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This is a great little device ideal for electronics hobbyists and mobile phone repair shops and the like. This will show the voltage of the USB port and the current drawn by the device so great for finding faults with the charger or phone. I used it with an Arduino to determine how much current the circuit takes which was ideal for determining my project's power requirements. Voltage and current are shown on two clear LED displays and there are two USB ports (note that only one passes data through, the other supplies voltage only) so one could be used for power faults and the other can be used to program a microcontroller without having to disconnect the device. Very cheap but worth buying.
Verified purchase: Yes | Condition: New
I was having charging issues with a second hand tablet that I bought so I got this tester to check that my charger (built in to a 13A socket) was working ok. I was shocked to find that it only gave 4.7v. No wonder the tablet was slow charging. This little gizmo was then put to work checking all the chargers in the house and what a range! I now know that my oe Samsung charger is the best at 5.25v. It charged the tablet with no problems. So this gizmo has more than paid for itself.
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
Excellent
Verified purchase: Yes | Condition: New