The iPhone 4 Battery Pack that Doubles Battery Life

Even though Apple has worked hard to improve the battery life of its newest iPhone that's still not good enough for some demanding users! Now help is at hand, as you can double the battery life of your iPhone 4 with the Mili Powerspring 4 clip-on battery pack.

This battery pack from Mili will set you back £54.99 and provides an extra 1600 mAh of power.


The manufacturer claims it'll double the battery life of your iPhone. Plus, for once, it won't spoil the design of the handset either as Mili also claims the Powerspring 4 is the slimmest add-on battery pack around.



It looks like you'll no longer have to sacrifice style to boost your talk-time.

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