Optimate 5 Start/Stop, TM-221-4A, 6-Step 12V 4A Battery Saving Charger-Tester-maintainer

This charger did not disappoint, it is easy to use and very reliable.

Great for motorcycle, mower, UTV, ATV, etc. I have two and they save you big money in replacing batteries every couple of years. Plug and play, super easy to use.

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!

great product does exactly what it is designed for,

Works well! Just what we needed.

I purchased this product on Aug 15, 2015. It has performed very will. It was able to desulfate a battery but, unfortunately, the battery was too far gone and several cells were shorted out. It also recovered my car battery with great success. The unit gets warm when charging a battery as would be expected but it does not get hot. For a very compact unit it does it's job very well. I do not often do reviews but this unit deserves my praise.

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!

These are Amazing. We have a ton of them at our Bike Shop and they bring back dead batteries.

Conforne description

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

Bonne qualité

Excellent charger/ maintainer... the only brand I use on the Motorcycle's, ATV's, RV's I own. Tried a couple of other brands and have ended up with cooked batteries. Optimate has worked out great for me ... even saved a couple of batteries as advertised... one is a 12v AGM battery which I've used on VFR800 for 8yrs.

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.