Zagg ZAGGSPARQ ZAGGsparq Portable Battery (Discontinued by Manufacturer) 6,000 mAh Lithium Polymer. Has the power to charge an iPhone up to four times. 4 yellow lights indicate power level. Has the ability to charge multiple USB devices simultaneously. Fixed output: 2x 1000mA @ 5V. 6,000 mAh Lithium Polymer Battery - Has the power to charge an iPhone four times 4 yellow lights indicate power level, 25%-50%-75%-100% Has the ability to charge multiple USB devices simultaneously Fixed output: 2x 1000mA at 5V Physical Size 3.5 x 3.5 x 1 inches - Weight .54 lbs.