HyperJuice External Battery 222Wh for iPad/iPad 2 & MacBooks (MBP1.5-222) High capacity 222-Watt-hour lithium ion battery allows you to use your MacBook, MacBook Pro, or MacBook Air for up to45hours 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 Connection to MacBook not included. If you need to connect to MacBook, please consider HyperJuice 1.5 (222Wh) + Magic Box DIY (sold separately)