The X-Power 1 might look like just an ordinary charging cable for your iPod or iPhone but hidden along that cable is a small battery. This inline battery is about the size of a AAA battery and can actually hold a charge on it’s own allowing you to charge up your device straight from the cable even if it’s not plugged in to a computer.
So we’re basically talking about a lithium ion backup battery combined with a charging cable. It totally makes sense to combine the two, especially since the battery doesn’t take up a whole lot of space on the cord. That’s one less thing to carry around. It costs $30 and comes in 6 inch, 20 inch, and 30 inch models in black or white. Sure the small battery isn’t going to give you as much juice as some of the larger power packs you see but if you’re carrying a cord around with you anyway, why not have a spare battery (especially since the iPhone/iPod batteries are non-removable.)
x-power1 via gadget review
Casecover Universal Micro USB 3M 10FT Colorful Fabric Braided Data Cable Micro USB Data Sync Cable Charger Charging Cord for Android Samsung Galaxy S2 S3 S4 Note 2 HTC EVO One X S (1 black)
Adoric 3Pack 10FT/3M Extra Long Nylon Braided Lightning to USB Sync Charge Cable Cord Charger with Aluminum Connector for iPhone 7/7 Plus/6s/6s Plus/6/6Plus/5s/5c/5, iPad/iPod Models (White)
Micro USB Cable, COCOFU 3FT 6FT 10FT Extra Long Nylon Braided Universal Micro USB Charger High Speed Sync&Charge Cord Wire for Android, Samsung, HTC, Motorola, Nokia and More (Silver+Gray)