BLACK+DECKER BM3B Fully Automatic 6V/12V Battery Charger/Maintainer with Cable Clamps and O-Ring Terminals, Multi, 1.5 Amp

Item is a very good buy. Works great.

Somehow the world has made me come back to this product page a little over 8 years later and I figured I would write a quick review. TL;DR - Charger works well and has given me zero issues. Pros: The cord is plenty long for my garage outlet so I don't even need an extension cord when plugging in my "race car" as my kids call it. I only get to drive it once every few weeks so I throw this charger on there just to not worry about the battery possibly going dead. The power inverter is in the middle and can be mounted so you could possibly run power from an outlet, mount it on the wall or a workbench, and then have a good amount of cable to plug in a battery, depending on your application. It includes several ways to connect to the battery terminals. I just use the clamps and I have not had any issues. They are pretty sturdy and should hold up to normal use without issues. The unit has an easy to understand switch and lights for status. Switch to convert it from 6V to 12V, depending on what you are charging. The status light has simple icons that give a good indication of what the charger is doing. Cons: Not an issue for me but something you should be aware of with this (and likely most chargers of this type in this price range) charger is that it's not going to be super fast at charging a battery that is very low. Most of the time, that's not a big deal as its intended to maintain a battery that is sitting for long periods of time. Just don't assume you can plug this into a dead battery and come back an hour later and have it ready to go. Depending on how empty the battery is and how much power is needed to turn whatever you are powering over, it will likely take longer than that. Overall, well worth the 20 something bucks I spent on it. Not something I can always say with stuff from Amazon these days.

Works well.

I've been using the BLACK+DECKER BM3B Fully Automatic Battery Charger/Maintainer for a while now, and I own more than one — which should tell you how much I trust it. It does exactly what it's supposed to: keeps my 6V and 12V batteries charged and maintained without any fuss. The automatic switching between charging and maintaining modes is a great feature, and the included cable clamps and O-ring terminals make it versatile for different setups. One thing to note: while it's generally durable, rain can affect its performance temporarily. If it gets wet, it might stop working until it dries out. That said, once it's dry, it picks up right where it left off without any lasting issues. I just make sure to keep it sheltered when possible. Overall, it's a solid product that does its job well - just be mindful of the weather if you're using it outdoors.

I plan on using this on a vehicle to maintain the battery when I will be away for weeks or longer. This B&D labelled unit specifies it switches to float mode when battery if fully charged. Also it is rated 1.5 amp, so I feel it will not damage my battery. I have not use it yet, but volt meter showed it was charging at 15 DCV, the correct lights on the unit were light, so I am confident it will keep my battery topped off when I am not using the vehicle. Compact size with nice long cords. *Note the unit does not come in a Black and Decker printed box, but a plain brown box that looks like it was made for the unit. Also the first unit I received was missing the alligator connector, and Amazon took the return and shipped my reorder immediately. Easy to use, and a good value.

I am using it as a battery tender for my BMW R9T 2015, it has a setting for 6V or 12 V . I have it set on the 12 V and automatically looks at the voltage of the battery in the bike and starts to charge when it sees a low voltage. since I dont ride too often I like to have the battery charged when I want to go riding. If I left the bike without a tender I would be charging the battery and reprogramming some of the functions of the bike the night before I want to ride… With the charger I just have to disconnect and go for the ride… no worries. The previous tender lasted 5 years , lets see how long this one lasts… simple enough, plug on the walk, connect to my prewired set up and start charging if needed. If it does not need the charge it stays standby … plug and forget. It comes with two extra connectors, o e a clip on and the standard bolt on to the battery. The plug has a cover so that when it is not charging it can be stowed away. nice for the price. Update!!: 15 days after putting it to work on my Motorcycle battery it died. The other one I have has been in service for years this one is dead... No good , returning within the date they allow.

Good product

i used it for straight 4 months, than it broke cuz its 110v and we have only 220v here in Saudi.. but it stood this time! i believe if it was 220v compliant i wouldn’t need ever to change it

How good are they, send a product to Australia with a US power plug on the product. How am meant to use the product? Very disappointed with the distributor.

Excelente produto

Great charger. Works well with AGM batteries.