Aneng SZ02 V1.3 & V1.6 multimeter raw test and comparison (XT-V2, FS2202, ZL122). V1.3 bad design❗

Available ranges (V1.3 & V1.6): V DC AC auto: ≈0.500--9.999V, 99.99V, 999.9V. (No manual DC AC selection. Doesn&measure voltages below ≈0.5V❗) A DC AC auto: 9999mA. (No manual DC AC selection. Low accuracy below 20mA) ? R auto: 999.9Ω, 9.999kΩ, 99.99kΩ, 999.9kΩ, 9.999MΩ, 99.99MΩ. Multimeter automatically selects one of the above measurement functions❗ ? . R semi auto: 999.9Ω. C semi auto: 9.999nF, 99.99nF, 999.9nF, 9.999µF, 99.99µF, 999.9µF, 9.999mF, 99.99mF. D: 2.999V. (Independent of battery voltage, built-in charge pump) ? V DC AC semi auto: -V1.3: 599.9mV. -V1.6: 99.99mV, 999.9mV. Current consumption: -V1.3: ≈2-3mA. ? -V1.6: ≈3-5mA. ? -Backlight: additional ≈7-12mA, depends on battery voltage. Low battery level: 2.4V. V1.6 hidden function, can be switched to 0-100MΩ auto ranging ohmmeter only, without buzzer and constant relay switching. Go to semi auto R, short the probes, long press SEL button. ? Price: $8 on promotion, $12 normal. Downsides: Version 1.3 has a bug/bad design. For 1 sec an internal impedance of the voltmeter is about 2kΩ (PTC and 2 BJTs input protection of the ohmmeter circuitry)❗? This version is more popular right now. 2:02 Both have a problem with redundant switching of the bistable relay, even if it is already in the correct position. You can&measure voltages below ≈500mV and above 599mV/999mV on the same measurement function❗ ? You have to use auto mode for voltages above 0.6V/1V and for resistances above 1kΩ❗ ? No MOVs input protection...