CTEKMulti US 7002, 12V Battery Charger for Cars, SUVs and Trucks, All Weather Smart Charger, Battery Tender Charger, Battery Desulfator, Battery Maintainer, Power Supply Mode and Reconditioning Mode

I did a lot of research before settling on this brand and model CTEK Multi US 7002 Charger. I don't regret choosing it one bit. This is replacing an old Deltran Battery Tender. After inspecting it, I could tell that a lot of thought was put into it's design and functionality. I have it connected to my 2010 Corvette Grand Sport. It was easy to hook up and activate. The main cord wasn't long enough so I ordered the extension cable at the same time as the charger. I ended up ordering the cigarette lighter adapter later. By using the cig. adapter, I can more easily connect and disconnect the charger to the car without opening the hood. By the cable being routed under the door and into the car, to the center console, instead of going into the engine compartment, the cable is also protected better. I like the power supply feature but haven't used it yet. It's nice to know it's there if I need it. I mounted the unit on the garage wall using the two supplied screw holes. I still wish CTEK made a holder for it but I can fabricate one later. It's quiet and the status indicator lights quickly and easily show you what's going on. I like ordering from Amazon and fortunately Amazon had this charger and the accessories at the best price with fast shipping. Now I see why CTEK Chargers have such a great reputation.

I have two cars. One car has a traditional battery and the other has a new style AGM battery. I had an ancient battery charger (10amp) and tried to recharge the traditional battery. Apparently, I left the charger on too long because the sides of the battery started to bulge. I ruined the battery. I went to AutoZone to have the battery tested, and yes, they confirmed that the battery was bad. I bought a new battery.I searched on Google for the best car battery chargers for 2019 and discovered a list of five. They considered the CTEK 7002 as the best. What sold me was a video with Jay Leno (the former talk show host who has lots of cars). He said that all the expensive cars (Mercedes Benz, Porche, Ferrarri, Lamborgini, BMW, etc.) recommended the CTEK products.That sold me. It will charge both the AGM and normal batteries. All you have to do is to select which battery type you are charging and connect the cables. It does take a long time to charge. On my AGM battery, the CTEK took about an hour. The CTEK 7002 goes through several steps of analysis and charging. But, it will never overcharge! You can walk away and come back at your convience.My normal battery (the one that I had just bought from AutoZone) took two hours. Apparently, even though it was brand new, it was only charged up to 80%. The CTEK brought it up to 100%. Again, all I had to do was to select Normal battery and connect the cables to the battery. Then, I walked away to do other things.Oh, on newer cars, if you remove a battery, apparently, you loose memorized settings for your car. The CTEK has a setting where it provides 13volts to your car's electrical system while you remove a bad battery and replace it. This way you do not loose all your memorized settings.This is a very good product. I am a believer.

At more than a couple years of ownership on the first one, I'm back looking at getting another. I generally have one car that gets to hibernate for the winter. Meanwhile, my wife found out about the heated seats and other winter comfort features in my daily driver, so her normally "preferred" driver is also getting some winter hibernation time this year. The 7002 US that normally "lives" attached to the Porsche when it's not used regularly is now doing tag-team duty with her car in the same storage bay.Her car has about a 40mA parasitic drain while sitting. This is keep-alive memory for the radio, the nav unit, and for all the traction and stability management systems on her car. Some basic "battery math" says that a car with that range of parasitic drains shouldn't sit for any more than a week without either driving or battery-maintainer support.. The Porsche sits with the battery completely disconnected during the winter, so the maintainer has an easy life. Meanwhile, her car needs the battery connected even while stored, or it "forgets" some critical stability-management details when reconnected. So this maintainer is connected to the battery while the battery is still connected to the car. As another reviewer points out, the small parasitic drain causes the "pulse maintain" section of the charge sequence to drop out, then come back after a short while. Guess-timating total cycle frequency is a few minutes, with about 20% "on" duty cycle in that time.I've put Volt and Amp meters on the charger connections to the battery, and see that it starts the 'charge' part of the pulse charge cycle at a little more than one Amp, then quickly reduces that to a small fraction of an Amp for the rest of the 'charge' part of the cycle. It would be easier on the battery if it wasn't cycling so much, but... there's no good way to make that happen and guarantee that I wouldn't have to go back and rebuild the learnings of the stability management system from scratch if there were even the slightest power glitch. I'd end up with a UPS (and another battery to maintain...) before I could make the supply to the car reliable enough to risk disconnecting the main battery. Not the best idea.Instead, her car will get its own dedicated maintainer for the hibernation season. The battery will have to "suffer" with cycling in the pulse mode some. Compared to the option of seeing the maintainer on a four-day rotation with the other car, it will be a -lot- happier. At least that's how I rationalize buying another 7002 US. The batteries are well over $150 each, so easy to justify financially. She gets maybe three years on a battery in her car historically, while the one in the Porsche is coming up on four years old now. Both test well in both load load tests and specific-gravity fluid tests, so for me the second maintainer is an easy choice.The one I have already has proven its worth over the last few winters and other storage periods. Another one will help me spread the joy (and the $avings) to another worthy battery.--- I looked carefully at a few others along the way. A Bosch model was highly recommended by some Porsche buddies, but it needs a manual restart each time it's plugged in or suffers even a momentary power glitch. The CTEK restarts in the same mode you last used it, so is a lot more forgiving for stored vehicles. I used one of those inexpensive (~~$25) Schumacher ride-along maintainers for years,but found that it sometimes caused more electrical wear and tear on an installed battery than I was willing to tolerate. Into the wastebasket, replaced with the CTEK.Note: I've held the tools in my hands professionally to put myself through engineering school, and keep up my skills as a hobby these days. I like being able to have and use the right tool for the job. This tool is right for this job.