CaseBuy Tech EZ Power Supply Tester 3
 

Diagnosing a faulty power supply can be a difficult process, but thanks to Casebuy in the past couple of years it's been made an easier process thanks to their EZ Power Supply Tester. Recently they've released their third incarnation of the tester with added improvements called the EZ Power Supply Tester 3. The new tester now features an LCD screen and can now display voltage within +/- 0.1V.