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The Third Rail System for iPhone 4 and iPhone 4S is the ultimate 3-in-one solution. Featuring a slim protective case, a convenient way to power-up on the go, and a universal battery that can charge hundreds of USB-powered devices, it’s a must-have for any iPhone 4/4s owner. The Third Rail System means you can say goodbye to bulky traditional power cases, adding power only when you need it.
Contrary to bulky, traditional power cases, the Third Rail lets you slide the Smart Battery onto the case when you need it, sliding it off when you don’t, leaving you with a case that’s as thin or thinner than many protective cases out there. It feels great in your hand, with a beautiful finish and a high-quality, soft-touch feel.
You don’t need to build the Third Rail System, it comes with everything you need in the box. The Slim Case, Smart Battery, and a universal cable that will charge hundreds of USB compatible devices are all there, saving you time and money.
Having a Smart Battery on hand is good, having multiples? Even better! Each battery only weighs 39 grams… and you can have multiple on hand during long periods away from the outlet for unending power. Stack them alone, and they’ll automatically transfer power from lowest to highest, consolidating power for longer-run battery life. You can stack up to six batteries this way, and you can even charge the whole stack via one micro-USB in, too!
With the Third Rail System, your Smart Batteries really are universal. When you upgrade to a new device all you have to do is upgrade to a new slim case, and use your existing batteries. It’s good for the environment and great for your wallet!
The Third Rail System for iPhone 4/4S is the power solution you’ve been looking for. Stay sleek, trim, and bulk-free when you want to, and add power only when you need to. The convenience of stackable smart batteries, and the ability to use them as a universal power supply for USB-chargeable devices makes it the only power system your iPhone 4 or 4S needs. When you’re ready to upgrade, the Third Rail System will upgrade with you. Just add a new case, and take your Smart Batteries along for the ride!
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