When considering backup power for mobile devices, consumers typically have two choices: a portable battery that can charge multiple devices or a charging case, which is more convenient but usually works with only a single device.
Innovative Technology, a maker of gadget accessories, thinks consumers should have both. The company's Justin Power Case, which is designed for the iPad, has a built-in battery that can charge the iPad and other gadgets, including iOS, Android and BlackBerry devices, at the same time.
The company says the rechargeable battery in the Justin case can charge an iPad twice or an iPhone seven times on a single charge. That high-capacity battery makes the case ideal for travelers and others who use their devices for long periods.
Charging is a little slow, however. It took me a few hours to fully charge my iPad, a bit longer than the process takes with a wall charger. Four tiny LEDs inside the cover let you know how much charge the case has left.
The synthetic leather exterior of the Justin case is not particularly handsome, but it's durable and offers good protection and a nice grip. The iPad slides easily into the case through an interior opening near the hinge, and a magnetic flap keeps it securely in place. An integrated kickstand can be used to prop up the iPad in portrait mode.
The trade-off, however, is that the case is bulky, doubling the thickness of the iPad, even with the "ultra-slim" model. And the case does not activate iPad's automatic shut-off when the cover is closed.
The Justin case comes with a micro-USB cord and a wall adapter for charging, but not a cord with a 30-pin connector to attach to the iPad, which would have helped immensely. Still, at $70, the Justin case provides a long-lasting power backup at a decent price.
This article originally appeared in The New York Times.