GreatShield PowerTank charges up to two devices simultaneously with its dual 1A and 2.1A charging ports for 3.1A total output charging ability. Made with an aluminum casing and weighing in at 10.5oz and only 0.85" thick, the lithium polymer PowerTank supports over 500 charge cycles. It made with a built-in short circuit, over charge, and over-heat protection.With 10400mAh capacity, your battery life will be extended by:Apple iPhone 5/5S/5C/4/4S: Up to 5x complete charges HTC One, Samsung Galaxy S4/S3: Up to 3x complete charges Samsung Galaxy Note 3/2: Up to 2.5x complete charges Apple iPad 4/3: Up to 0.7x complete charges Apple iPad 2/1: Up to 1x complete charges Apple iPad Mini: Up to 1.5x complete charges Apple iPad Mini 2 with Retina Display: Up to 1.15 complete charges Google Nexus 7: Up to 1.75x complete chargesGreatShield 12 month Limited Replacement WarrantyProduct Specification:Capacity: 10,400mAh Maximum charging current: 1000mA - 1200mA Storage temperature: -5F - 110F Output: 5V/2.1A & 5V/1A Input: 5V/1A Size: 4.33x3.13x0.85in Package includes: GreatShield PowerTank, Micro USB Charging Cable, Microfiber Pouch, Instructions (Charger/Adapter is NOT included)Compatible with: Apple - iPhone 5/5S/5C, 4/4S, iPad 2/3/4 mini 2, iPod Nano, Touch 4th/5th Generation (Lightning and 30-pin cables not included) Samsung - Galaxy Note 3/2, S3/S4, S2 Skyrocket Google - Nexus 4, 7 & 7FHD, 10 HTC - One M7, M4, EVO 4G, Thunderbolt, Incredible, Droid DNA Motorola - Atrix, Droid, Moto X Sony - Xperia series Nokia - Lumia series LG - Optimus series And More!NOTE: NOT compatible with Asus Transformer tablets and Galaxy Note 10.1