Model # BM3B

Internet #202710992

Store SKU #273222

BLACK+DECKER 120-Volt Battery Maintainer
0885911216357

BLACK+DECKER

120-Volt Battery Maintainer

$19.97 /each

Frequently Bought Together

Product Overview

The BLACK and DECKER BM3B is ideal for keeping your 6-Volt or 12-Volt battery fully charged when not in use. Simply plug the maintainer into any AC outlet and connect to your battery in any one three ways: Battery clips 12-Volt Dc accessory plug or the battery terminal rings. The BM3B will do the rest of the work, monitoring your battery with the Automatic micro processor, so that you can never over charge the battery.

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Warranty / Certifications

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Customer Questions & Answers

Does this B&D battery maintainer come with the battery clips?

Does this B&D battery maintainer come with the battery clips? They're not shown in the photo. Thanks.
Asked by: Roberto
Yes. It comes with 3 connector choices to charge: traditional battery clips, cigarette lighter, or wired in quick connect.
Answered by: Jeff
Date published: 2017-04-11

May I leave this BM3BC model charger connected and charging for an extended period eg: 6 months?

Asked by: Joe
Yes, but I like to do intermittent charging.
Answered by: Scp720
Date published: 2017-02-08

Can I buy battery clips separate

Asked by: Wes
Battery clips come with the unit. It's a kit.
Answered by: Scp720
Date published: 2017-04-08

I would like to use for my boat batterys.. deep cycle... what are the charging amps???

Asked by: Fireboat
Specs: Input: 120V AC 60HZ 0.3A Output: 6.3V/12.6V DC 1.2A DC Accessory Plug Fuse Optional Accessory) : 5A, 250V
Answered by: Scp720
Date published: 2017-04-07
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Customer Reviews

120-Volt Battery Maintainer is rated 4.6 out of 5 by 57.
Rated 1 out of 5 by from This is not a battery maintainer. This is a battery charger. When connected to a battery that nee... This is not a battery maintainer. This is a battery charger. When connected to a battery that needs charging this unit charges the battery and when the battery is fully charged this unit stops charging. If the battery loses some of the charge, this unit fails to detect the lower voltage and will not automatically recharge the battery. If this unit is disconnected from the battery and then reconnected to the battery this unit detects the lower voltage and starts changing. A battery maintainer should not have to be disconnected. I called the customer service number 1-877-571-2391 and described the problem and I was told to return the unit to the store and buy a different model. A work-around that I use is to plug this unit into a timer that is set to turn off the 120-volt power once a day for at least an hour. This trick ensures that this unit is forced to check the voltage of the battery and charge it if necessary.
Date published: 2017-01-13
Rated 5 out of 5 by from Recommend Great product keeps my battery charged in my old school cutlass thru winter when it's time to go it's fully charged
Date published: 2016-12-13
Rated 3 out of 5 by from This charger will not EASILY charge a dead battery -- the polarity checker stops it if there is l... This charger will not EASILY charge a dead battery -- the polarity checker stops it if there is less than 2V. However, it does charge for about a minute before checking. So... I was able to trick it into charging my totally dead car battery. I let it charge on 12V (green light flashing) until it stopped & red light came on. Then I switched it to 6V (green light solid) until it stopped & red light came back on again. Back to 12V, then 6V, etc. I read a book while doing this. After a couple chapters it had charged enough to stay charging on 6V, so I went inside and ate dinner. When I came back out I switched it to 12V & it continued charging for a book chapter. Hopefully I won't need to do this again as I plan to use this $20 device as intended: easily keeping the car battery charged between infrequent uses. But, in a pinch, with some patience, it can do the work of the more expensive models.
Date published: 2017-04-11
Rated 3 out of 5 by from This charger is basic and is more than adequate for... This charger is basic and is more than adequate for motorcycle use. The clip or harness option is very convenient. If you want a charger that's going to blast your battery full in 15 minutes and then go into trickle mode go elsewhere but if you want a steady charge overnight, this is it.
Date published: 2017-04-07
Rated 5 out of 5 by from WGreat product Very easy to use. Instructions are easy to understand, after following them plugged in the unit and in a few hours my lawn tractor was fully charged. Great product so far, time will tell how well it holds up.
Date published: 2016-11-08
Rated 3 out of 5 by from Ordered for winter to keep battery charged. In instructions says not to use below 40 degrees, lo... Ordered for winter to keep battery charged. In instructions says not to use below 40 degrees, lol, returned, did not use
Date published: 2016-11-30
Rated 4 out of 5 by from Like compact size, glade I got two. Hopefully these will help my boat batteries last longer. Like compact size, glade I got two. Hopefully these will help my boat batteries last longer.
Date published: 2016-11-02
Rated 5 out of 5 by from Product is working great no problems starting the tractors even... Product is working great no problems starting the tractors even after an extended time.
Date published: 2017-03-14
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