Best Jump Starter Guide

April 16, 2024


Black & Decker BM3B 6V and 12V Battery Charger / Maintainer Review

Black & Decker BM3B 6V and 12V Battery Charger MaintainerWelcome to our review of the Black and Decker 6 volt and 12 volt battery charger and maintainer.  The BM3B is one of the lowest cost products of this type.  Read on to decide if the features and function of this small charger will suit your needs.  The first area of discussion will be the features.

Buy The Black & Decker BM3B 6V and 12V Battery Charger / Maintainer Now

What Are The Features Of The Black And Decker Battery 6V / 12VCharger Maintainer?

Here is what you get with this battery trickle charger:

-Battery Maintainer for use on 6V & 12V battery systems

-Easy connection to vehicle battery using the included battery clips, O-ring terminals or vehicle DC plug

-High-frequency smart charging technology keeps batteries at optimal charge

-Automatically switches between charging mode and float mode monitoring

-Built-in mounting bracket

Yes, there are still plenty of 6 volt battery systems out there.  This is a bonus in that the BM3B can be used for eitherBlack & Decker BM3B 6V and 12V BatteryChargerMaintainer 6v or 12v batteries.  You get several different ways to connect this car battery charger to the vehicle including plugging it right into the cigarette lighter.  Electricity can flow either way along the wiring so using the DC plug that still comes with most cars may be the simplest way to charge or maintain you battery.

Of course most vehicles other than cars and trucks do not come with a cigarette lighter.  Most motorcycles, PWC’s, snowmobiles, etc will need to be connected the old fashioned way.  Fortunately with this little Black and Decker you get standard clips along with o-ring terminals that you can leave on long term with vehicles that are not used frequently.

Buy The Black & Decker BM3B 6V and 12V Battery Charger / Maintainer Now

As with most charger/ maintainers, the switch between charging and maintaining your battery is done automatically to prevent over charging.  You also get a built in bracket to permanently attach the charger to any vehicle that sits for long periods of time without being started.  Many of us buy a toy with the intent to use it all the time then you realize life gets in the way.  With this Black and Decker 6/12 volt battery charger, your toy will be ready whenever you are.

Watch our live Google Hangout:

How Does The Black & Decker Charger Work?

This is always an important question to look at.  Features are great, but features won’t keep your boat’s battery charged all winter.  The BM3B works great as a charger as long as your battery is not completely dead or you are not in a hurry.  With 1.5 AMPS available, this unit is more geared towards the maintaining side rather than the charging side.  There are many more powerful battery chargers available, but they won’t fit under your hood and mount so you can leave them in place full time.

There are also many comments on blogs as well as Amazon about the value provided for the price.  Some people were skeptical because of the low price but then came back to report excellent results.

Buy The Black & Decker BM3B 6V and 12V Battery Charger / Maintainer Now

Watch our Slideshare presentation:

What Is The Verdict On The BM3B Battery Charger And Maintainer?

The most important factor to consider before buying the Black & Decker BM3B 6V and 12V Battery Charger / Maintainer is what do you need a charger for?  There are many different types of car chargers, each one suited to a different purpose.  The purpose of this trickle charger is to top off a low battery and keep it at maximum performance without over charging and burning it out.  If this is what you are looking for, then this is a great buy.  If you want a super powerful battery charger for quick charges, then this would not be the charger for you.  So, you tell me, is this a buy or a no buy?

As an alternative, you may also want to check out either the Battery Tender 021-1163 5W Solar Maintainer or the Battery Tender Junior 12V Battery Charger which offer a 12 volt option only.

What Do Customers Say About the Black & Decker?

by H. Stewart

We purchased the JNC300XL about a year ago to power a camera system we were developing for a truck. We needed 12Vdc vehicle power while in the lab and in the field for testing off the vehicle. It charges quickly, holds a charge for months and is light and compact. Last summer my wife called to say she was first in a left turn lane on a busy expressway and her car stalled and would not start. I grabbed to JNC300XL where it had set for months without a charge and off I went. I connected it to her battery and it provided plenty of power to turn over her fair sized V6 engine and start the car. The nice thing is it was a quick hook up. I wasn’t in the middle of a busy road trying to get my car close enough to her car to string a couple of jumper cables. It is great Read more…

by Gary London

I already had a JNC 660 for my truck and wanted to put smaller units in each of our cars. I bought 3 of these, then 2 more for Christmas gifts. They are easy to use and much more dependable than the cheap imports with lots of whistles and bells…. I prefer the larger unit for my dodge 1500 with a V-8 (I’ve jumped it 5 or 6 times between charges without a problem… Read more…