BatteryMINDer 28252-AA-S4 28 VDC Avionics Power Supply & Battery Charger

Because it truly charges aviation specific batteries to 100% capacity, they have the very best chance of passing their annual airworthiness test. With the optional high frequency pulse type desulfation feature, marginal batteries can be safely improved, sufficient to ensure their passing as well.

Its ease of operation (plug 'n run) will be appreciated by both owners and mechanics. Auto input voltage selection, detachable input cord set receptacle and Power Factor Correction (PFC) efficiency allows unit to be used worldwide, automatically adapting to any country's voltage system.

Lightweight (< 8 lbs.), small footprint, large backlit LCD display, cord storage arms and multiple output plug attachment options, make this the easiest to use device of its kind.

We think it is noteworthy to point out the 28252AA-S4 was designed in very close concert with the world's leading aircraft battery manufacturer, here in the U.S.A.

Lastly it is backed by a 5-Year "no hassle" 100% parts and labor warranty.

Using an array of microprocessor controlled sensors, BatteryMINDer Model 28252-AA actively monitors your battery's voltage, amperage acceptance and temperature at all times. Working through a series of charging and diagnostics stages, the internal program adjusts its output several times a second based on sensor reading to quickly and correctly charge your battery. When used as a maintainer, the BatteryMINDer is guaranteed to maximize your battery's life and storage capacity. The temperature compensated long-term float (maintenance) stage can add years of service, and patented high frequency sweep pulse desulfation is designed to reverse and eliminate battery sulfation, the #1 cause of early battery failure.

BatteryMINDer Model 28252-AA supplies up to 25 amps of ground power from 100-240 VAC, as far as 300 feet (91.44 meters) from the source. Approved by the major aircraft battery manufacturers in the U.S., it safely charges all sizes, types and brands 24 Volt lead-acid aviation batteries. Dedicated desulfation, optional equalization and long-term float (maintenance) mode help recover lost capacity enabling many marginal batteries to pass the FAA airworthiness test. Power supply mode enables use of glass panel displays and other avionic electronics without draining your battery.

Included Accessories:

• 9" Battery Clip Cord Set with Anderson 50 Connection
• 14' 10 Gauge DC Extension with Anderson 50 Connections
• 15' Ring Mounted Temperature Sensor

When batteries are improperly maintained (over-under charged or left uncharged for extended periods) small crystals of sulfuric acid from the battery’s electrolyte (liquid or paste) form on the battery’s charge plates. They act as a resistor (barrier) preventing the battery from ever again accepting a full charge, no matter how long a charging source may be connected. Once this occurs, the cranking power of the battery is severely reduced, as well as its life. Aviation batteries are affected the most because they have been designed for maximum performance in the smallest-lightest case possible.

VDC Electronics has developed simple, but highly effective circuitry, able to safely dissolve sulfation, restoring much, if not all, of the lost power, providing the battery’s cells are not shorted or structurally damaged. This U.S. Patented approach is believed to be the most effective method for eliminating even the oldest hardened sulfate. By generating safe, wide-band, random frequency electronic pulses, we are able to cover the full range of sulfate crystals sizes, in the shortest possible time. Depending on the amount of sulfate and its age, complete de-sulfationcan occur within several days to several weeks. De-sulfation takes place automatically, while the battery is being bulk or maintenance level charged.

Note: Both BatteryMINDer models (12-V or 24-V) provide "full-time" de-sulfation. We guarantee to safely eliminate all sulfate from any non-commercial aviation battery meeting the criteria clearly stated in our Instruction Manuals.

Why is the BatteryMINDer® desulfation method unique?

Sulfation, the number one cause of early battery failures, can be safely reversed, using high frequency electronic pulses. Unlike other pulse type chargers that claim this or similar sounding features, VDC’s BatteryMINDers® use a range of high frequencies. This ensures both old and newly formed sulfation will be safely dissolved in the shortest possible time. Using just one fixed frequency may remove some, but not all, especially long established – hardened sulfate crystals.

Our U.S. Patented methods are truly unique. We "dissolve" the sulfate rather than "destroying" or shaking it loose. By generating just the needed range of frequencies and avoiding high voltages, we eliminate potential damage to the batteries storage plates known as "flaking". The sulfuric acid, the major ingredient in a sulfate crystal, can then easily pass into the electrolyte (liquid, gel or absorbed type). This immediately raises its specific gravity and frees the storage plates to now accept a fuller charge. It does this in theshortest possible time, without developing excessive heat. No loss of electrolyte takes place in this process, thus ensuring sealed batteries, as well as "wet", never die due to loss of electrolyte.

Several charger companies claim a battery will not develop sulfation, if it is always kept fully charged. This is incorrect. All lead-acid storage batteries will develop sulphate during their life time. This includes the new sealed "dry" such as Optima, Odyssey, Exide and Interstate branded AGM-spiral-wound types. Batteries develop sulfation each time they are used (discharged – recharged). If they are overcharged or undercharged or left discharged, some for even just several days, they will rapidly develop sulfate. Even when stored fully charged, sulfate will form, without a frequently applied maintenance charge. It must be charged enough to prevent the battery from dropping below 12.4-Volts (2.07-volts / cell). Using or storing batteries in temperatures above 75°F accelerates the rate of self-discharge and increases sulfation dramatically. In fact, the discharge rate doubles, as does sulfation, for every 10°F rise above room temperature.

In summary, if you want your batteries to deliver the very best performance and havethe longest possible life, they must be kept free of sulphate by desulfating them in the safest, most effective way. BatteryMINDers® U.S. Patented method is this most effective way and VDC Electronics guarantees it with a 100% Money Back Guarantee plus a 5 year "no hassle" full warranty.

Here are the questions you should be asking yourself:

When a change from the standard mode is required, simply instructions (printed on unit's top label) clearly show how dip switches (2) need to be reset. A small "special head" screw driver bit is included with each unit to perform this action. These instructions are also repeated in the revised instruction manual included with each unit.

• Guaranteed to never overcharge.
• Power glass panel avionics 24/7, without draining your battery.
• Precision settings for Standard Aviation, Concorde and AGM "Pure Lead" Aviation Batteries (Gill 7000 Series, Odyssey and Hawker).
• Worldwide automatic voltage capability (100-240 VAC 50/60 Hz).
• Easily exchangeable IEC input power cord (ships with North American style, call for options).
• High powered high frequency pulse desulfation mode.
• Optional modified equalization mode.
• Maximize battery life and capacity, recondition weak batteries including many failing the FAA capacity test.
• Temperature compensation ensures proper charge in hot or cold environments.
• Simple push button operation.
• Microprocessor controlled.
• LCD panel displays voltage, amperage, amp-hours and temperature.
• Maintain up to 50 batteries at a time.
• Extremely efficiency, low operating costs.
• Automatic disconnect and resume if AC power is interrupted.
• Short circuit, spark, polarity and thermal runaway protection.
• Lightweight compact design, less than 8 lbs.
• 6' AC cord, 14' DC cord with Anderson 50 connections (SB50).
• 1 year 100% money back guarantee, 5 year "no hassle" warranty.