Huge Capacity 20000mAh: Add 8 solid charges to an iPhone 6s, or more than 5 charges to a Samsung S6, or 2 charges to a large capacity iPad 2. Smart Charge: 2.1A and 1A combined output, simultaneously charge iPhone and iPad is available we strongly suggest you to use a 2amp adapter to charge the Pilot X7 which saves much time. Compact and Durable: Friendly-use design with built-in Grade A+ li-ion battery cell, supports more than 300 charge cycles. Safety Guarantee: Built-in safeguards protect your devices against excessive current, overheating, overcharging and more. Ultra-long Product Warranty: POWERADD Offers 30-Day money back within 24-Month limited product warranty, technical and friendly customer support are available lifetime.