EarthX Lithium Battery Certified Aircraft 24V/7.8 AH Case E Backup Battery ETX400-24-TSO

The EarthX ETX400-24-TSO is a 26.4 V lithium iron phosphate (LiFePO4) aircraft battery designed by the manufacturer as a deep-cycle backup power source for avionics-critical electrical loads. It is supplied in Case E format and is identified by manufacturer part number ETX400-24-TSO.

EarthX lists this TSO-version battery as meeting FAA TSO-C179b. For aircraft installation, consult the applicable approved installation data, Instructions for Continued Airworthiness and the aircraft documentation.

• Nominal voltage: 26.4 V
• Capacity: 7.8 Ah at 1C rate
• Peak power: 400 A at 23 °C; 290 A at -18 °C
• Maximum continuous discharge: 40 A
• Case size: E
• Dimensions: 166 × 76 × 168 mm (L × W × H)
• Weight: approximately 2.45 kg

The integrated battery management system provides manufacturer-described protection against over-discharge, over-charge, short circuit and temperature conditions, with cell balancing. The ETX400-24-TSO also incorporates redundant electronic circuits and a battery fault-indication output for connection to a compatible indicator or EFIS, in accordance with the EarthX documentation.

Manufacturer documentation available for this model includes the ETX400-24-TSO Product Manual, Customer Installation and Instructions for Continued Airworthiness manual, and Top Level Assembly drawing.