6430044-2 Lithium-ion Aircraft Battery
Model Number: TB44
Technical Description
26.4 VDC, 46 Ah, Lithium-ion, TSO
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.
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 provide constant monitoring, protection, and capacity data. Our proprietary Battery Management System is exclusive to True Blue Power and has been validated by the most demanding aircraft manufacturers. Even smarter, you’ll save time and money with the longest-lasting, maintenance-free aircraft batteries on the market. Gen5 batteries require no capacity checks and last 8 years. That’s up to 4x longer than lead acid and NiCad.
Benefits
- 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
Specifications
Capacity
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
Technology
Advanced NanoPhosphate® lithium-ion cell chemistry
Protection
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)
Weight
51.7 lbs
Dimensions
10.9” L x 10.5” W x 10.1” H
Configuration
8S19P; 8 series cells x 19 parallel modules
Maintenance
2-year maintenance interval; offers 50 – 90% savings on maintenance costs
Battery Life Expectancy
8 years (average)
Case
Powder-coated steel, blue
Certification
FAA TSO certified to C179a
ETSO certified to C179a
RTCA DO-311 qualified
RTCA DO-160G qualified
UNDOT/IATA qualified
Weight | 0.1 lbs |
---|---|
Dimensions | 0.1 × 0.1 × 0.1 in |
Brand |
Mid-Continent Instruments and Avionics |

SHIPPING INFORMATION
We can ship by UPS, or USPS and DHL Express. We ship nationally, and internationally.
Carriers In Use

SHIPPING COSTS
- International Shipping Quote has to be done manually due to dimensions, weight, end destination, and more. Please E-Mail us.
- Any manner or method is available, call if you need Priority 1-2 day or overnight shipping.
- We are shipping with UPS or USPS and DHL Express