A fully charged 10,000mAh power bank should charge an iPhone 2 – 3 times from zero to full charge, before needing to be recharged itself. It should charge most modern Android phones 1.5 – 2 times from zero to full charge. This is an economical option in the 10,000mAh space, and features a textured surface, combined with a smooth surface area on which to brand your company logo or message.