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BatteryMINDer Model 244Cec1-AA-S5 24V 4-Amp Maintenance Charger-Desulfator

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Part# 11-14352


Aviation Calibrated BatteryMINDer, Model 244CEC1-AA-S5 24V 4-AMP Aircraft Battery Maintenance Charger-Desulfator

Works With: CONCORDE® Aviation Batteries

These are designed for all size and type 24-Volt Concorde® Aviation Batteries. If you want the longest possible Life and Performance from your Batteries there is no other product better at doing just this and BatteryMINDer Guarantees it! BatteryMINDers are amongst the highest rated brand of products (4-Star and 5-Star Reviews) in the industry and are backed by a 5-Year “No-Hassle” 100% Warranty.

Note: Three Important Keys To Know

    1. The included battery clips are for temporary or bench connections.
    2. Benefits for max battery life and restored capacity, requires continuous full-time maintenance charging.
    3. For safety and convenience, a quick connection wiring harness to the battery must be installed.
      For experimental aircraft: Model (11-14576) RTA-2415EXP installed by builder.

      For FAA certified aircraft: Model (11-10835) BM-AIK2 installed as minor alteration and return to service with log entry.

  • Guaranteed to never overcharge/undercharge. (33°F to 130°F)
  • Tested and endorsed by Concorde Battery Co. and other leading makers
  • Auto-selection for charge rate and battery types ensures 100% compliance with Concorde® specifications
  • 100% Full - Time U.S. Patented Pulse-type Desulfation keeps battery free of sulfate or dissolves sulfate completely in older batteries
  • Detects and rejects batteries with bad cells with auto-shutdown. Terminate charge to prevent out-gassing
  • Maximize battery life and capacity, recovers weak batteries.
  • Diagnoses battery’s condition / state-of-charge
  • Recovers weak or deeply discharged batteries.
  • Maintain up to 2 Aviation batteries at a time. (requires Y-Connector Item # 27879)
  • Auto-Restart after power failure
  • Intrusion protected from water and dust per IEC STANDARD IP65.
  • Includes Short circuit, spark, reverse polarity protection, thermal runaway protection, automatic D/C disconnect on A/C failure and quick-connect/disconnect fused alligator clip assembly
  • Very high efficiency. California CEC Approved. Certified to California Energy Commission Standards.
  • Automatically detects input AC power.
  • ECO-mode with hi-efficiency / low power consumption. This allows the unit to always remain connected to AC while consuming very low level of electricity.
  • Ambient temperature compensation. Built-in temperature sensor automatically adjusts charge rate to ensure full-charge. (as low as 0°F or as high as 130°F)
  • 12 LED indicators show state-of-charge and important status mode / battery condition.
  • Rugged, vibration-resistant construction.
  • 6' AC cord, 6' DC cord with quick connector (SAE).
  • 1 Year 100% Money Back Guarantee, 5 Year Manufacturer’s “No Hassle” Warranty.

  • Why You Need an Aviation-Specific Charger-Maintainer
    By Bill Woods, VP of VDC Electronics

    If you have been neglecting your battery, not flying as much or just tired of replacing it every 2-3 years, listen up. A good quality aviation specific battery (12-V or 24-V) should give you 5+ years of safe, near full capacity performance, if it is properly maintained. If you think occasionally charging your battery with an automotive or "trickle" charger is all you need to do to keep it healthy, think again. Yes, even a sealed dry "maintenance free" aviation battery needs to be kept at full charge, at all times, to avoid something called "sulfate". What is sulfate? It is the #1 cause of early battery failures, far greater than even vibration, high-low temperatures or contamination. It’s caused by failing to keep a battery fully charged, such as when your flight times are short, i.e. typically less than three hours.

    What’s the Difference?
    An aviation-specific battery is different than auto or marine types. To maximize the cranking amps and reserve capacity, while trying to minimize weight and size, aviation battery manufacturers use a higher specific gravity (SG) electrolyte in their aviation batteries. This "hotter mix" (more H2SO4 [sulfuric acid], less H2O [water]) means it will be overcharged whenever a non-aviation charger is used. Why? Automotive chargers are set at a higher output voltage (typically 13.8 -14.6 volts) than aviation batteries can handle. In addition, they are typically not "at-the-battery" temperature compensated which means the problem becomes even worse as the temperature rises. This results in overcharge, especially in temperatures above 25°C (77°F). In a maintenance type battery (filler caps), the need to add water beyond small amounts every 3-6 months, indicates the battery is being overcharged. Sealed "dry" maintenance-free batteries also lose electrolyte through their venting valve in the form of a vapor-gas. Unlike maintenance types, there is no way to replace it and the battery is on its way to dying, long before it should. Undercharging in cold weather also results when using any type charger that does not compensate for the cold by increasing its output voltage when temperatures drop below 60°F (15.5°C).

    What is the Result?
    When sulfated, a battery can never be fully charged no matter how long it is left connected to a charger.

    The Solution:
    Keep the battery fully charged at all times you are not flying the plane. If the battery is already sulfated, an aviation specific charger with a de-sulfating mode that uses high frequency (not high voltage) will dissolve it, returning the battery to a healthier condition. A full charge, from the right charger, can then be accomplished. How do you know when your battery is sulfated? Simply put a digital voltmeter across the terminals, after the battery has been charged and left "rested’ for at least 12 hours. If the voltage is less than 12.9 (25.8 for a 24-V) the battery is sulfated. It can be reversed (dissolved) with the right charger-desulfator, providing the readings are not less than 12.5 volts (or 25 volts for a 24-V battery).

    Only "at-the battery" temperature sensing charger-maintainers, set to the voltage levels recommended by the aviation battery manufacturer, should be used other than for "jump starts." If other types are used, battery life will be shortened by years with lower cranking amps and reserve capacity. The money you may save, by using a non aviation specific charger-maintainer, will be more than offset by more frequent battery replacements and a less safe battery, due to diminished capacity.

    If you are not getting 5 or more years of 85% or greater capacity from your battery, then you are already paying for the right aviation specific charger-maintainer you could be using to avoid sulfate and extending life and performance. Given the price of batteries vs. the cost of a good aviation specific charger-maintainer-desulfator, is easy to justify.



  • Volts: 24V
  • Amps: 4 Amps
  • Power Source: 100 VAC, 50-60Hz
  • Temperature Compensation: Yes: -20°C / -4°F to 50°C / 122°F
  • Warranty: 5 Years
  • Works With: CONCORDE® Aviation Batteries.
  • Comes with: Auto-Temp Compensation Sensor (Installed), 2' Insulated Battery Clip Cord Set with Quick Connector and 15A replaceable fuse, Instruction Manual

In The Box

  • BatteryMINDer 244CEC1-AA-S5 Maintenance Charger-Desulfator
  • Auto-Temp Compensation Sensor (Installed)
  • 2' Insulated Battery Clip Cord Set with Quick Connector and 15A replaceable fuse
  • Instruction Manual
  • Customers Also Viewed
  • Frequently Purchased With
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Works great. Easy to set up.

Bryan K Verified Purchase


February 17, 2022

This thing is amazing! I bought the 24V model specifically for my Concorde battery in our Bonanza and even though the battery was only about a year and a half old, the battery minder only needed about a week of desulfating and the battery has noticeably more resting voltage and noticeably more voltage while under a load and without the alternator running. A very good investment, especially if you have an engine with a starter adapter mounted, as the higher voltage for the starter motor makes a huge difference for start-up. I highly recommend buying one of these if you are a private owner and live in Canada!

Ryan A Verified Purchase


February 8, 2022

My DA40 prop is off for an overhaul so I took the battery out and put it on this. The instructions seemed a little complicated, but basically you attach to the battery terminals with the included alligator clips and then plug it in. The charger takes care of the rest. I’ll leave the battery connected for the duration of the overhaul and hope to have a better battery when it goes back in the plane. I also bought the airframe interface kit and will get that attached soon - although the Batteryminder manual is a little unclear about whether or not they still recommend charging a battery still in a plane.

John C Verified Purchase


November 2, 2021

This is an awesome product, you have to have it. Cruise Air at Ramona put in the plane hook up.

Richard B Verified Purchase


August 3, 2021

Excellent service with excellent product

Greg M
January 25, 2021

Easy to use, best recommendation to keep the battery up and running at all times.

Michael P
January 19, 2021

great product I will use it a lot

Michael G
November 28, 2020

Works exactly as advertised, great product

Richard M
April 3, 2020

My experience with the battery minder has been 60-80% increase in battery life in my Bonanza.

Frank W
February 6, 2020

Easy to understand instructions. Easy to use. Seems to work great.

John O
September 5, 2019


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: What is the difference between the older model of the Batteryminder 24041-AA+S5 and this new model that is it's replacement 244CEC1-AA-S5?

Per the manufacturer: Our new models feature advancements in easy to understand battery analysis and condition not previously available on any other model. We raised the maintenance float voltage to ensure a more fully charged battery over a full range of temperatures by providing each unit with an ambient battery temperature compensating sensor. Without this type of temperature sensing, batteries can be under-charged in colder temperatures, and over-charged in higher temperatures. These units can now determine the level of charge remaining, and if weak or in need of replacement, before going bad, and can recover weak or severely discharged batteries that other chargers would reject. They are a high efficiency design, controlled by industrially-rated microprocessors, allowing continuous operation (24 hrs./day) for less then $0.43/month.

Q: I have a Concord RG-24-15 battery in my Cessna 182RG. Is the 244CEC1-AA-S5: 24v 4 AMP BatteryMinder the correct and most current BatteryMinder to support the above battery.

Yes that is the correct charger for 24v Concorde batteries.

Q: What is the kind of the Clip Cord that comes the Batteryminder 244CEC1-AA-S5 24V?

It comes with alligator type clips.

Q: Will this work with a RG-126 (3.0 amp 24 volt ) concorde battery?

Per BatteryMinder, yes this will work with the RG-126.

Q: Will this 244CEC1-AA-SS work with my Concorde RG24-15? I have a Slingsby FireflyT67M260 with a standard NATO ground electrical socket for external power. Do you have a plug to connect with the charger?

That is the correct charger for that battery. Batterminder recommends using their interface kit, part number 11-10835. The nato socket in your plane is likely run through the master, requiring it to be switched on to charge the battery.

Q: Looking for a battery minder for my Gill G242 flooded battery?

Please see Part# 11-14350 for the G242 battery.

Q: I own a Robinson R66 helicopter. 24volt system with 3 prong charging for battery or starts. Is the model 244CEC1-aa-s5 the correct battery charger for my R66?

This would work if you had a Concorde battery in the aircraft. It would have to be connected directly to the battery, it will not connect to the 3 prong connector. Keep in mind the charger is battery specific, not aircraft specific.

Q: Is this BatteryMinder 244CEC1-AA-S5 the appropriate Minder for a Concorde RG 380E/60L ?

Yes, this could be used with that battery.

Q: Can the Battery Minder remain plugged in to my hangars 110V while I power up avionics to learn some new features or do I need to unplug the Battery Minder until Im finished and let it recharge the battery over night?

The Battery Minder will not power the panel, so it will not maintain whatever charge the battery has. The battery should be plugged in after use to re-charge the battery to working order.

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