Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123

I have had this tender for over 2 years now and of course it works great. The brand is great, it keeps my motorcycle battery alive during the cold season. Easy to use and great value.

Must have item! This has kept our 12v car battery fully charged and functioning like a champ even in single digit freezing weather. Had to buy one because without it the battery kept dying even after replacing with a new one. No more dead battery issues after several weeks and so relieved that this was all we needed to resolve the issue. Love this charger!!

A great way to make mower and Ranger batteries last for years. Mower would only last a year before I started using these. It’s lasted almost 3 years now and still works great. Keep batteries water topped off and charged with these trickle chargers. I’ve never had one to fail. A real money saver.

An absolute necessity for motorcycle owners. When it comes time to winterize your bike you gotta keep the battery healthy. This little device was made for that. It has great functionality in that it recognizes the varies charge states and applies the level you need. It’s small and works with most motorcycles. It’s been a great addition to the garage.

These are the best! I have four of them on my, Polaris Ranger, Polaris Sportsman, John Deer Gator and John Deer mower. They work flawlessly! I never worry about them when they're hooked up. I use them all year round without incident. They are small lightweight and super reliable. They are either charging or maintaining the batteries all the time. The are especially useful in the winter. The cold drains a battery and this little guy keeps them charged. The new version comes with alligator clamps (I don't like) and they say you can use the loop holes on the clamp to connect to the battery terminal. Unfortunately those loop holes are too small to go onto a battery terminal. However you can buy Battery Tender "the quick connect ring terminals" with larger loop holes to attach to your battery terminals. I gave it 4 stars due to the newer product not having large loop holes.

I have ordered and used a number of this model for both vehicles and ATVs and they work extremely well. Long cord which helps for access. The gauge is easy to read. Flashes when charging till stable green and know battery is ready to go. If don’t drive a vehicle frequently this will save you money on keeping the battery working well.

I have had an older model for over 15 years on my ATV and am still using the original battery that came with the ATV and which should only have lasted about 4 years. The tender finally quit and so I got a replacement. Wonderful product.

I'm a greenhorn at car-care, but this product was pretty much foolproof! I'm using it to keep the battery topped off for my family member's car, as she has just had surgery and won't be driving for 2 months. I do not need it for months and months of storage and maintenance, so the 2018-era reviews complaining about "now it only lasts for one year" after the manufacturer's move to China, really don't matter to me! I really appreciate the built-in safety feature of no sparking if you touch the clips together. Current won't flow through this product, even when connected to the outlet, until it senses 3 volts. This could make it hard to charge a TOTALLY dead battery with this product, but it worked perfectly for us. To put this thing together, you'll have to pick either small-ring connectors - which are for the non-car uses that will sit for over 6 months, like an ATV or motorcycle or boat - or the alligator clips, which are for cars and bigger engines that will be connected for just a few months. You'll also have to have color vision to discern between red and black, since the alligator clips confusingly have a (+) symbol on one side of their jaws. On the second jaw, they differ (+) and (-), so if you can't tell them apart at first glance The most difficult part for me was step 6e/f in the instruction manual - determine if your car engine has negative-ground or positive-ground status. Like I said, I'm a greenhorn here. Sure, the manual says "most cars" are negative-grounded, but I didn't want to mess it up, cuz car batteries are big hefty things you don't play around with. After real careful inspection, I found that the battery of our car had a wire going directly onto and behind the hefty metal of the vehicle body or "chassis" I learned it is called, which came from the (-) side of the battery. The (+) side had a complicated plastic cover over it, which made connecting the alligator clip a bit difficult, and that side's wire led to other engine parts. That's what made me 90% sure that the negative side was the "grounded" side. So I connected the (-) black clip to the (-) side of the battery, and the red clip to a nut-and-bolt part of the engine. I was able to close the hood on the car most of the way by turning the clips sideways and flat as I could. It's not latched at the moment, but sitting in our garage, it should be plenty protected from spiderwebs and dust and whatnot. No option in our case to thread the cable thru the front grille since it's pretty jam-packed with engine parts right behind it. My one complaint about this product is that the cable ending in the two alligator clips splits pretty close to the jaws end, and it would help to have it split further up, to help users reach a part of their engine block or chassis more easily. Also, I highly recommend addition of diagrams. There are words saying "connect wire to engine block or vehicle chassis, not sheet metal or fluid lines" but some of us need an illustration of what is a sheet-metal body part vs the vehicle chassis! Once connected to the engine, I turned my back on it just in case, to plug in the "wall wart" (credit to Mythbuster Adam Savage for that term) and the light turned steady red! This was encouraging, since when I had tested it earlier by plugging it into the wall with no connections made, it blinked red. So I was confident I did not have a defective wall wart box. 6 hours later, the light had turned blinking green, and 6 hours after that, it had turned steady green, which the manual says is the perfect state to leave it in for 'drip feed' of electricity to keep the battery operable while not in use. So I am perfectly satisfied! Our car's battery was diagnosed by a mechanic as "being on its last legs" anyway, so this comparatively cheap product, for 2 months of use only, is perfect for our needs. I'd recommend anyone with a really expensive car or battery that needs storage for 6 months or more do a bit more research and spend a bit more on it.

Very nice product and works amazing.

Perfeito

This item is really for the U.S. market and was of no use to me as can not be safety used with uk power system.

Comprei esse modelo para manter a bateria da minha moto. Esse modelo é 110v(não percebi essa informação no anúncio) e eu precisei comprar um transformador(mais fácil que devolver o equipamento) de 220v para 110v. Mas tirando esse detalhe deu tudo certo.

These are used on our lawnmowers, tractors, and pickup trucks. The larger batteries take a long time to do a full charge if you need to with the Jr, but we use a higher output charger in those cases. In terms of partial charging like topping up and floating/maintaining, which is what we were after, this Jr model does the job. In the past we had some equipment that wouldn’t get used very often, especially throughout the cold Canadian winter and so the batteries would only last 2-3 years. Ever since we started using these maintainer products our batteries have been lasting 6-7 years. As soon as something gets parked it gets connected to a Tender, and the engine always fires right back up because of this. Considering batteries typically cost hundreds of dollars, the cost of these maintainers is well worth it. Our oldest Battery Tenders are over 12 years old and are still functioning, and only 1 has ever stopped functioning after a decade of consistent use. It comes with a full 12ft cord with a quick connector at about the 10ft mark, and both a separate 2ft clip or ring terminal cord. Both cords have replaceable fuses. You can hook up both to different batteries at the same time and just disconnect the quick connector to move the maintainer between them. The plug box is lightweight and doesn’t sag on the outlet and leaves enough space to use the upper socket. The cord has a medium flex and has a somewhat tough jacket, but isn’t built for being heavily abused. For the more technical buyer, this unit looks to hit a max of 14.5V and 800mA while charging and floats/maintains at 13.1V to 13.4V depending on the ambient temperature.