Charge, discharge and evaluate lithium-ion aircraft batteries with the easy-to-use TT28-12 True Blue Charger PRO. The TT28-12 is the ONLY battery charger that automatically discharges lithium-ion aircraft batteries to 30% state-of-charge, as required for air shipment. This battery charger 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. Benefits 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 Specifications 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
