HyperJuice External Battery 150Wh for iPad/iPad 2 & MacBooks (MBP-150) High capacity 150-Watt-hour lithium ion battery allows you to use your MacBook, MacBook Pro, or MacBook Air for up to34hours Military grade lithium ion cells, rechargeable up to 1,000 times Built-in short circuit, overcharging and temperature protection Additional high power 10W (5V/2.1A max) USB port charges any USB device (e.g. iPad/iPhone/iPod) simultaneously Includes 12-15V DC auto/airline adapter (for connecting HyperJuice to the Apple MagSafe Airline Adapter), AC power supply 100-240V