LB1 High Performance New Power Bank for Acer C720 Chromebook 10500mAh Pocket-friendly Premium Portable Charger and External Battery with Universal Compatible Dual USB Ports Charger 1A/2.1A (Black) Capacity: 10500 mAh | 2 USB Output - 1A and 2.1 A | Dimension: 5.6 x 2.8 x 0.6 IN | Weight: 0.5 lbs | Certification: FCC / CE / ROHS | Compatible with all 5V input USB mobile device. Sleek, stylish, pocket-friendly, creative design (Only 0.6-inch thickness and 0.5 pounds in weight) and about the same size as iphone 5S. This Portable Power Bank is everything you expect in a premium portable backup battery charger, beautifully crafted to fit perfectly in the palm of your hand. High Quality and more powerful, reliable external battery portable charger. This portable charger and external battery was designed to power two USB devices simultaneously with super high-output charging speeds. As Always, Premium Quality - Uses the best grade A lithium polymer battery to ensure the real 10500mAh capacity. (100% Real Capacity Guarantee). Built-in: Short circuit, Over-charge, Over-discharge and Temperature protection. 100% Customer Satisfaction. Fast Same-Day Shipping by 12:00 PM PDT. 30-Day Money Back Guarantee. 18 Months Warranty. Exclusive $100000 Product Protection Plan! Satisfies Government-School-Health care enterprise and Corporate account purchase order requirements.