Lenmar Power Anywhere kit - Unlimited Power for your Smartphones, MP3 Players, Ereaders and Other Mobile Devices 2400mAh External Battery Pack for Smartphones, MP3 players and other USB Devices (not compatible with tablets) Provides up to 2x more battery life for your phone (varies by devices and settings used) 1 year warranty Slim, lightweight battery pack fits in your purse,backpack or pocket Recharges via included micro USB cable