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Works great for checking Cable quality and shows you in depth if its actually charging or if your battery's are bad because they wont charge. Especially great for checking Cables some Cheap cables don't charge your device fast because they are Cheap and If the AC to USB adapter is actually putting out the advertised AMPS. this unit will tell you if everything is working Great.
Verified purchase: Yes | Condition: New
The Keweisi USB Power Tester is an excellent value. When tested using a precision programmable power supply, the unit was found to be very accurate. The construction is durable and the design is compact.
Verified purchase: Yes | Condition: New
I recommend this USB analyzer for its bright easy to tead display and very accurate information.
Verified purchase: Yes | Condition: New
You can now monitor your USB port voltage and amperage. Know what is provided to whatever device. These are an extremely valued device.
Verified purchase: Yes | Condition: New
Not accurate, bought two, both are way off.
Verified purchase: Yes | Condition: New