Built-in lightning MFi cable and a USB-C cable let you charge two smartphones, tablets, or other devices simultaneously 10,000mAh capacity delivers up to 31 hours of extra power to iPhones and other devices Pass-through charging lets you quick-charge one device while you're recharging the power bank - bank battery must be above 25% to support pass-through charging LED indicator light shows you when the power bank battery is getting low Compact, lightweight design makes it easy to bring with you anywhere