Longwei K3010D 4-Digit LED Display DC Power Supply Variable, 0-30 V / 0-10 A, 4-Digital LED Display

Works fine and erfect for general use.

It does exactly as described. It saved me from buying 2 new flymo batteries (saving £140+), The charger was a smart one and as they dropped below a certain amount would not charge. 30-60 seconds gave the batteries the charge it needed and was recognised by the supplied smart charger. (please don't copy me, but it worked)

Well, initially I was going to leave a negative, 1 star review but... Eventually I persevered and stuck with the unit, fiddling about with the controls as best as I could figure out (not really worth referring to the manual, it's almost useless). The process was a bit hit-and-miss BUT eventually had the unit working as supposed, powering a surplus PC fan. I will attempt to explain at the end. The item was well packaged, compact and a nice looking unit. Process: While unit is OFF and +/- leads attached, turn VOLTAGE to MAX and CURRENT to MIN. Then create a short with the leads (nothing should happen). Turn unit ON - Turn CURRENT to MAX - adjust Voltage to required setting. Current will automatically adjust This is the process I used. Prior to this the voltage dial wouldn't set and fluctuated wildly from 0-20 V (with no between adjustment) leading me to initially think the unit was faulty.

Used this to power the wiring on a 1930s tram while attempting to diagnose how it was all wired. Very successful, as it shuts down successfully when there is a short.

Great quality product for the price

Excellent PSU, powered my HF ham radio with ease.

Great little power supply, does everyting is says and keeps cool. Multi-turn knobs so adjustments are finely graduated and remembers set voltage when powered off and on. Great VFM.

Better than some but you get what you pay for can not compete with models twice this model price naturally