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True Blue Power®is a division ofMid-ContinentInstrument Co., Inc. True Blue Power products can be purchased throughMid-Continent’sonline shopping tool at www.mcico.com.

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True Blue Charger PRO

Charge, discharge and evaluate True Blue Power lithium-ion aircraft batteries with the intelligent and easy-to-use TT28-12 True Blue Charger PRO. The ONLY battery charger to automatically discharge lithium-ion aircraft batteries to 30% state-of-charge, as required for air shipment. The True Blue Charger PRO is pre-loaded with all charge and discharge parameters for True Blue Power lithium-ion batteries, allowing maintenance personnel to safely and efficiently top charge batteries and perform scheduled capacity checks. View all Battery Tester Chargers Buy Now


  • Specifically engineered to charge, discharge and test True Blue Power lithium-ion aircraft batteries:
    TB17 (17 amp-hour) TB40 (40 amp-hour)
    TB20 (20 amp-hour) TB44 (46 amp-hour)
    TB30 (30 amp-hour) TB60 (60 amp-hour)
  • Variable Power: 12.5 amps charge (nominal); 60 amps discharge (maximum)
  • Alphanumeric LCD display provides battery mode, current, voltage, temperature and timer
  • Charge, Discharge and Fault LED indicators
  • One-year limited warranty


Model Number TT28-12
Part Number ACM-1260-101
Input Voltage 90 – 132 VAC or 180 – 264 VAC (switch selected)
47 – 63 Hz
Input Power 8.4A at 115 VAC
4.35A at 23 VAC
15A Circuit Breaker
Battery Charge Voltage Lithium-ion; 28.8V (maximum)
Operating Temperature 0°C to +55°C (32°F to 131°F)
Storage Temperature -40°C to +80°C (-40°F to +176°F)
Display Measurement To 0.1 volts, 0.1 amps
Display Accuracy ±0.2 volts, ±0.2 amps
Weight 29.5 lbs (13.4 kg)
Dimensions 6.5” W x 14.5” H x 15” D
Battery Connectors Compatible with MS-3509, 5/16” ring terminals, alligator clamps and temperature cables
Protection and Monitoring Overcharge, over-temperature and time out for failed batteries, auto shut off after top charge is complete and audible alerts for low voltage and reverse polarity


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