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True Blue Power Unveils Lithium-Powered S.211 at EAA AirVenture Oshkosh 2026

True Blue Power Unveils Lithium-Powered S.211 at EAA AirVenture Oshkosh 2026

July 21, 2026

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OSHKOSH, Wis. — True Blue Power, the leading manufacturer of lithium-ion aircraft batteries, today announced the successful installation and performance validation of its advanced lithium-ion engine start battery on an SIAI-Marchetti S.211 military trainer and light-attack aircraft. Now on display at EAA AirVenture Oshkosh 2026, the S.211 serves as Mid-Continent Instruments and Avionics and True Blue Power's primary flight test platform, showcasing the capabilities of the companies’ product line, including the True Blue Power Gen5 TB50 (50 amp-hour) Lithium-ion Battery.

Engineered as a true same-size replacement for standard 44 amp-hour batteries, the TB50 delivers a seamless upgrade path for Warbird owners and operators while delivering significant operational benefits. The lithium-ion battery provides faster, more reliable engine starts, superior hot- and cold-weather performance, significant weight savings, extended service life, enhanced durability, and improved long-term reliability.

True Blue Power Lithium-ion Battery Engine Start Performance Comparison Chart

Battery Fuel Introduction
(10% NH) 		Total Start Cycle Time Lowest Voltage Peak Temp
True Blue Power® Gen5 TB50 Lithium-ion Battery 4 sec. 24 sec. 19.3 V 342°C
Standard
Lead-acid Battery		 12 sec. 39 sec. 13.4 V 432°C

“I’m amazed by the performance and safety improvements on our S.211, thanks to the TB50,” said Matthew Harrah, President and Chief Test Pilot for Mid-Continent Instruments and Avionics and True Blue Power. “From dramatically improved starting performance, the 45-pound weight savings, and quick recharge to full capacity, this battery has made a real difference in our aircraft’s performance and safety.”

The successful installation and validation of the TB50 battery on the S.211 underscores True Blue Power’s focus on delivering next-generation power solutions that improve operational efficiency while reducing maintenance demands for Warbird owners and operators around the globe.

The SIAI-Marchetti S.211 military trainer and light-attack aircraft will be on display during AirVenture 2026 in the Warbird Area, and True Blue Power lithium-ion batteries will be featured in the company’s booth #2007 in Hangar B. For more information, or to inquire about a lithium-ion battery upgrade, contact Van Winter, Senior Vice President of Sales and Marketing for True Blue Power, at 316-630-0101 or visit truebluepower.com.

About Mid-Continent Instruments and Avionics

Mid-Continent Instruments and Avionics manufactures, overhauls and repairs aircraft instruments, avionics and advanced power solutions for the global aerospace industry. Mid-Continent supports general, business and commercial aviation, unmanned aerial vehicles (UAV), defense, and special missions markets. The company manufactures more than 38,000 units per year and processes more than 10,000 units in its overhaul, exchange and repair operation. The Quality Management System of the Wichita, Kansas manufacturing facility is AS9100D and ISO9001:2015 certified. For additional information, visit mcico.com.

About True Blue Power

True Blue Power specializes in the design and manufacturing of electrical power solutions for the global aerospace industry. This includes USB and wireless chargers, power conversion products, emergency battery power supplies, and advanced lithium-ion batteries. Select products feature proprietary lithium-ion battery technology, which offers stable chemistry, faster charging, consistent output, excellent cycle life and lower total cost of ownership. This translates into smaller, lighter products that are less than half the size and weight of existing battery solutions. True Blue Power supports business, commercial, defense, special mission, advanced air mobility and electric aircraft. For additional information, please visit truebluepowerusa.com.