So you (and 20 million others) bought a shiny new Galaxy S4 and love it to death, but the included 2,600 mAh battery just isn’t cutting it. Sure, four hours of video streaming, eight hours with moderate usage, and 17 hours of talk time sounds like a lot, but what if you want to browse the web a little bit longer? Don’t worry, friends, because Mugen Power’s got you covered. The aftermarket battery company revealed today a 5,500 mAh extended battery for the S4, a power solution with more than twice the capacity of stock. Needless to say, it’s a beast.

According to Mugen Power, the Galaxy S4 extended battery will more than double battery life. If you limit your smartphone usage to the occasional app install, e-mail reply, and website browse, the company doesn’t think 3-4 days of power is an unreasonable estimate. The best part? You don’t have to worry about compatibility or sacrificing functionality; the Mugen Power battery matches the stock battery’s voltage, and the cover includes an NFC coil for near field fun.

Mugen Power plans to ship the Galaxy S4 extended battery in late July. It’ll retail for $89.50, and backplates will come in black and white.

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