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Microprocessor-Controlled Battery Charger/Maintainer
Item# 92256
Microprocessor-Controlled Battery Charger/Maintainer is rated 4.5 out of 5 by 18.
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Maintain your batteries and save money, time, and frustration with this proprietary microprocessor-based multi-phase charger.More Details+
Price $124.99

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Frequently Bought Together:

Microprocessor-Controlled Battery Charger/Maintainer
Microprocessor-Controlled Battery Charger/Maintainer
Price $124.99
+
Battery Manager V
Battery Manager V
Price $89.99
  • Product Information
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Once you enter your battery type and charge rate, the unit automatically charges your battery to the optimum level and then switches into a maintenance mode to keep it there. The microprocessor manages an enhanced maintenance mode with two unique benefits. Once it detects a full charge it goes into a full rest cycle, letting your battery cool down (not the typical float mode you find with cheaper units), eliminating the chance of losing electrolytes. After the rest cycle it puts a load on the battery for a partial drain to exercise the battery and then recharges it. The unit features reverse polarity protection to prevent shorting the battery, the charger, or even an explosion if the wires accidentally get crossed. A selectable charging rate of 20A/10A/2A can quickly recharge even a large dead battery. For use on any 6- or 12-volt lead-acid car, boat, or power equipment battery you might have, including Conventional, Maintenance Free, AGM, Gel Cell, Spiral Wound, Deep Cycle, and Marine.

  • For use on 6- or 12-volt lead-acid batteries
  • 9" long x 8" wide x 4 1/4" tall
  • 6' power cord length (outlet to charger)
  • 6' cord length from charger to alligator clamps
  • Fully automatic operation, advanced multi-phase charging process
  • 20A/10A/2A charge rates
  • Reverse polarity protection
  • Battery fault detection

Read/download information on using the Battery Charger/Maintainer (Adobe PDF format).

Rated 5 out of 5 by from A quality product! I have been using this quality product from Griots Garage for many years. My two vehicles are low mileage local driving in town usage. Batteries tend to run down with all of the electronics on board. 08 Infiniti G35 Journey sport and 01 Ford EB Expedition 4WD. Today the Ford battery read 0% at about 11.7 volts. This charger brought it back up to 95% and still going. Only issue is at times I have to restart the charger to get it to go 100% full charge on the batteries. I always charge at 20 amps. Still a great product compared with all the cheap imports out there. Thanks a lot Griots Garage. I like your other products too ;) .
Date published: 2017-03-13
Rated 5 out of 5 by from Even better than I expected! A+ I had an AGM battery tested that was fully discharged. The alternator was only partially charging the battery and my mechanic told me I need to fully charge the battery. I thought this Griots charger would be nice to have around so I bought one. I just got it and discovered my batter was at 48% charge! It also shows the voltage on a really nice bright LCD display. From the pictures you can barely see the LCD screen but its actually really nice and bright. It also folds up very nice and compact. It has a cooling fan that turns on to keep things cool. The instructions are ok, but a bit confusing. I would definitely recommend taking 4 minutes to read the instructions and you will be fine. Very nice product!
Date published: 2015-12-17
Rated 5 out of 5 by from Saved my batteries I own a motorhome that has 2 deep discharge batteries for the "house" functions, and a low amperage maintainer did not help the last ones survive some long parking stints. since the batteries are in parallel for a 12 volt circuit I hooked up this unit a few months ago after talking with Griot's about the 2 battery setup. Now I'm preparing for a trip out and checked the electrolytes and everything looks great! I have not tried the restore feature yet because now the batteries stay in excellent condition. I think the exercise function is critical to this result.
Date published: 2014-09-28
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Can you buy cord with alligator clips by itself?

Asked by: Meandjill
We do not offer extra alligator clips for the Battery Charger and Maintainer.
Answered by: GGKayla
Date published: 2015-01-19

How big are the alligator clamps and can they attach vertically as well as horizontally?

Asked by: Mott
The alligator clamps on this unit are 4.25" long x 3.75" at the widest point, and are connected to the unit by a 6' cord. You can hook these to your battery either vertically or horizontally as long as they've got a secure grip!
Answered by: PD_Stevie
Date published: 2019-12-03

Storing a car outside in Florida, can the charging system be powered by solar?

Asked by: JCohen
No this item cannot be powered by solar.
Answered by: GG_Jessica
Date published: 2017-01-02

Does this work from a charge on it or does it need to be connected to an outlet to work

Asked by: Odyssey Bill
The battery controlled Microprocessor charger/maintainer does need to be connected to an outlet.
Answered by: GG_John
Date published: 2019-10-18

does this product reset itself after a power issue/failure when power is restored?

Asked by: Markley
Unfortunately the Microprocessor-Controlled Unit does not have a recovery mode if the power goes out. Our Battery Manager V, item number 92232, features a Recovery Mode that the Microprocessor-Controlled Unit does not. Recovery Mode allows the Battery Manager V to save settings and restart where it left off in the event of a power outage.
Answered by: gg_tatyana
Date published: 2019-12-02

where can I find a manual for this 

Asked by: jim_frisco
You can call our Customer Service Department at 1-800-345-5789 or email us at customerservice@griotsgarage.com to request a .pdf copy of the manual, and one of our Customer Service Representatives will gladly provide you with a copy.
Answered by: gg_Brian
Date published: 2017-07-15

If charger shows "EP" - how long can / should it show "EP" - charging light is flashing and complete (green light) is on - there are no faults or errors. Connected to AGM battery. EP has shown for 24 hours. Thanks

Asked by: Ned of the Northwoods
EP represents the exercising phase and means the battery has reached full charge. During this phase the charging LED should be flashing and the complete LED should be solid.
Answered by: GG_Kimberly
Date published: 2019-09-27

What is the correct charging rate for an AGM battery?

Asked by: ron2950
There is not necessarily a "correct" charging rate for an AGM battery. However, slower charge rates are better for long term health of any battery. Repeatedly charging a battery at a rapid rate may reduce the life of the battery over time. When using the Microprocessor Controlled Battery Charger/Maintainer it is best to use the 2A charging rate whenever possible. In the event that a battery is completely dead or needs to be charged quickly the 10A and 20A charge rates will achieve a full charge in less time.
Answered by: GG_Sam
Date published: 2016-08-20
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