Join the UNU family, an innovative, award-winning brand from silicon-valley, featured in New York Times, Mashable and CNET. All UNU products are backed by hassle-free 1-year warranty. POWERFUL CHARGING OUTPUT – featuring 2.1A " uSmart" technology, the Superpak portable charger is compatible and optimized to provide maximum charging speeds for any phone, tablet and USB powered device. SAVE TIME RECHARGE – Featuring UNU exclusive charging technology SuperX, the Superpak iPhone Powerbank can be recharged within 3.5 hours, at a rate up to 2.1A, reducing charging times by to 50%. COMPACT & POWERFUL – World&rsquo s smallest 5000mAh micro-battery pack provides 2 full charges to iPhone 6 (small screen) as well as 1.5 charges on the iPhone 6 Plus and Samsung S6 (large screen). APPLE CERTIFIED – Bundled with an exclusive 2-in-1 micro-USB / Apple Lightning cable (Apple Labs Certified) for universal charging for almost any portable device.