MiLi Powerspring Adds Life to iPhone 4 Batteries

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One thing about the iPhone 4, it’s a great phone, but it can chew through batteries like no tomorrow. So there’ll always be some demand for ways to quickly supplement your iPhone’s juice levels, and that’s where the MiLi Powerspring comes in.

The MiLi Powerspring is, essentially, an external battery pack that slips over the iPhone casing and plugs in, thus allowing a separate resource for the iPhone to draw on. In fact, it’s specifically designed so that the iPhone drains its own battery first, and then switches to the MiLi Powerspring, making it a true backup battery.

And it’s a pretty healthy backup battery, too–it’ll offer between 6 and 36 hours of battery power, depending on what the resulting power is used for (because as we all know, different functions need different amounts of juice to sustain), and yet it’ll do all this on just four hours of charge. You can order these direct from MiLi for about $80 (54.99 pounds sterling).

So if you’re looking for supplementary power for your iPhone, you’ve got lots of options, and now you’ve got one more in the MiLi Powerspring.