The USB Charger Doctor measures the amps and volts as they flow through your USB charging loop (from power source to gadget) - allowing you a real-time look at throughput and charging speed.
Measure your charging potential!
Ever wondered which one of your many USB cables can handle the most power for charging? Ever doubted the power output of your wall charger or power bank? The USB Charger Doctor can help show you just how much juice is flowing through your cables.
Simply plug it into your USB power source, then continue to connect up your phone, tablet or other USB-powered device. As soon as power is flowing, it will show you the Volts (U) and Amps (A) on the large, easy-to-read LCD display. The higher the numbers, the more power is flowing, and the faster your charging is.
Note: Because of the way power flows, you won't always get peak throughput. Factors like the power level of the battery being charged, the construction/length of the cable being used and the safety features of the USB power source can all impact the power flow from moment to moment. Don't be shocked when the readings are low.
Accuracy: This simple measurement gadget is no substitute for proper electronic measuring devices - accuracy isn't at lab testing levels. We find that it's good at identifying issues with USB cables and for comparing the charging potential of your various devices in a home or office situation - however due to losses of power transfer efficiency with the use of a power meter and a USB cable, don't expect to acheive the theoretical potential claims of your components.