BatteryMINDer® 128CEC2-AA-S2 12V 8A Gill® Aviation Battery Charger/Maintainer/Desulfator
128CEC2-AA-S2 is a 12V - 8A CEC2 Charger/Maintainer for Gill Batteries
Features & Benefits:
BatteryMINDer® Model 128CEC2-AA-S2: 12V 8 AMP GILL® Aircraft Battery Charger-Maintainer-Desulfator
These chargers-maintainers-desulfators are designed for all 12V GILL® G series and LT 7000 series. 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 among 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.
NOTE: NONE OF OUR AIRCRAFT MODELS ARE DESIGNED TO FUNCTION AT INPUT VOLTAGES ABOVE 120 VAC EXCEPT WHEN COMBINED WITH AN ISOLATION STEP-DOWN TRANSFORMER.
• Guaranteed to never overcharge/undercharge. (33°F to 130°F)
• Tested and endorsed by leading Battery 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 2 batteries at a time (requires BatteryMINDer® Y-Connector Accessory 210-AY).
• Auto-Restart after power failure.
• 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 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.
• Never connect two or more batteries together before fully charging each and checking their condition. Failure to fully charge each battery and check their condition can result in a serious safety hazard.
What's in the Box
• Model 128CEC2-AA-S2 Charger-Maintainer-Desulfator
• 6' AC cord, 6' DC cord with quick connector (SAE)
• Auto-Temp Compensation Sensor (Installed)
• 2' Insulated Battery Clip Cord Set with Quick Connector and 15A replaceable fuse
| General Information | |
|---|---|
| Part # | 128CEC2-AA-S2 |
| Manufacturer | BatteryMINDer |
| Shipping Information | |
|---|---|
| Product Weight | 3.24 lbs. |
| Product Dimensions | 13 x 12 x 4 in. |
| Schedule B | 8504409520 |
| ECCN | EAR99 |
| Specifications | |
|---|---|
| Charging Current | 8 AMP |
| 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 |
| International Standard | IP64, Dust tight |
| Multiple Batteries (#) | 2 |
| Optional Accessories | 210AY, 210RT, ABS-248, ATS-1, BCAA, BM-AIK2, DCE12, DCE25, RTA-2415EXP, VPP12 |
| Overcharge Protection | Yes |
| Polarity Reversal Protection | Yes |
| Power Source | 90-140 VAC, 47-63 Hz |
| Product Dimensions | 4.9” L x 7.3” W x 2.1” H |
| Temperature Compensation | Yes, -4°F (-20°C) to 122°F (50°C) |
| Voltage | 12V |
| Warranty | 5 Year |
| Works With | All GILL® G Series Including LT 7000 Series |
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AIRCRAFT COMPATIBILITY
This item is for use on all aircraft.
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QUESTIONS & ANSWERS
The 128CEC2-AA-S2 is calibrated for Gill sealed (non-LT/7000) and flooded wet-cell batteries, as well as Concorde flooded batteries. Using a battery-specific aviation charger ensures proper charge and float voltages for Gill chemistry. This helps maintain FAA-compliant battery performance and extends service life in piston and turbine aircraft applications.
The instruction manual emphasizes qualifying (testing) a battery before charging or desulfating to ensure it is serviceable. Even new aviation batteries may have experienced sulfation from improper storage. Verifying open-circuit voltage and condition before charging helps prevent wasted time on batteries that are already beyond recovery.
If the battery voltage is low at startup, the charger enters Soft-Start mode to gently raise the voltage before applying full current. If the voltage is below the minimum thresholds, the unit may reject the battery to prevent unsafe charging. This protective logic safeguards both the battery and the aircraft's electrical system.
The charger automatically transitions through Soft-Start, Constant Current (Bulk), Constant Voltage (Absorption), Battery Test, and Float (Maintenance) stages. Each phase carefully manages current and voltage to maximize capacity while preventing overcharge. This multi-stage process is critical for maintaining aviation battery reliability between flights.
The integrated Ambient Temperature Sensor (ATS-1) adjusts the charging voltage based on the surrounding temperature. Charge and float voltages vary with temperature to prevent overcharging in hot conditions or undercharging in cold conditions. This is especially important for aircraft stored in unheated hangars or exposed to seasonal extremes.
Yes, once fully charged, the unit automatically enters Float (Maintenance) mode. In this stage, it actively maintains the battery at optimal voltage to prevent sulfation. Continuous maintenance is recommended for aircraft that are flown infrequently to preserve battery airworthiness.
The LED indicator table shows that a flashing red “Bad Cell” light indicates one or more dead cells. An amber “Battery Weak” indicator signals low voltage after testing. These diagnostics allow technicians to quickly determine whether a Gill battery can be recovered or should be replaced.
Avoid charging in tightly confined areas due to the potential for hydrogen gas buildup. Follow the battery manufacturer’s FAA-approved Instructions for Continued Airworthiness (ICA). Proper ventilation and correct polarity connections are critical for safe aircraft battery maintenance.
The 128CEC2-AA-S2 can maintain up to two fully healthy batteries if each has been individually tested and fully desulfated. The manual cautions against attempting to desulfate multiple batteries at once. Using approved Y-connectors ensures balanced maintenance charging.
A rested 12V battery should measure approximately 12.9 to 13.1 volts at full capacity. Voltages below 12.4V may indicate 50% charge or sulfation. Measuring voltage after an 8- to 12-hour rest period ensures accurate assessment of battery condition.
