A part of the review has been auto-translated.
The capacity tester is easy to operate. On the left side of the battery compartment the power supply comes with a 18650 cell or alternatively the tester can be operated with a 12V power supply. On the pictures the result is the right 18650 cell. 1342 shows the mAh and 4868 shows the mWh. The 18650 was tested with another device, which is noted on the cell with 1548 mAh.
It is interesting capacity Liion 18650 cells tester. One side is for powering ekectronics circuits and the other is for testing capacity. It works fine showing both the capacity in mAh or in mWh. The controll is a bit confuse but I used for it. It is cheap but reliable. I rather move the discharging resistor far awy from the cell because of intensive heat production by the testing. Usable product for DIY makers.