Review: Niutudza 13.15 Volt diesel heater power supply, with a nicked power cable $36

Amazon Affiliate Link: https://amzn.to/3OvytbF Price as reviewed: $36 Diesel Heater Power Supply Adapter 110V to 12V/24V Transformer Power Converter, Diesel Powered Parking Air Heater Charger for 2KW/5KW/8KW Chinese Diesel Heaters RV Camper House Garage This is a 13.1 volt power supply sold to run 12 volt Diesel heaters off of home 120 volt AC. The back plate says it is rated at 80 watts (~ 6.6 amps at 12 volts) but can deliver 210 watts "peak". I ran it at 17 amps (215 watts at the 12.65 volt level it sagged down to) and it delivered that for a few minutes and then the voltage lowered until my load tested stopped drawing current, so it can certainly hit it's "peak" rating for at least a minute. I then tested it at a 6.6 amp draw (86 watts at the 13.1 volts it put out under that load) and it was able to do that continuously for a few hours. (The case got quite hot to the touch, but I was able to keep my hand on it, so probably 120-130 F max temp.) If you are using it to power a diesel heater that just has a 1-2 amp fan it probably won't heat up much at all. So, it worked fine for me, BUT, there was one big manufacturing defect I found that made me decide to not use it. On the AC power cable, the black insulation had been stripped off to expose about 6 inches of the internal conductors, and when that was done, the insulation on the internal conductors was nicked and pulled out just slightly. So inside the case, there was 120 volts AC on exposed wires separated by an air gap of less than a millimeter. It hadn't shorted out, but it was just sitting there waiting to do so. I expect that most of the units that leave the factory don't have this defect, but I'm also relatively certain that nobody at the factory is double checking to make sure of that. [The rest of the circuit inside was "fine". Built from low cost components (single sided circuit board, capacitors with a voltage rating just over what they needed to be to function, etc...) but no other issues I could see in the manufacturing.]