Add to cart for current price
Add to Wishlist
Part# 11-14349
MFR Model# 128CEC1-AA-S5



These charger/maintainer/desulfators are designed for all size and type 12-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 our 5-Year “No-Hassle” 100% Warranty. *based on continually maintaining one 125Ah battery.
  • Auto-selection for charge rate and battery types ensures 100% compliance with Concorde® specifications
  • Guaranteed to never overcharge/undercharge. (33°F to 130°F)
  • Push-button Selection for battery types and charge rates
  • Tested and endorsed by Concorde Battery Co. and other leading makers.
  • 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. 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: including but not limited to flooded filler cap, maintenance-free, valve regulated lead-acid (VRLA), sealed lead-acid (SLA), starter, deep cycle and hybrid.
  • Maintain up to 6 batteries at a time. (requires Y-Connector Item # 27879)
  • Auto-Restart after power failure
  • Intrusion protected from water and dust per IEC STANDARD IP65.
  • Bad cell detection with auto-shutdown.
  • 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 Commision 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)
  • 18 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.

* Not for lithium, nickel–cadmium (NiCad), nickel–metal hydride (NiMH) or aircraft batteries.
* Depends on model and connection to batteries in parallel using BatteryMINDer accessory 210AY or customer-provided wiring assembly.
** International Electrotechnical Commission, an international standards organization.

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.

About VDC Electronics:
VDC Electronics, Inc. ( founded in 1993, is a privately held company headquartered in Huntington, NY, USA. We specialize in battery management products designed to improve and extend the life of any/all type lead-acid based batteries through the use of our proprietary design techniques and U.S. patented desulfation circuitry.

We are the leading manufacturer of pulse type battery charger-maintainer-conditioners in the U.S. We are a 100% owned American company founded by personnel, each with over forty years of battery charging design, development and manufacturing experience.



  • Volts: 12V
  • Amps: 8A
  • Power Source: 100 VAC, 50-60Hz
  • Temperature Compensation: Yes: -20°C / -4°F
  • 50° / 122°
  • Warranty: 5 Years
  • Works With: 12V Concorde® Aviation Batteries.
  • Comes with: Auto-Temp Compensation Sensor (Installed), •2' Insulated Battery Clip Cord Set with Quick Connector and 15A replaceable fuse, 2' Ring Terminal Cord Set, Instruction Manual.

In The Box

  • BatteryMINDer 128CEC1-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
  • Accessories
  • Customers Also Viewed
  • Frequently Purchased With
  • Related Items


11 days ago I received the batteryminder and confirmed the unit was the correct one I needed. 8 days ago and hooked everything up as instructed and everything seems to be working fine. It’s been in desulphating mode for the last 6 days

Andrew B Verified Purchase


July 8, 2021

Previously used automotive battery minder. Battery lasted 10 years but when finally went bad, charger kept charging causing lots of boil over and corrosion. This unit should prevent that.

Thomas H Verified Purchase


July 6, 2021

David D Verified Purchase


June 17, 2021

Excellent product. Does the job perfectly as advertised while my engine is off at the overhaul shop

James Verified Purchase


June 16, 2021

Item arrived in good condition. Upon review of information and features It was hooked up to the ships battery and has been on line now a couple of weeks. Seems to operate as advertised. Just pay attention to the several indicators and reread the operating procedure.

Rick S Verified Purchase


June 2, 2021

A great battery maintainer to keep Concorde sealed batteries in good condition. Love the desultification feature.

Richard S
March 25, 2021

My Batteryminder started giving me erroneous indications. I called the company and spoke to Wayne. I described my problems, and he said I am sending you two circuit boards, install the one that fits, and throw the other one away. They arrived in a few days, I installed the proper board and the problems were solved. What a great company!

Greg W
February 25, 2021

Is what I was looking for, works fine. True value will take a lot longer to assess.

February 9, 2021

I have a concord rg25xc battery. The plane sat in annual for almost a month and then would not start during the maint run. Then it would not start during the test flight. Hmmm, must be a bad battery. Wait... the battery is only 1 1/2 years old and checked good at the beginning of the annual. A voltage check showed 12.5 volts after flying, so I decided to have the proper charger used. Wow what a difference, after about a week, the battery shows 12.91 volts and starts easily. Sounds like if you have an airplane you need to charge your battery to keep it up and extend the life of the battery. Long term we shall see, but for now I recommend the appropriate charger for your airplane.

Todd B
February 8, 2021

Quality product that I have used before. Makes it easy to charge and maintain a 12V Concorde battery.

February 1, 2021


Q: I plan to purchase your Battery Minder CEC1-AA-S5. I see that the Concord and Gill batteries need a different charger. What is the reason for this? Am I correct to assume these units units cannot be used to desulfate automotive batteries?

BatterMinder has worked closely with Concorde to design their S5 model and they recommend the S5 as the best unit for Concorde batteries. That does not mean the S2 could not be used. If you have both Gill and Concorde sealed batteries, the S2 can be used for both. I could not find any information for this being used on automotive batteries.

Q: Is it OK to connect the BatteryMinder 128CEC1-AA-5 to the aircraft battery by using the clamps that come with it, and connecting them to the terminals of the Plug & Jump unit, Part 11-00971?

The BatteryMinder is designed to be connected directly to the battery. The Plug and Jump is just for jump starting the aircraft, not battery charging. You can purchase the Interface Cable kit, p/n 11-10835, to hard wire to the aircraft and then you can leave the battery in the aircraft when charging it with the BatteryMinder.

Q: Is the BATTERYMINDER MODEL 128CEC1-AA-S5 12V 2/4/8 AMP CHARGER/MAINTAINER/DESULFATOR the correct Battery Minder for a 12vdc CONCORDE RG-25XC?

That would be the correct charger for all 12 volt Concorde batteries.

Q: I bought this charger for my plane that has a Concorde RG25 battery but I also own a plane with a Gill G25. Although its not specifically designed for it, is it safe to use this charger for the Gill G25?

It is not recommended by either the manufacturer of this unit, or by Gill, to utilize this charger with a Gill battery.

Q: So, based on your answers below, the S2 can be used for both Gill and Concorde batteries, but the S5 can only be used on Concorde batteries?

The S2 is designed for wet and sealed Gill batteries and the S5 is designed for sealed Concorde. I believe you could use the S2 for both but it is not what Concorde recommends, you would be using it at your own risk.

Q: Once a BatteryMinder S5 has fully charged a Concorde battery, if Im doing work in the cockpit and have enough demand turned on to begin discharging the battery, will BatteryMinder automatically revert back to 2D, 2C or 2B modes as necessary to keep up with demand/recharge the battery without rebooting the charger?

Per the manufacturer this unit can remain connected to keep the battery charged, even when using the avionics in the aircraft.

Q: Can I leave the Batteryminder 128CEC1-AA-S5 charger on ALL the time Im not flying?

Yes, it is a float charger so you can leave it charging with out it ever being over charged.

Q: What is the best batteryminder for a 12 volt sealed Gill 7035-28?

128CEC1-AA-S3 (our part number 11-14348.)

Q: Does Battery Minder make a combination 12 /24 volt charger that will work on a 24 volt Gill G-242 battery and also on a 12 volt PowerSafe SBS J16 battery. I noticed the Optimate 7 can charge both 12 and 24 volt batteries and is cheaper but want to buy the best charger available.

Batteryminder does not make a dual voltage option that works with Concorde and Gill batteries.

Q: Does this come with any connectors that allow it to be connected to our RG35A XC Concorde Battery? Like alligator clips or some kind of connector that actually connects to the terminals on the battery, then connects to the BatteryMinder? Thanks!

Yes, it comes with alligator clips with a quick connector.

View in Catalog

View Image View in Catalog