I have had it for 4 years and I use it moderately. Very good for continuous power supply (up to 40A) for programming, etc. It has done several little tricks for quite depleted 12-volt batteries (e.g., 8-9v). Recently, it has been heating up more.

Excellent charger and battery maintainer. I have been using it since December '16 to maintain batteries of 170Amp machines and above. The machines do not work often, but I never had any problems as long as I maintain the batteries with this tool. It has many functions and is worth its money. As a booster, it only works at 12 volts. The only flaw is the connector on the charging cable, from which the cables came out after the first few uses, but with 10 minutes of personal work, it became new

The best thing I had charged everything before I had a 540 amp charger but the new batteries could not be charged by it, this one is very good