Third Rail Trio Slim Prot... has been added to your Cart
+ $0.00 shipping
Used: Very Good | Details
Sold by Seller1ON1
Condition: Used: Very Good
Other Sellers on Amazon
Add to Cart
$49.95
+ Free Shipping
Sold by: Creekle
Add to Cart
$51.66
& FREE Shipping. Details
Sold by: Amazon.com
Add to Cart
$51.95
+ Free Shipping
Sold by: Bigga Buys
Have one to sell? Sell on Amazon

Third Rail Trio Slim Protective Case and Fuel Universal Rechargeable External Smart Battery Combo Kit for iPhone 4 and 4S

2.9 out of 5 stars 53 customer reviews

List Price: $89.99
Price: $51.21 & FREE Shipping. Details
You Save: $38.78 (43%)
Only 1 left in stock.
Sold by ONLINE MEGA CENTER and Fulfilled by Amazon. Gift-wrap available.
  • Universal power solution to charge 100s of devices (mobile phones, Bluetooth headsets, MP3 players, MiFi Cards, gaming devices, etc) using the included adapter cable; Up to 6 Smart Batteries can be stacked together, creating a power hub that allows you to charge multiple batteries and devices through one power outlet (AC or PC)
  • Contrary to bulky traditional power cases, in conjunction with any Third Rail Case, the Smart Battery can slide onto case when you need power and slides off when you don't
  • The low profile and feather weight (1.4 ounce) Smart Battery is one of the most compact charging solutions on the market, making it perfect for on-the-go power
  • Innovative Third Rail technology allows Smart Batteries to be stacked, automatically consolidating available power among partially charged Smart Batteries
  • Easy-to-read indicator lights let you check the battery level of the Smart Battery with the touch of a button; Contains a 1250 mAh Li-Poly Battery
  • Thinnest battery-enabled case on the market
  • Universal Smart Battery slides onto case when you need extra power, slides off when you don't
Show more
4 new from $49.95 2 used from $21.95
$51.21 & FREE Shipping. Details Only 1 left in stock. Sold by ONLINE MEGA CENTER and Fulfilled by Amazon. Gift-wrap available.

Technical Details

  • Size (LWH): 5 inches, 0.8 inches, 2.4 inches
  • Weight: 2.24 ounces
  See more technical details

Compare to Similar Items


This item: Third Rail Trio Slim Protective Case and Fuel Universal Rechargeable External Smart Battery Combo Kit for iPhone 4 and 4S
Customer Rating 3 out of 5 stars (53) 3 out of 5 stars (95) 3 out of 5 stars (206) 3 out of 5 stars (353)
Price $51.21 $35.47 $20.11 $69.99
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By ONLINE MEGA CENTER Long Run Technologies USA Amazon.com Rally Bargains Inc
Compatible Phone Models iphone 4;iphone 4s iPhone 4 Apple iPhone 4 Apple Iphone 4
Color Black Black black Black
Add to Cart Add to Cart Add to Cart Add to Cart

Please help us improve this feature. Tell us what you think of this feature.

Product Description

From the Manufacturer

Providing the ultimate 3-in-1 mobile solution, the first of its kind Third Rail System features a super slim protective case, a convenient and optional power case when needed, and a universal external charger for 100s of other devices. Contrary to bulky traditional power cases, the System lets you decide when/where/how to add on-the-go power. This may be the only mobile charger you ever need.

Third Rail System
The Slim Case is the thinnest battery enabled case on the market

Third Rail System
Traditional power cases add bulk, even when you don't need the extra power

Ultimate Flexibility

Daily power use may vary and your solution should vary with it. Contrary to bulky power cases without removable batteries, with the Third Rail System you have the flexibility to add additional power only when you need it. Have another device that needs charge? The Smart Battery also doubles as a backup battery for hundreds of other devices.

Third Rail System
An everyday protective case with a slide-on Smart Battery for extra power. View larger

Third Rail System
Durable hard-shell protection with access to all iPhone 4/4S features. View larger

Unlimited Power

On those extra long days, don't fall victim to the limitations of ordinary power cases, the Third Rail System gives you the ability to swap on and off multiple batteries (sold separately) for longer periods away from outlets.

Share your Power

Feeling generous? The Third Rail Slim Case is compatible with all Third Rail Smart Batteries so you can easily share Smart Batteries among family, friends, and coworkers.

Complete Coverage

Durable hard-shell protection with a soft touch coating provides access to all iPhone 4/4S features. The soft touch finish also helps prevent the phone from slipping out of pockets--a major cause of lost or damaged iPhones.

Power Hub

Using one outlet, you can charge both your iPhone and your Smart Battery. Simply plug the included Micro-USB cord into the USB port on the Slim Case, attach a Smart Battery and charge on. You can even charge other devices (i.e. Bluetooth headset) via the USB-out on the Smart Battery using the same outlet to create the ultimate power hub.

Future Proof

The Smart Battery will work with all future Third Rail cases. So, as you upgrade devices, you just pick up the appropriate Third Rail Case and continue to use your Smart Batteries--good for the environment and great for your wallet.

Universal Power Solution

In addition to charging your iPhone 4/4S, the Third Rail Smart Battery also doubles as a universal charger for hundreds of other devices such as smartphones, Bluetooth headsets, MP3 players, gaming devices, and Mi-Fi Cards.

"Works with iPhone" Certification

The Third Rail System is officially certified as a "Works with iPhone" product. This ensures that 100% compatibility with your iPhone 4/4S.

Works with iPhone Certified

What's in the Box

Third Rail Slim Case for iPhone 4/4S, Smart Battery, Micro-USB cable, USB adapter, user's manual.

Third Rail System Comparison

Third Rail System
Easily swap on and off multiple batteries (sold separately) for longer charge periods
Third Rail System Power Cases with Non-Removable Battery
Yes Multi-use and flexible solution No No user flexibility
Yes Add battery for on-the-go power No Cannot remove battery between uses
Yes Battery can be used to charge hundreds of devices No Only charges iPhone 4/4S
Yes Smart Batteries are compatible with all future Third Rail cases No Model Specific--have to scrap entire solution with each new phone purchase
Yes Batteries can be shared with other users No Can't share battery with others
Yes Fore longer use, swap dead batteries for charged ones No When battery dies, users are left with a useless brick
Yes One plug power hub charging for multiple batteries and devices at once No No power hub capability--limited to charging only the battery and iPhone 4/4S