Mophie have today announced that they will be expanding the availability of the Juice Pack to the Samsung Galaxy S4, which is now available to buy for $100 in the US.

For that you get a pack that claims to add 80% extra battery to the S4, which Mophie say adds an additional 13 hours of talk time, 6 hours of browsing, 35 hours of audio playback and 7 hours of video playback.

Once used the pack can then be recharged via a microUSB port, which once plugged-in will also charge your smartphone at the same time.

Check out the video below for more information.

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