True Blue Power Tested Gen5 Battery Performance

The lithium-ion unit powered a SIAI-Marchetti S.211 jet trainer during a demonstration presented in August 2026.

Updated on Sept. 24, 2026 in Electric Vehicles

True Blue Power Tested Gen5 Battery Performance

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Is upgrading to newer battery technology a good way to improve your aircraft's safety and reliability?

True Blue Power showcased the capabilities of its Gen5 TB50 lithium-ion battery in August 2026 at EAA AirVenture in Oshkosh, Wisconsin. The unit was installed in a SIAI-Marchetti S.211 jet trainer to demonstrate improved starting performance and reduced engine wear.

Why it matters

The technology aims to extend the lifespan of aircraft components by reducing thermal stress on starter-generators and engine burners. It also enhances safety margins by providing more consistent voltage during critical startup phases.

The Gen5 TB50 weighs 45 pounds less than lead-acid counterparts and supports up to 10,000 charge cycles. It maintains over 20 volts during starts, compared to 13 volts for lead-acid, and reaches a 90 percent charge within five minutes.

The players

True Blue Power

This division of Mid-Continent Instruments and Avionics specializes in the design and manufacture of advanced electrical power solutions for aircraft.

Doc

This famous B-29 Superfortress is one of two remaining airworthy examples of the heavy bomber in the world.

The details

The battery management system prevents constant power draw when idle, while built-in heaters enable operation in cold environments. The unit also features a digital data bus for monitoring health and state of charge, and it remains operational even at a 30 percent charge level.

The SIAI-Marchetti S.211 trainer aircraft originated production in the 1980s.
Mid-Continent Instruments and Avionics presented the battery at EAA AirVenture in August 2026.

Roadmap

The aviation industry is increasingly pivoting toward lithium-ion solutions to replace legacy lead-acid systems that have been standard for decades. This shift reflects a broader drive to reduce aircraft weight while improving reliability across the civilian aviation market.

Aircraft operators can expect reduced maintenance costs on starter-generators and engine sections due to the cooler starting temperatures. The integrated heating and monitoring systems also simplify cold-weather operations and battery health management for pilots.

The takeaway

The transition to advanced lithium-ion batteries offers significant weight savings and operational efficiencies for legacy aircraft models. Pilots should consider the long-term cost benefits of these systems regarding engine wear and reliability compared to traditional batteries.