A 5-minute charge for this portable battery can fully recharge an iPhone 5

Portable batteries for charging mobile devices are great. Until they run out of a charge too. Then it’s usually hours of plugged-in time to fill the power pack back up. Not so with the Pronto: A portable battery charger that can ingest enough juice in just five minutes to completely recharge a dead iPhone 5.

pronto iphone charges

Pronto is a Kickstarter project, which comes with the usual caveats: You’re backing an effort, not an actual device so consider wisely before funding it. But the idea of a fast-charging portable battery has already taken off because the project met its funding goal in only five hours. With 29 days to go, the Pronto project has raised $93,707, which nearly double its $50,000 goal.

So how does it work? The Pronto — available in two sizes and capacities — can handle a full 25 Watts while plugged in, so it charges very quickly. Both models can be fully recharged in one hour.

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That means in 60 minutes, you can carry an additional 4,500 or 13,500 mAh of power for your phone or tablets. The USB output of the Pronto can supply a 2.4 Amp current so it can even charge the new iPhone 6 or 6 Plus faster than the standard Apple phone charger.

The smaller capacity Pronto 5 will retail for $99 but early birds can back one for as little as $69. The larger Pronto 12, which includes a pair of USB ports and a 12V jack for charging larger devices, is expected to cost $149 on the market; a $30 discount is available to early backers.