UNI-T USB tester UT658LOAD

The UNI-T UT658LOAD is a USB tester designed to check chargers, power banks, USB Type-A cables and other power supplies. It measures voltage, current, energy, capacity, equivalent circuit resistance and the voltage on the D+ and D- data lines, giving a more precise picture of how the tested devices perform. A built-in electronic load extends its use to servicing, production and hobbyist testing.

The UT658LOAD supports USB Type-A ports and the 2.0 and 3.0 protocols, measuring 4–24 V DC and 0.05–3 A DC. It also tracks capacity up to 99,999 mAh, energy up to 1,000 Wh, equivalent resistance from 1 to 480 Ω and D+/D- line voltage in the 0–3.3 V range. The built-in load settings of 0.5 A, 1 A, 2 A and 3 A, up to a maximum of 60 W, make it easier to observe how chargers and adapters behave under load.

All key readings appear together on a single screen, so results are easy to review. The meter stores 10 data sets, records for up to 99 hours 59 minutes 59 seconds and supports the QC 3.0 fast-charging protocol. Measuring 122 × 53 × 27 mm and weighing 114.4 g, it is compact and comfortable to handle.