Swiss Mobility Swiss Mobility Power Pack SB4000-B Rechargeable Battery for iPhone, iPad, Android & other USB Devices - Black - Battery - Retail Packaging - Black 4000 mAh lithium ion battery pack Over 18 hours of additional talk time and up to 720 hours standby time 1 amp - 2.1 amp adaptive rapid charging for tablets & smartphones Battery life indicator and built-in LED safety light Compact design with lanyard slot Includes: Micro USB Power Cord, User Manual, Storage Pouch