Buy it on Amazon: http://boxvimo.com/affiliate-link/

One of the essential accessories you should have is a usb-ac adapter.

I have several of them and can tell you that having such an accessory will save you time and money.

A usb-ac adapter charges from your wall outlet. This is perfect because if you're using this you can re-charge your phone, tablet, laptop (hybrid), external battery, or Bluetooth accessory in ½ the time that you'd need if you plugged it/ them into your computer's usb port or a high-capacity external battery.

Arctic's 4-port is one of the better one I own because the charge outlets are stronger and faster than the generic ones I own.

** Ports **
2-- Standard Ports (black)--accessories, cellphones, headphones
2-- Higher Charge ports (orange)--tablets, phablet, external batteries, hybrids

Each port has an individual surge protection and has a maximum output of 4500 mA, by a shared 5v output.

And, one of the best things about this particular unit is that the unit draws no house current until a unit that needs charging is plugged in. After a unit has reached its charging capacity, the unit's charging light will turn itself off.