battery, which is widely used in digital products, because the lithium battery is relatively small in size, large in capacity, wide in market circulation and moderate in price. Of course, the mobile power is not a disposable device, it can be used repeatedly hundreds of times more than, we must charge the mobile power. It works the same way as charging your phone