HiLetgo DC-DC Step Up Booster Converter 3-35VDC to 3.5-35VDC With LED Voltmeter Module Power Supply Voltage Regulator

I have solar and Aux batteries in my van. I used this for my LCD monitor and set it for 19.5 volts (the adapter is 18-20VDC) that way the fluctuating voltage from a low battery to charging will remain steady at 19.5 at the monitor. I use it with a 12V NUC computer so I can kick back in my elec. recliner (have that on a pure sine wave inverter) while waiting on friends when I give them a ride on an errand and watch movies or surf, or just hanging around. So far it's working fine. I will update the review if it fails, but it's not even warm...

Boosts voltage as expected. Using to boost voltage to trailer plug on motorhome. Easy to install & configure. Handy button to disable display is better than jumper mentioned in description.

first purchased one worked to the point where voltage went through it from one side to the other. could not be adjusted though. So return that one and got another one sent as a replacement. The replacement came in, but the bag was taped closed, not manufactured seal. Previously opened possibly? Got it hooked up and seemed to work great adjusted properly. got it set to the output voltage I needed and worked for a few minutes testing it out. Turned off the device it was wired into. Turned it back on but the step up did not turn back on with it. totally dead. Was not a huge step up I was trying to do either. Was wired from 5v in to 12v out. Wish it worked because it has such good potential.

My Line 6 Variax power supply conked out, so I took out the innards and replaced with this. It works perfectly, with no issues or noise problems.

This product didn't come with a manual.By holding down the right button you can change the display that shows on the output. (Long press to start, right and left to adjust, long press to save). With no manual you might think that's actually changing the output boosted voltage. And then when things don't work you think it's a defective product. By reverse engineering it turns out that this feature is actually for calibrating the output voltage displayed. The small potential screw changes the actual output voltage.Only did a quick test if 13.3V DC to various voktages around 20V DC. No issues. And calibration held accurately. I can't say if the calibration was accurate out of the box because I changed without knowing what it was.Always nice to under promise and over deliver, although I give it a four because you really do need a manual for this sort of thing.

Over the last 5 years I have use 12 DC boosters from various suppliers. The HiLetgo booster is the best for the money. The status LEDs are very useful when trouble shooting circuit problems. The output is very stable.

Works good

Exactly how this device functions is not intuitively obvious. The key component on the PCB is the LTC 1871, but looking at Amazon, it is not easy to distinguish this from other PCBs with the same component. An earlier review, for example, remarks that a "long press" of the INPUT button performs something not done with a quick press. I could not distinguish any difference in effect on the one I received. Another comment suggests the INPUT button will shut off the output curret. My voltmeter says NO, the LED dislay may be made to go black, but the OUTPUT remains hot.A very careful, and well structured performance test by RoboJax on YouTube shows that the device is stable under low loads. But when really pushed to perform -- 3v Input, 36v Output(!), and 6 Amps load -- the output could not maintain the set target. [But, consider the amps on input this would require. 36v * 6A = 216 Watts; 216 W / 3v = 72A ?] It was not clear to me that the issue was not the power supply. After all, the listing rates it for 100 Watts.I did find a general description of control options on the similar product listing by seller Deeoee. (Illustrations do show some physical differences, though these are not obvious to a shopper. There the product details do describe multiple display modes. I wonder if Hiletgo has a mixed range of products, and some buyers get one model, others get something different?