PowerMax PMBC 100 LK 12V Battery Maintainer Charger, Flash Reprogrammer & Adjustable Power Supply w/ 15ft Cables, Voltage Display & Mounting Brackets for RV, 12V Car Audio, Boat Motors & LED + House

I am a service manager and have purchased several of these battery maintainers for my technicians to use while they perform lengthy software updates. The brand we work for (I won't call them out) has a similar product that they sell for 10 times this amount. We have been using these for well over 2 years now and they have held up and have not given us any issues with the exception of 1 unit which the company was happy to warranty out for us very quickly. I highly recommend these battery maintainers.

Best charger and maintainer I've been able to find.

Used at place of work for a sturdy voltage supply to vehicles needed during software updates. Has been very reliable. No issues at all. The sticker on it has been peeling off and will not stick since day one.

Everything is still working great. Works with Porsche Diagnostic Tool (to provide enough battery power) no problem

Still use it daily. Good clean power supply. It's been about a year. Use it for auto programming and diagnostic.

I love this for it’s simplicity. It’s either on, or it’s off. No settings to change. No time outs or other smart box features to worry about. I connect it to a vehicle, turn it on, and it’s already dialed in at a perfect voltage range for passthru programming of most cars. Literally set it and forget it. That peace of mind is invaluable for passthru programming. Runs between 13.6 and 14.4 vdc depending on the vehicle’s “ignition on” load. Cables are a bit long but I shortened mine to minimize voltage drop between the supply and the clamps. Cooling fan comes and goes as it should. I’ve ran mine on a program event for 3 hours without any issues. Would definitely buy this one again if i ever have to.

Product is great. Those who are having issues maintaining adequate voltage while programming need to turn on consumers in the vehicle to keep the charger in charge mode or it will reduce output when it senses a charged battery and low load on the battery. That is how you get around this issue since it doesn’t have an actual power supply mode or flash program feature. Just keep a high load on the battery so it sees a demand to keep supplying constant voltage and current

OK. First of all the instructions are terrible. You would think that someone in the United States would simply write a one page instruction sheet, run it off on a printer and throw it in the box, but no. They have this horrible Chinglish information sheet which you have to decipher. If you are used to a simple, inexpensive battery charger, you can forget about that this one is bulky, and if you use the suggested 6 AWG grounding table (not supplied), IT GETS BULKIER. But it works for those long programming/ diagnostic sessions. Also a pretty great battery charger.