Reliable, safety-tested and certified portable power where and when you need it. Reserve Power Banks deliver safe, dependable power. This compact 2600 mAh battery is the perfect size and capacity for charging your smartphone or smartwatch. Charge On The Go - UL-tested and certified Li-Ion batteries recharge from any wall charger, car charger or laptop/PC. Then connect your Lightning cable – or the micro-USB cable that ships with each Reserve Power Bank – to recharge your smartphone or wearable. The standard USB port delivers 5 watts of charging power (5 volts at 1 amp) for fast, safe charging. LED power gauge shows the battery"s charge capacity with the push of a button. Slides easily into any pocket, purse, back or backpack so you"re never without power. More Power to You – How far will 2600 mAh take you? Smartphone - Up to 1 extra charge Smartwatch - Up to 8 charges That"s enough to keep your phone or wearable powered up wherever your day takes you*. Built & Tested for Long, Reliable Life – Reserve Power Banks" safety-certified Li-Ion cells are secured inside a drop-tested, durable polycarbonate shell. Built-in power management circuits prevent the battery from overcharging, and from charging the attached device at a rate faster than it can safely handle. *NOTE: Actual performance will vary. Capacities are estimates only, based on the average battery capacities of top-selling Apple and Samsung devices. See your device"s owner"s manual for power requirements.