Xtar USB Detector
This USB detector from Xtar is quite a handy device to have for any person who is wondering if their charger is properly powering their batteries, without over-charging them. It is very portable and features a high precision display that shows your readings to 2 decimal points. It is able to measure the output voltage and current accurately. It has an LCD screen that is very easy from which to read the results. Overall, this is a very handy device that does exactly what it is intended to do.