Name: BLACK+DECKER 6V and 12V Battery Charger/Maintainer (BM3B)
Brand: BLACK+DECKER
SKU: 21721663
Availability: OutOfStock
Rating: 4.2 (561 reviews)

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BLACK+DECKER 6V and 12V Battery Charger/Maintainer (BM3B)

<ul> <li>Works with 6V &amp; 12V battery systems</li> <li>Fully automatic high-frequency charging</li> <li>Reverse-polarity protection</li> <li>Circuit protection against overcharging or short circuit</li> <li>Connects to battery via clips, 12V plug &amp; battery ring terminals</li> <li>Includes built-in mounting brackets &amp; AC plug</li> </ul>

The Black and Decker Battery Maintainer/Charger keeps your 6 Volt and 12 Volt batteries at optimal capacity with fully automatic, high frequency charging and reverse polarity protection. It's perfect for vehicles that only see seasonal use, including RVs, specialty vehicles, antique &amp; classic cars, marine deep cycle batteries, motorcycles, ATVs, snowmobiles, personal watercraft and more. Keep it plugged in during the off-season, ensuring your batteries will stay topped off without ever being overcharged or damaged. It comes with two different connector sets, including battery clips and battery terminal rings. The BLACK + DECKER BM3B is also sealed for protection against moisture, dust and oil, so it's perfect for your garage, shop or shed.

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WARNING - California Proposition 65

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Get years of protection for just pennies a day.Plan covers:<ul><li>Mechanical & Electrical Failures</li><li>Item Failures During Normal Use, or from Normal Wear & Tear</li><li>Other Common Malfunctions</li></ul>Plan includes:<ul><li>24/7 Customer Support</li><li>Easy Online Claims</li><li>Fast Repairs or Replacements</li></ul>Protect it today. Enjoy it for years.Simply add a Walmart Protection Plan to your order and checkout as usual. There is no need to register your plan for it to be active. We?ll send plan details to your email address after purchase.Award-winning protection backed by AllstateAllstate has been protecting people and the things they love most for over 85 years. So you know your purchase is in good hands.

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Reviewers highlighted: price, ease of use

The Black and Decker Battery Maintainer/Charger keeps your 6 Volt and 12 Volt batteries at optimal capacity with fully automatic, high frequency charging and reverse polarity protection. It's perfect for vehicles that only see seasonal use, including RVs, specialty vehicles, antique & classic cars, marine deep cycle batteries, motorcycles, ATVs, snowmobiles, personal watercraft and more. Keep it plugged in during the off-season, ensuring your batteries will stay topped off without ever being overcharged or damaged. It comes with two different connector sets, including battery clips and battery terminal rings. The BLACK + DECKER BM3B is also sealed for protection against moisture, dust and oil, so it's perfect for your garage, shop or shed.

The BM3B Battery Maintainer/Trickle Charger can be used to slow charge/maintain a car battery by being connected to the vehicle by either the battery terminal clips, the battery terminal rings, or by a DC accessory plug.

yes as long as your car has a cig, lighter that is hot all the time with key switch in the off position.

Yes, it only draws 1.3 amps and will charge your battery directly back through your cig lighter has long has that lighter is always powered on even after you turn your ignition off.

Yes as long as your cigarette lighter stays on with the ignition off, in other words check to see if your lighter works with the key OFF.

I checked and the 12 volt cigarette lighter/ power plug on my Honda is NOT active when the car is off.   You have to turn it to accessories and I was told that would use more power than the charge it was receiving from the maintainer.  In addition, they cautioned that on a new car with all the electronics charging using the 12 volt cigarette lighter/power plug could damage the car's electronics.   Check with your dealer before using this method.

Will this slow charge/maintain a car battery if connected to auto via 12v cig lighter plug vs cables?

The BM3B Battery Maintainer/Trickle Charger can be used with AGM (Absorption Glass Mat), sealed lead acid, and gel type 12volt batteries.

Yes, this should work on an Absorbed Glass Mat, gel cell or any other 6v or 12v battery either wet or dry.

It didn't seem to work on my new AGM battery.  It charges it, but it never stops charging.  It was up around 14.55 volts after 48 hours and I decided that was enough.  Maybe it would have finished eventually but I am not risking overcharging my new AGM battery.  I bought a CTEK 4.3 and it tops it up in a couple hours.

Will this work on AGM or gel cell 12V batteries?

The power cord on the BM3B is 6 feet long. This unit has a one year warranty.

6 feet to plug in and 6 feet to terminals, 12 feet total

1 year warranty

The cord is 6 foot. You can use an appropriate sized extension cord with it. The manual has a chart showing the correct gauge and length.
Full one year home use warranty.

The power cord is about 5' long and the warranty is 1 year.

How long is the power cord? How long is the mfr. warranty?

Price

Battery

Charging

Ease Of Use

Light

Maintainer

Winter

Value

Connection

Ease Of Installation

Quality

Trickling

Cord

Boat

Operation

Motorcycle

Clamps

Mower

Construction

Compact

Attachments

Connectors

Indicator Lights

Appearance

I really like this.  It's easy to use, and connects with ease.  Indicator lights show whether it's accepting a charge or not, so it's easy to know if you didn't connect it properly.  Two modes, 6V and 12V, make for limiting the current easy too.  It was worth the money.

Just good product here-- nothing else to say

There are battery maintainers that go for around $100 or more. So I was skeptical about this one only being $20, but gave it a shot anyway. First thing I notice is the plug accessories which are very cool. The device is simple to use and the most important thing is that it works. Hooked it up to my old jeep (battery was dead) it took about 2 weeks but charged the battery and keeps it charged. So I hooked one up to my boat battery and it was fully charged in 2 days. Will probably get a 3rd for my atv. These things are great and cheap.

Great product

Just had it a few days. Easy to set up. Keeping the battery at its maximum voltage. My battery drained during the Coronavirus quarantine. It was at 2.5 volts (12 volt car battery) The trickle charger manual said it won't at less than 2 Volts. It didn't charge mine at 2.5 volts. So I got a jump and let it idle for an hour and got the voltage up to 12 volts, put on the trickle charger and it started working just fine. It was at max charge the next day.

Easy to setup.

This is a very nice trickle charger.  This is third one that I have purchased.  I use them on my Wave Runners and Motorcycle to keep the battery in good shape.  Before I had these trickle chargers I used to have to replace my Wave runner batteries every season but now they last several years.  I would recommend this trickle charger to anyone that is tired of replacing batteries prematurely

Black & Decker Battery Maintainer

BLACK+DECKER 6V and 12V Battery Charger/Maintainer (BM3B)

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Schumacher SC1282 10-Amp 12V Fully Automatic Battery Charger and Maintainer - New in Box