OptiMate 5 Start/Stop,12V 4A Automatic Battery charger & maintainer for Start/Stop, Hybrid Vehicles, AGM and Deep-Cycle Batteries (TM-221)

I recently purchased a three year old vehicle that I had shipped from New York and that had very very low mileage, so it was apparently not used a lot during the pandemic. While the 12 volt battery is holding a charge, it reads as barely over 12.1 or 12.2 volts most times and apparently this car likes it to be at least 12.4 to not give me a partially charged notice on the app. Although I've not have any start issues, I don't drive a lot myself, so I bought this to use as a trickle charge and I put it on the days that I know I'm not driving anywhere. It's been working well to keep the battery at a level where it doesn't give me that app notice. I probably need to get a fresh battery honestly, but they are high dollar and in the meantime this is helping to bring that voltage up. My first charge went all day before it switched over from an amber light charging to a green light for the 24/7 maintenance charge, but each successive time the time to switch over has been shortened. Regular use now brings the battery back up to a full charge and over to the maintenance charge in about 2 hours. Just hook it up and plug it in, so easy to use too!

This charger always keeps my batteries in great shape. Never overheats the battery you're trying to charge. I have 2 to keep everything charged up during the winter. Used one on my Hellcat over the winter with no issues.

The OptiMate 5 is hands down the best battery maintainer money can buy. I have had this now for about 6 months and every time I want to ride my motorcycle, I CAN!Gone are the days where I would go to start my bike and hear the ubiquitous clicking noise. I used to have the itch to go ride and then I'd have to charge up the battery and by then, I didn't want to ride anymore. This was the best purchase I have made in a while, as it has directly resulted in more riding time and absolutely ZERO hassle.This maintainer DOES NOT CHARGE YOUR DEAD BATTERY! It was not intended to do that. It just cycles the battery and keeps it topped off. You must charge your battery prior to plugging this in.I highly recommend you get multiple pigtails to hook up to all your outdoor toys/tools and you can then keep all of your items fully charged!I have been very impressed with the way this works. It doesn't make any noise like other battery chargers I have used in the past, it won't cause thermal runaway and it has brought back several of my batteries from the dead after a short charge from my main battery charger. I have even refreshed a 12 year old Harley battery with this thing.Imagine the money saved over the years, imagine riding your bike whenever you please.Buy one of these and stop dreaming!

I purchased this charger after having had an Optimate 4 for a while. When the new charger arrived I noticed it's was super lightweight compared to the older one. I was a bit disappointed since other solid state battery chargers had failed early in their service life. But I kept it because the old one had lasted. This one failed 3 months later. The charge light comes on and stays on, but no current flows according to my clamp meter.I have filled out a warranty request form at the Optimate website and waiting for a response. I'll update this accordingly after I get warranty service (or do not).UPDATE - changed ratingI contacted their support department and after some diagnostics they sent me a new unit.I have had their products in my garage for about 15 years and this was the first time I had had a problem.A quick resolution restored my faith. Good product, good support after the sale.

Works well during nonstop use for over a month while my car is in storage.

Its. simple to use plug and forget, but too expensive. Considering electronic products that you can buy for $20 dollars which do the same. That said if you are sitting on a 20K bike that is collecting dust in the garage as the battery is dead, and hitching a ride for a 600lb bike costs 150$. The cost pales in comparison to the pain caused due to a dead battery. For those of you researching how technically good and how many multipurpose it will serve, forget the research get a cheap product and connect it will serve well so does this product except its expensive. And shows lots of green lights that don't mean much.

I’ve used Battery Tender brand tenders for many years. Problem nowadays is many of the batteries are AGM type batteries and the old fashioned tenders don’t work on them. I bought the Optimate 5, based on a friend’s recommendation who uses them. It takes over and is automatic. It will bring back a discharge battery you might have thought was dead, unless there is a damaged cell. It runs the battery through some cycles and once it’s fully charged, goes into a maintenance mode. You can leave it hooked up all the time, it will not hurt the battery. I am going to buy a few more of these so I don’t have to switch it around.

I got the OptiMate 5 charger with the 15' extension and Weatherproof Permanent lead through Amazon about 1 1/2 months ago. I Had a smaller older one that worked very well so wanted a second better one with a couple more benefits. It brought back a weak battery at least for a little bit longer and keeps my other batters charged at all times. I use for Generator and a lift I have and electric golf kart. I'm a contractor so not messing with dead batteries all the time now. Not for jump starting and fast charging but great for maintaining and long term . You can just leave it hooked up and not worry about it, but your battery will always be charged. There is a connector where you can connect 5 batteries to one charger at the same time too.

Simply the best equipment you can own to exort sulphite demons and revive your batteries. I also own a Noco Genius which does much the same thing in battery maintenance but my Optimate has revived batteries abandoned by the other charger. Two months ago my solar system failed to keep the deep cycle batteries in my motorhome charged above 9.5 volts. Recently my Optimate revived them over 3 days back to a 13.25 volt float level. Optimate is now installed as a permanent fixture in my motorhome and activated on shore power.

I have a 2006 Porsche that I store in the winter. I let the battery completely die by mistake. My friend, who’s a mechanic, recommended this product and I was able to get the battery charged.

Love it - seem to be working nicely. So far very happy for my motorcycle battery.

Parfait ! Simplicité absolue, charge et test efficaces. Encombrement réduit, accessoires très pratiques (ex. cable de chargement fixé sur les cosses, branchement rapide et sans aucun risque.) Idéale pour un maintien de la capacité de la batterie par grand froid ou en cas d'immobilisation prolongée du véhicule.

Bought the same model years ago from Amazon. Died on me. So got the same one again..... From Amazon.....