Power banks

Power banks are portable power sources used to charge battery-powered items such as mobile phones and other similar items with a USB interface: they can charge via USB, etc., or wirelessly. 

It's a portable charger that allows you to recharge your electronic devices while you're on the go. 

A power bank can be small enough to fit in your pocket or large enough to hold more data.

Power banks are also used to recharge Bluetooth speakers, Bluetooth headphones, and other types of charged headsets, among other things. 

It is recommended to charge your power bank at least once every three months to keep it in good working order. Though there is no hard evidence, it is generally recommended that power banks be charged only up to 80 percent and discharged only up to 20 percent for superior performance and longer lifetime.

A good power bank should include circuitry to regulate the output voltage, so the vast majority of power banks are safe to use with your iPhone. The new MagSafe product, on the other hand, can be used as a power bank for Apple devices. It simply latches onto the device's magnets and begins charging it.

Wireless Slim Power Banks, like a wireless charger, charge your phone without an input cord. A wireless power bank contains charging coils that generate energy and a battery that stores it. It's more like a portable wireless charger for when you're on the go. It is capable of two-way fast charging from the ports. It takes approximately 4 hours to charge the power bank from 0% to 100%. You can also charge wireless buds and other accessories with this power bank.