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

Customer reviews

3.54 out of 5stars
(13 reviews)

Most helpful positive review

5.00 out of 5 stars review
Verified Purchaser
07/28/2013
Great product
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.
Outdoorsman603

Most helpful negative review

1.00 out of 5 stars review
Verified Purchaser
12/09/2021
bad description of product
In reading your description of the battery charger I missed the part that said: Features ? Circuit protection against overcharging or short circuit. why did you question this feature? If I had read this before I ordered two (2) of them I would never ordered them. As a result I have two chargers that I now have no confidence in. I already have two chargers that do not support Circuit protection against overcharging or short circuit, so now I have four of them. That is why I gave it a 1 star
billy
14 reviews
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  • 1.00 out of 5 stars review
    Verified Purchaser
    12/09/2021
    bad description of product
    In reading your description of the battery charger I missed the part that said: Features ? Circuit protection against overcharging or short circuit. why did you question this feature? If I had read this before I ordered two (2) of them I would never ordered them. As a result I have two chargers that I now have no confidence in. I already have two chargers that do not support Circuit protection against overcharging or short circuit, so now I have four of them. That is why I gave it a 1 star
    billy
  • 2.00 out of 5 stars review
    Verified Purchaser
    08/26/2021
    wanted to like, but
    2nd use. selector switch broke internally, been charging my car bat at 6v overnight. currently recharging with another to find out if saving $6 cost me $125. B(broken)
    brad
  • 1.00 out of 5 stars review
    Verified Purchaser
    08/24/2021
    Wish I would of bought from ebay
    Didn't receive a complete order wasn't any clamps to attach it to a battery contact Walmart received a return label sent it back but didn't receive a replacement they said they shipped one sure isn't eBay don't think I'll be doing anymore shopping with walmart.com
    Bamb
  • 1.00 out of 5 stars review
    Verified Purchaser
    12/05/2020
    Usee item
    Item was not new. Definitely uswd and would not charge my battery. The product in new condition may have worked better
    Rebecca
  • 1.00 out of 5 stars review
    Verified Purchaser
    05/17/2020
    Don't buy this unit could start a fire!!!
    Had this for a short period of time... The bottom of the case is already melting from the extreme heat inside. This could be a fire hazard... Will return
    Ron
  • 5.00 out of 5 stars review
    Verified Purchaser
    04/14/2020
    Easy to setup.
    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.
    Tom
  • 5.00 out of 5 stars review
    Verified Purchaser
    11/20/2019
    Batteries are in good shape
    I have four of the Battery chargers/Maintainers l keep them on my motorcycle and Rv and Truck and tractor all winter long the batteries are always up never Had any problems with any of them l have three boat batteries Fastened together all three stays up
    TerryL
  • 5.00 out of 5 stars review
    Verified Purchaser
    02/03/2017
    Charger works
    I like the many attachments which make it easy to attach to my generator battery as a way to insure quick starts. Idiot lights show if battery is fully charged or is charging, or if battery is bad or connection is wrong. Good product. My Champion generator battery can only take 1.5 amps so this is pefect.
    MarkS
  • 5.00 out of 5 stars review
    Verified Purchaser
    07/18/2016
    Black & Decker Battery Maintainer
    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
    Dave
  • 5.00 out of 5 stars review
    Verified Purchaser
    06/06/2014
    So far so good.
    I've had the Black and Decker Battery Maintainer running for about a week now and I am, so far, very satisfied with the product. I use three other versions of maintainers, all of which work but are considerably more expensive, to maintain the batteries on my ATV's, motorcycle, boat and RV and so far this maintainer works as well as the others. It offers three connection modes, battery terminal clamps, cigarette lighter plug and hard wire directly to the terminals. I prefer to hard wire directly to the terminals and the quick connect plug makes it a lot easier to disconnect when I am ready to play and reconnect when I'm done. Just remember this is not a battery charger! It will keep a fully charged battery functional and up to capacity but will probably not recharge a low or dead battery.
    easymoney911
  • 5.00 out of 5 stars review
    Verified Purchaser
    05/18/2014
    Inexpensive with options and it works
    I used it under the hood with just the alligator clamps. It maintained the charge just fine. I bought 2 of these because I have two batteries to maintain like the riding tractor that sits idle over the winter. You can use the cigarette lighter in cars and even connect it directly to the battery terminal without the alligator clamps. It certainly beats the other higher price units.
    Harry82
  • 5.00 out of 5 stars review
    Verified Purchaser
    09/04/2013
    Dual Charge Capability and Mulitple Attachments
    For the price this unit delivers. Both in 6 volts and 12 volts. It comes with multiple battery attachments which most of the other units out there do not. I used the permanent attachment on my garaged vehicle which rarely sees the road, and then I have the other two attachments remaining which I can use to 'spot' charge my other vehicle/lawn mower/generator batteries to keep them topped up and in their prime. I purchased this B&D Battery Maintainer due to a dead battery found on my garaged vehicle from less than 2 years new!!! The result of not much vehicle road use and a slow discharge brought the battery down so low it could not recover. Now I can spot charge it and keep it in prime condition and avoid another $120 plus battery purchase. I also have the advantage of using it with the other supplied attachments on my lawn mower, portable generator and other vehicles batteries. A great value.
    Unknown
  • 5.00 out of 5 stars review
    Verified Purchaser
    07/28/2013
    Great product
    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.
    Outdoorsman603