The perfect combination of powerful and compact, the Thunder Power Bank is the ultimate in on-the-go charging. Featuring a 4000mAh internal battery, this smartphone accessory allows its recipients to charge faster than ever before. What is mAh? mAh is short for milliAmp/hours. It's a measurement of the amount of energy the battery can store. For example, an iPhone 6 has approximately 1810 mAh.
4.68" W x 2.68" H x .25" D