Battery TenderWaveCharge 12 AMP - 4 Bank Multibank Charger - 3 AMPs Per Bank - Selectable 12V / 6V - Smart and Switchable Multi Battery Charger and Maintainer - 022-1004-DL-WH

Worked Great

I have a couple of cars that do not get used much. I put the batteries on the charger and when I need them they are ready to go. Being able to hook up more than one battery at a time is awsome.

Nice solution, seems better than the old version, gave it as a gift so don't have any real data on it yet but 4 motorcycles will have charged batteries over the winter now.

Bought this and we used it all winter keeping our toys charged. Worked just fine

The 4-Bank Battery Charger by Battery Tender, is a simple and convenient way to charge up to 4 batteries in your RV, boat, car or anywhere else you have 6 or 12V batteries. Here are some of the things I’ve learned while owning it and things to consider before buying.I. Quality – This is a well-made product that’s similar to the battery tender I have from this company. I’d put it in the upper-middle level of the quality scale for battery chargers and guess that it’ll survive for years, like the other things I have from them.II. Installation – Its set up well to either just be used on the fly or installed more permanently, like I’ve decided to do. You can easily mount it to the inside wall of the battery compartment of an RV and utilizing the ring terminals directly. This way it can easily be plug in when needed and keep the house or engine batteries charged.III. Performance – It works great with no issues. It’s simple to use by selecting the type of battery you have, it’ll charge it up and then maintain if you leave it connected. It can handle almost all types of batteries that are currently on the market that are either 12v or 6v.Overall, this has been a fantastic choice for me to charge and maintain all the needed batteries in my life, with simplicity, confidence and ease. I’ll be sure to update this review, if I ever start to have problems with it.You can trust that this review is simply my honest opinion that is attempting to provide you with helpful insight that I wish I had before I picked this product. Hopefully it was helpful in your decision.

First off, this is a Battery Tender brand product, so I had/have zero concerns about using it on my expensive batteries. I've boiled three batteries dry using other brands of battery maintainer, but every Battery Tender brand battery maintainer I've ever had (I have/have had seven of them) has performed flawlessly.Second, for some reason, the manufacturer is advertising this as a "marine" battery tender; I'm not sure why.The product itself is just what I have been wanting for a long time; it is basically four individual battery tenders combined into one device. The product is roughly 8" x 10" x 4" thick, and it includes four output ports.Per the manufacturer's instructions - which you will want to keep with you, as they include a LOT of detailed information - each output port (charge port) functions completely independent of the other ports. Ergo, I should be able to use it to charge four different batteries with up to three different chemistries (lead-acid, AGM, and lithium iron phosphate) and all with different capacities, as well as either 12V or 6V.Other features of this charger include 12V lithium recovery mode (should you draw down a LI battery to between 4-8 volts, a safety timer which will quit trying to charge a battery if it does not reach its optimal voltage, and qualification/initialization mode, which ensures voltage levels are good and electrical continuity checks out between the battery and charger.Overall, this is a really top-quality battery maintenance product, useful for those who have multiple vehicles or multiple batteries to keep topped up when not in regular use.

Great option for charging/maintaining 4 batteries. Easy to setup and it's a great design to have the ring terminals attached to the alligator clips which can be removed to direct connect the ring terminals to the battery. I've had many Battery Tender products and they never disappoint. Works on lead-acid, flooded, AGM, and gel cell batteries in 6v and 12v. Batteries are too expensive to use a cheap charger/maintainer that can cook your battery. I use this in my garage next to the atvs and motorcycles to keep the batteries topped up. I used to use the small Battery Tender chargers but this is a nice upgrade and condenses all in one for easier management. It says it's weatherproof and while it looks the part I don't think I would mount it outside. If mounting in a boat I would select a relatively dry location just to reduce exposure. To get this quality I would expect to pay $100 per charger so with 4 chargers in this unit I consider it a good value.

I currently have four lead acid batteries on my boat. They are due for replacement soon. I plan to replace them with LiFePo4 batteries. This charger is advertised as suitable for both types of batteries. Unfortunately the charger comes with warnings attached to all four charging wires that says it it should be used to charge lead acid type batteries only and may cause other types to burst. (See photos) I don’t know if this is just a mistake or what but I can’t risk having a battery burst. In addition the same warning says it should not be exposed to rain. Rain is pretty likely to happen if it is mounted on a boat. I am returning it.