Keep your devices charged on the go with the Anker Astro E1 Power Bank. It's available in a sleek black color that will fit in well with other electronic accessories. It has a compact design that allows you to take it with you wherever you go. This cellphone accessory can be stored in your pocket, purse, bag or backpack for easy travel. It works with both Apple and Android devices. It also boasts PowerIQ amp-adjustment technology so it can deliver just the right amount of power so it won't overload your device. It boasts 5200mAh of power to fully charge most phones, tablets and more.