TITAN New Special Charger

Taichi 2in1 USB charger, a combination of USB charger and car battery tester means you could charge the devices such as iPhone, iPad, tablet PC etc. in the car and check your car battery condition at the same time. 

As you may see its DM for details and also check its website, http://www.titan-power.com/15tc25tc.php

The Titan Taichi 2 in 1 USB Charger tests your car battery while it can charge so that you can determine if you have battery or voltage issues before plugging in devices, it also can charge a tablet and smartphone at the same time or 4 devices with 24V batteries.