Battery MINDer 12v Charger Maintainer Conditioner BM12248
This Qualifies for FLAT RATE Shipping of $7.50 per order*
This is a BatteryStuff best pick. One of the most feature-filled, versatile units we carry, and priced well below suggested retail!
Battery MINDer 12v Charger Maintainer Conditioner BM12248
Battery MINDer Charger/Maintainer/Desulfator-Conditioner charges, maintains, and conditions all types of 12 volt batteries. 2, 4, or 8 amps of available charge current combined with a unique patented Pulse Mode circuitry that restores older batteries that are noticeably declining in performance caused by sulfation. This is an excellent unit for all sizes and types of lead acid batteries up to 200% faster charging than conventional constant voltage chargers. For use in long term battery storage/maintenance mode, will not overcharge batteries.
The Battery MINDer is a 3-stage charger/maintainer/desulfator-conditioner that extends performance and life of all types of 12 Volt lead acid batteries. These include maintenance-free, marine, sealed Gel Cell, AGM, dry and valve-regulated batteries.
Battery MINDer is highly recommended for batteries that have been neglected and abused.
Each Battery MINDer ships with one quick disconnect ring set and alligator clips. The Battery MINDer does have an ambient temperature sensor on the unit. The optional Battery MINDer Temperature Probe Extention Cable is available for purchase, and enables the charger to sense the temperature of the battery.
- Maximizes life and performance of all Lead Acid Batteries regardless of size/type/brand.
- Automatically detects defective batteries and rejects them.
- Push button selectable battery type/charge current/battery conditioner.
- Watertight enclosure with conformal-coated protected circuitry.
- Built-in battery indicators: charge level/charge retention/sulfation indicator.
- Automatic temperature compensation with battery temperature sensor
- Full time random sweep desulfation
- Polarity reversal error indicator
- Portable or onboard mountable
- AC cord 6 feet, DC cord 8 feet overall with supplied connectors
- Optimal 3 Step Charging
- Built-in Mode Indicators
- Spark Free Hook Up
- Reverse Polarity Protection
- Short Circuit Protection
- Thermal Protection
- Temperature Compensation
- 5 Year Warranty
Due to the different battery type setting the output voltages will vary depending on the battery type you select. The BatteryMINDer is one of the most advanced battery chargers on the market today. * Flat Rate shipping is for the lower 48 states only.
Most Helpful Customer Reviews
battery charger 12248
By rab on Nov 24, 2011, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(93 of 187 customers found this review helpful)
Pros: going to install at christmas hollidays when not attending collage in my communications bunker/ loft. as a float system and desulpher on my back up battery .
Cons: dont see any as i read the operating manuel sute me to a t
Other Thoughts: as i said to robin i will be doing more transictions when i get time to look through your prouducts. excellent service received the parcel 6 days after placeing order.looking forward to doing buisines again your faithully r sinclair y
ease of use
By Anonymous on Jul 08, 2012, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(91 of 179 customers found this review helpful)
Pros: simple directions, charged 3 r.v. batteries and lawn mower battery for the 72hr. period. So now we\'ll see.
Cons: too early to tell
Problem with default
By hpcop on Jul 28, 2012, Ownership: Use regularly, Knowledge Level: AC/DC is more than a band
(99 of 185 customers found this review helpful)
Pros: Does a good job of maintaining when your able to keep an eye on it.
Cons: My motorhome is stored away from my home when it's not in use. I keep this maintainer hooked up while it's in storage. The problem is that if my storage area ever has a power outage, this maintainer defaults to a "gel" mode when power is restored. My batteries are "wet" lead-acid batteries. I'm not sure how this affects how they charge, but there must be a reason that it lets you select gel, AGM, or wet.
Battery Minder BM12248
By Bill on Nov 24, 2011, Ownership: Use regularly, Knowledge Level: AC/DC is more than a band
(118 of 203 customers found this review helpful)
Pros: Safe, simple, easy to use with an understandable instruction manual.
Cons: In time it will revert to "Gel" setting from "Flooded" setting
Other Thoughts: I have been a graduate electrical engineer and Ham for over 50 years so I chose this unit carefully. I use one at home, purchased one for the local Red Cross to keep their radio system ready, and two Ham friends bought them at my recommendations..We all like them. The units work as advertised and keep batteries in top shape. I use it to keep the 12v deep discharge batteries for my Ham station in top shape and move it from car, RV, or motor scooter as needed. Just works all the time.
PLEASE HELP SAVE THE OPTIMAs
By Bluto on Dec 06, 2011, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(106 of 190 customers found this review helpful)
Pros: Easy to use - self-explanatory labeling Ancillary components included WORKS WELL (brings Optimas back to life)
Cons: If cost is no object..... (but when is cost NOT an object?)
Other Thoughts: Between my brothers and myself we have a bunch of Optimas, some that see regular use, some that do not. When the redtops in my older Dodge diesel started to show their age (5 years old now) I decided we really needed something to desulphate an AGM. I have had a 12117 for 4 or 5 years, but never used it on an Optima, so I knew what they could do on a flooded battery. This one works great on AGMs. I added an ODB-12 on my truck for longterm use and hooked up the 12248 for a week and it acts like it has new batteries in it now. The tractor is hooked up now and the rv batteries are next in line. It will stay busy. Best buy for maintenance I have made in a while.
By Joe on Jul 18, 2012, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(102 of 186 customers found this review helpful)
Pros: I haven't been able to resurrect an old battery (yet) but I'm convinced that this charger is trying hard and is the most sophisticated charger I've ever owned.
Cons: None so far
By Chris on Jun 12, 2012, Ownership: Just Bought, Knowledge Level: Genius is my way of life
(97 of 181 customers found this review helpful)
Pros: I am the Director of Operations at a large senior care facility. It is very difficult to tell if electric wheel chair batteries are bad or not. This device is what we have needed to diagnose these problems. We spend a lot of money on mobility scooter repairs. The device is well thought out and provides a good indication of battery condition.
Cons: Being color blind using more LED's in place of multicolor LED's would have been a better choice
Other Thoughts: Any electrically savy person would find this device of benefit in the testing of Lead Acid Batteries of all types!
BM12248 IS A WINNER
By Bob on Apr 23, 2012, Ownership: Use regularly, Knowledge Level: Genius is my way of life
(104 of 186 customers found this review helpful)
Pros: It doesn\\\'t got better than this. The BM12248 meets all its design perameters as described. it\\\'s compact, runs cool, and has brought back several 6-7 y/o, weak AGM batteries to full 100% charge and life. Remarkably, standing storage capacity, or, voltage retention over time characteristic as well as power delivery appear to be fully restored! Temperature sensor should be utilized on small to medium multi -cell AGM and Gel type batteries on four to eight ampere setting. It is unnecessary on large 60 AH+ batteries at the maximum 8 amp trickle charge rate rate of this unit. Be sure to bolt, clamp or securely tape sensor ring directly to the positive post of the battery being charged. Do not attempt to charge more than one battery at a time. However, fully charged multiple batteries of the same type (charactistic and voltage) may be maintained in parellel configuration (+ to + and - to -). Ampere hour capacity is critical even in the maintainance mode, as large batteries drop more quickly than small ones. Again, be sure ALL batteries are FULLY charged first. As a rule of thumb, never exceed four to six batteries in parellel per charger.
Cons: Discerning between light colors will be difficult if you are visually color deficient. Ordinary red -green 3-D movie viewing glasses easily resolves this problem. Simply look through one lens at a time to determine color.
BM12248 Charger Review
By Tom on May 09, 2012, Ownership: Use regularly, Knowledge Level: Electricity doesn't scare me.. usually
(98 of 180 customers found this review helpful)
Pros: I purchased this charger for the AGM battery bank I have in my boat. The boat has a charger but now and again I have need to charge individual batteries. This charger is perfect for that job. Good price...quick delivery...robust charger. I would recommend.
By N2netr on Oct 09, 2013, Ownership: Use regularly, Knowledge Level: AC/DC is more than a band
(91 of 173 customers found this review helpful)
Pros: This charger, maintainer does exactly what it claims to do, if you take the time to read the instructions to familiarize yourself with its operation, it almost as simple as attaching it and plugging it in. I use it to maintain a charge on a bank of (6) AGM batteries that I keep for power outages, it gives me peace of mind to know that they are ready to go at a moments notice.
Cons: The only con I would give this unit is that in the event of a power outage, it defaults to Gel type battery setting, while not critical, you do have to unplug and reset it to the proper battery type each time the power out.
By pb on Jan 19, 2013, Ownership: When it goes, I'm giving it a eulogy, Knowledge Level: Genius is my way of life
(99 of 180 customers found this review helpful)
Pros: i won't say it's the best device because i'm sure for more $$ there always is something better, but for the price, the 5 year warranty, and the good people @ VDC in New York!
Cons: i paid more 5 years ago from another seller.
Other Thoughts: for the guy complaining about defaulting to GEL after a power outage, IC what they are, and this being multifunction, if you RTFM you'd know GEL is the least harmful float charge V. no it's not where FLA should be set at but in your circumstance maybe visit once a week? after owning 1 for over 4 years it begun to restart every 3 minutes. call VDC, got my RMA, sent it, got a call from their repair, and got my replacment within 10 business days. when this thing craps out i'll be upset.
By firstname.lastname@example.org on Oct 12, 2012, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(98 of 179 customers found this review helpful)
Pros: I have saved 4 batteries from the dead already it works great
Cons: Wish it had a battery tester incorporated into it. for volts and loads test.
By graysailor on Jun 28, 2012, Ownership: Just Bought, Knowledge Level: I know what an outlet is
(97 of 178 customers found this review helpful)
Pros: I was having difficulty with my previous charger keeping my Optima battery charged. It would overcharge to the point where the charger and the battery were almost too hot to touch. I installed the BM12248 and within 24 hours my battery was charged and has remained charged.
Cons: None at this time.
Other Thoughts: Good product. I like the feature where you can set the amps and the type of battery that you are charging.
By Dave on Aug 04, 2013, Ownership: Use regularly, Knowledge Level: AC/DC is more than a band
(97 of 177 customers found this review helpful)
Pros: In 2008 I purchased a BatteryMINDer 12248 charger-desulfator. In 2013 I purchased a second, as an addition - not a replacement. That should tell you how well I like this unit. I have seen my automobile battery show improvement on the dealer's test after using the 12248. In 2005 I bought a used tractor with a battery that was tilted and of unknown age/condition. I leveled the battery and in 2008 began using a BatteryMINDer charger/desulfator on it. The battery still starts the diesel engine on the first crank eight years after I bought it. In addition to maintaining and reconditioning batteries, this unit has the flexibility of charging at 2, 4, or 8 amperes, which makes it quite flexible. I sometimes use it to maintain batteries as small as 17 Ah, and as large as 100 Ah, so having the range of current capacity is a big plus for me, along with its ability to restore and maintain the batteries. Service from BatteryStuff has been great.
Cons: The 2013 unit came with the same Instruction Manual as for the 2008 unit, although a couple of minor changes had been made in its construction and operation. But see Other thoughts below.
Other Thoughts: When I checked online with VDC, they said the new manual was under construction. I checked again yesterday, and the new Instruction Manual is now available online. One thing I noticed was that the new chart of charge and float voltages vs. temperatures on p. 19 does not agree very well with the charts in the older manuals, and is not referenced as are the older charts. I have a lot of experience using the charger and measuring charging and float voltage with a good (Fluke 87) multimeter. My measurements for AGM batteries are much closer to the voltages in the older manual than in the new online manual. For example, at 78°F, I measure a float of 13.45V for an AGM battery, which agrees with the old manual's 13.4V (optimum)/13.7V (maximum). But the new online chart says 14.0V Float (Flooded 13.4V + 0.6V for AGM). 14.0V is higher than the charger is working, and not correct.
Excellent Smart Battery Charger
By Track Junkie on Mar 19, 2014, Ownership: Use regularly, Knowledge Level: Genius is my way of life
(93 of 173 customers found this review helpful)
Pros: The Battery Minder model 12248 is a top-of-the-line intelligent battery charger with an excellent warranty. I have tested it on conventional wet cell, AGM and maintenance free calcium-lead automotive style batteries. In every case it provided the correct absorption and float voltages so the batteries achieved full charge without over-charging as some of the so called "smart" chargers that I have tested do. The fact that the Battery Minder 12248 also has a temperature sensor to adjust the charging voltages for variations in ambient temp is extremely important. Battery manufacturers tell you the proper adjustment that must be mmade in charging voltages to prevent under or over-charged batteries. In cold weather you may need in excess of 15v to fully charge a typical 12v auto battery. In hot weather you need to lower the voltage to keep from "cooking" the battery. The Battery Minder 12248 does the voltage correction automatically with the temp sensor so it's just plug and play.
Cons: Battery Minder is designed by VDC electronics who appears to be a very competent electronics company. They could use some improvement in their customer support however, IMO. Their response time on e-mail is generally 3-5 days which is far too long for tech questions. In addition they tend to reply with sales gibberish instead of technical answers. You almost have to pull the information out of them over multiple e-mails which drags out to several weeks. If their is a weather issue in their area - like a snow storm, they don't respond for an additional 3-5 days. With modern tech they should certainly be able to work from home to answer customer support e-mail if they can't drive into work.
Other Thoughts: The Battery Minder 12248 has a one year Unconditional Money Back Guarantee and a five year limited warranty. This is good customer support, IMO. I have tested some other so called "smart" chargers that were not smart at all and over or under-charged a number of batteries. I returned these as they were unacceptable contrary to the claims that they were "suitable for all lead acid batteries". While the Battery Minder 12248 costs more than the cheaper highly advertised not so "smart" chargers, the BM 12248 is the real deal and the one you want if you want to be able to fully charge but not over-charge any lead acid battery including AGM style batteries. The 12248 has three current ranges 2-4-8 amps so you can charge larger batteries faster if need be or just use the 2 amp. setting for maintenance free float to keep several batteries at full charge. The Battery Minder 12248 is so good I bought a second one. If you're only going to have one battery charger, the BM 12248 is the one that you want based on my experience with numerous conventional and smart chargers.
Very flexible, Great quality
By Anonymous on May 30, 2012, Ownership: Just Bought, Knowledge Level: AC/DC is more than a band
(93 of 173 customers found this review helpful)
Pros: Very flexible for almost any Lead-Acid battery type Temp sensor is VERY IMPORTANT and a great feature The leads are high quality
Cons: the 2a setting is a little too much for 7.5ah SLA's - That's not really a con of the charger so much, as those are rated for 300-700ma, but I was hoping I could use it with batteries that small. The 2a setting worked great for a parallel set of 3 7.5ah batteries though.
Other Thoughts: James at BatteryStuff was very helpful and responsive with my few emailed questions. Very patient guy.
By Chuck on Mar 27, 2014, Ownership: Use regularly, Knowledge Level: Genius is my way of life
(91 of 170 customers found this review helpful)
Pros: I have 2 BM12248's and they sure are handy. I wasn't aware that pulse voltage (equalizing) damaged lead plates, but learning about BatteryMINDer's special variable electronic frequency desulfating feature now has me convinced this is the way to go for SAFELY equalizing a lead-acid battery. This charger lets me know quickly if a battery is no good to begin with - it simply tests it then blinks red to let me know I'm wasting my time trying to save it. I intend to buy the 2-volt version for maintaining strings of charged. batteries.
Cons: No cons.
Review Summary4.76 Average Rating
Rated 4.76/5 Stars from 17 customer reviews.
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Shipping Weight (lb.) 4
Max Current, During Bulk Charge 8 A
Absorption Voltage Variable
AC Input Amps 1.8 A
AC Input Volts 120 V
AC Input Volts Freq. 50/60 Hz
AC Input Volts Range 90–140 V
Desulphation Pulse 100 +/-10 Hz
Float Current Variable
Float Voltage Variable
Storage Temperature -10° to 80° C
Over Temperature auto-reset thermal breaker
Output Banks 1
Temperature Compensation At battery temp sensor
Regulatory Approval Built to UL 1236 standards
Ripple 65mA (AC)
Manufacturer: BatteryMINDer/VDC Electronics
Manufacturer Part #: BM12248
Made In: Asia
Order Line: 1-800-362-5397
M–F 6am–5pm PST
Tech Help: 541-474-4421
276 Tech Way, Suite A
Grants Pass, OR 97526