Lithium-ion Aircraft Battery

Part Number
Model Number
Mid-Continent Instruments and Avionics
Technical Description
26.4 VDC, 46 Ah, Lithium-ion, TSO
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Product Description

Reduce your aircraft battery weight by 40% with the TB44 Advanced Lithium-ion Aircraft Battery. Less weight means more passengers, more cargo, more fuel and more design flexibility. The True Blue Power lithium-ion battery is TSO certified, offers 2-year maintenance intervals, and lasts 8 years — 4x longer than lead-acid and NiCad batteries. A built-in heater ensures superior cold weather performance, down to -40°C.

Get started with certified lithium-ion aircraft batteries

Start Lighter

True Blue Power batteries are the lightest and most compact, saving you up to 85 pounds per battery. Our efficient design gives you more power per pound than any other aircraft battery. Less weight means more passengers, more cargo, more fuel, and more design flexibility.

Start Faster

True Blue Power batteries give you cooler and faster engine starts, capable of 7 starts in 7 minutes. Turboprop engines, like the Pratt & Whitney PT6A, start in half the time and, typically, 100° cooler. Our sophisticated design allows your battery to fully recharge within 30 minutes and constant voltage helps eliminate hot starts. An automatic, built-in heater ensures your aircraft outperforms all others in extreme temperatures, from -40°C to +70°C.

Start Smarter

True Blue Power batteries feature overcharge, over-discharge, over-current, short circuit, over-temperature, and under-temperature protection. Even smarter, you’ll save time and money with the longest-lasting aircraft batteries on the market. True Blue Power batteries last 8 years. That’s up to 4x longer than lead acid and NiCad.

Benefits and Specifications
  • 46 amp-hour battery nominal at 23°C/73.4°F
  • Weighs 51.7 lbs. — 40% lighter than lead-acid or nickel-cadmium alternatives
  • Advanced Nanophosphate® lithium-ion cell chemistry — 3x the energy per kilogram when compared to lead-acid and nickel-cadmium cells
  • 7 engine starts in 7 minutes
  • 15 minutes for complete recharge when the battery is fully discharged on a typical aircraft
  • Superior performance at extreme temperatures (-40°C/-40°F to +70°C/+158°F)
  • Automatic internal heater
  • Overcharge, over-discharge, over-current, short circuit, over-temperature and under-temperature protection
  • Communicates ARINC 429 data to the cockpit
  • Higher voltage during engine start — Less wear, less maintenance and increased useful life
  • 2-year maintenance interval —50 – 90% savings on maintenance costs
  • Designed and built in Wichita, Kansas, USA
  • FAA TSO Certified
  • Two-year limited warranty

46 amp-hour nominal at 23°C/73.4°F

Charge Voltage
28 VDC nominal

Output Voltage
26.4 VDC nominal

Output Current
750 A continuous, 1500 A max

Advanced NanoPhosphate® lithium-ion cell chemistry

Overcharge, over-discharge, over-current, short circuit, over-temperature, under-temperature

Energy Density
52.0 Wh/kg
64.6 Wh/liter

Operating Temperature
-40°C to +70°C (-40°F to +158°F)

51.7 lbs. (23.4 kg)

10.9” L x 11.7” W x 10.1” H

8S19P; 8 series cells x 19 parallel modules

2-year maintenance interval; offers 50 – 90% savings on maintenance costs

Battery Life Expectancy
8 years (average)

Powder-coated steel, blue

FAA TSO certified to C179a
ETSO certified to C179a
RTCA DO-311 qualified
RTCA DO-160G qualified
UNDOT/IATA qualified

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