Lenmar Revv 2500 mAh 1 USB Port Power Bank External Portable Charger Battery Pack for Charging Batteries of iPhone 4 5 6 6 Plus Android Galaxy S5 S4 S3 Note 3 Note 4 Phones and other USB Powered Devices with Micro USB Cable, Black 2400mAh Portable Power Pack with 1 USB Port for mobile phones, MP3 players and other USB Devices (not compatible with tablets) Use your mobilephone up to 2 times longer* Slim, lightweight battery pack fits in your purse, backpack or pocket Recharges via Micro USB cable (included) 1 Year Warranty *Varies on device's settings, usage, and battery capacity