You can easily use your laptop to charge your smartphone, but if you need a fast method to charge it and even your iPad, the LockedUSB USB charging cable adapter should be able to help you.
The LockedUSB adapter is a practical USB charger firewall and power optimizer. As we can see from the image, the USB adapter features ultra compact design for easy to carry, and comes with a built-in dedicated controller chip and current limiting power switch that can automatically detect USB data line voltage and provide the correct electrical signatures on the USB charging cables in order to charge your mobile devices at their maximum rated current. All you need to do is just plug the USB adapter into your computer and connect it with your smartphone or tablet using your own charging cable. After the break, check out the following demo video.
At present the inventor of LockedUSB adapter is raising fund at Kickstarter. Pledging $25 will let you own the USB adapter and a 3-in-1 charging cable. If you’re interested, jump to Kickstarter official site for more details.