Technocel's original PowerPak (and Battery Boost) were both among our stash of gadgets used at this year's CES, and they proved incredibly useful for juicing up a dead MiFi or smartphone without having to remain tethered to an AC outlet. As you well know, we're pretty big fans of external battery packs, and it seems as if Technocel has addressed the one major gripe we had with the first-generation PowerPak. The Duo is essentially the same kind of gizmo, but with a lot more oomph and double the ports. It's a squared power brick with an internal 2500mAh lithium-ion battery (compared to 1600mAh in the earlier build), and rather than having a single USB port, this guy's got two; moreover, it's far easier to look at, and is said to provide up to 7.5 extra hours of talk time to the average phone. The company also throws in a half-million interchangeable tips that are compatible with around 95 percent of handheld USB devices, and based on word directly from Technocel, it'll go on sale April 1st for $69.99.

Technocel PowerPak Duo battery charger

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Technocel's $70 PowerPak Duo battery pack doubles up on USB ports, ships April 1st