Flexible

Use as a standalone backup battery or attach to any Third Rail™ Case.

Hot Swap on the Go

For every day usage, we recommend that you attach one battery to the Slim Case at a time. No need to stack multiple on your case- simply swap out for fully charged ones on the go. However, for convenient charging from a single power source, you may stack your Smart Batteries on your Slim Case and charge everything from the micro USB on your case.

Feather Weight

Weighing only 1.4 ounces, the Smart Battery allows for convenient power on the go.

Universal Power Solution

Charge your mobile phone, Bluetooth headset, MP3 player, gaming device, etc. using micro USB Adapter (included).

Be in the Know

Check the battery level of your Smart Battery with the touch of a button.

Power Wherever You Are

Keep Smart Batteries in your pocket, bag, or car for convenient power anytime.

Stackable

Stack two or more Smart Batteries (additional Smart Batteries sold separately) to create a power hub or charge multiple devices at once.

Stacking Multiple Smart Batteries

Why carry around partially charged Smart Batteries? Leave the rest at home - using the Third Rail System, users can easily stack two or more (up to 4) and consolidate power to one Smart Battery to use on the go.

Share Your Power

Smart Batteries attach to any Third Rail™ Case. Share Smart Batteries among friends, family, and coworkers.

Future Proof

Smart Batteries are compatible with existing and future Third Rail™ cases, eliminating the need to purchase new charging accessories or battery cases with each new mobile phone purchase.

How is the Third Rail™ Smart Battery different from other external chargers?

Not only can your Smart Battery charge other devices via its micro USB-Out port, it can also attach to seamlessly deliver power to your iPhone 4 via the Third Rail™ Slim Case for iPhone 4.

What are the two ports on the Smart Battery?

Your Smart Battery features a USB-In port, labeled "IN", to provide charge to the Smart Battery and a USB-Out port, labeled "OUT", to provide charge to a variety of other devices.

Can I charge my Smart Battery and another device via one outlet?

Yes! By using the IN and OUT ports on your Smart Battery and included cables you can charge both your Smart Battery and another device such as a Bluetooth headset via one outlet.

What are the three gold rails on my case?

We have created the unique Third Rail™ System to seamlessly transfer power without the need for cords. When you attach a Smart Battery to your Slim Case, power is seamlessly transferred via the gold rails.

Product Dimensions

3.29 in x 1.83 in x 0.27 in; 1.4 oz

Battery Capacity

1250 mAh lithium-ion polymer battery

Package Contents

Smart Battery, Micro-USB Cable, USB Adapter, User’s Manual

Smart Battery Compatibility

Compatible with Third Rail™ Slim Case