XINGYHENG2Pcs 20A 300W High-Power Buck Converter Module DC 6-40V to DC 1.2-36V Adjustable Constant Voltage Constant Current Power Module Charging Drive with Short Circuit Protection

My on second order of these.I use them to reduce the speed of my daughters power wheels with the Milwaukee M18 battery mod

Didn't work. Tried charging lifepo4 battery. It wouldn't charge. Only way I could get it to charge was having cc at the lowest then connect it to battery and then turn cc up. If I unhooked one of the clips I was using to attach the buck converter to the battery for charging then re attach it, the buck converter output stays off . It's very annoying having to repeat the process of turning cc all the way down and re attaching clips just to charge the battery. Don't buy if you want to charge a battery.

Couldn't take 8amp 33v input..2 died in a row in a minute. Used another brand ..same wiring..and all 4 are running fine months later. Might have had a bad batch?

(used) to limit source current (Automotive 9A on auxiliary DC

The convertor works for my application where I had to step down a 36V lithium ion battery to 28V @ 2A. Biggest issue for me is the LED showing it is on and high current with no load. The heat sink does get warm with no load. So you will be draining batteries if you do not turn off the input power.Screw holes are easy to use. Not enough room. Terminal blocks can break or bend easily, so do not over torque.In a pinch it works.

Delivers the power well. Hard to tell how the variable current works though.

I order 2 and both of them don't work 12 volt in 12 volt out pods doesn't change anything disappointed I try to boost to 15 volt nothing happend bad batch or something they should test them before shipping I try different supplier

Not good, both broken after use without any reason, no found by any sign of eye

Hi, I got this and both work perfectly, you will need a multimeter to correctly adjust the voltage and amperage. The main note is these potentiometers require A-LOT of turning. You will notice a clicking once you turn too much indicating that you’ve reached a maximum. But in general you will need turn it until the potentiometer is engaged and then till the correct reading. Please also note that counter clockwise lowers the voltage or amperage and clockwise increases the voltage or amperage. Hope this helps anyone!

Total of 5 ordered of which only 2 worked. (The Led turned on at 13.5 v volt input). As it worked I could do some setting. Volt set at 13.6 volt. On load at 6 amp from buck converter o volt stabilized at 10 v. Adjusted current to stabilize to 12.5 with load. Input was at 14.5 volt 4.5 amp. Waiting on replacement.

I ordered 2 before these, one was dead and the other one was fine. Got refunded. I got these and one came damage from shipping it looks like. Package was fine so maybe it happened before? Don't know but dont order only 2 if you need 2! Still gotta test them, they might work fine anyway!

Facile à ajuster