STC or Part 337 (field approval) is required for installation. If you need the 8130-3 form for international orders, it is an additional fee and must be requested prior to shipping.


“The conditions and test required for TSO approval of this article are minimum performance standards. Those installing this article either on or within a specific type or class of aircraft must determine that the article installation conditions are within the TSO standards. The article may be installed only according to 14 CFR part 43 or the applicable airworthiness requirements.”


Voltage: 13.2
Weight: 5.4lbs (2.4kg)
Cold Cranking Amps (CCA): 390
Peak Cranking Amps (PCA): 800
Amp Hour (1C Rate): 15.6
Chemistry: Lithium Iron Phosphate (LiFePO4)
Case Size: E
Dimensions: 6.5" L x 3.1" W x 6.6" H
                    (166mm L x 79mm W x 168mm H)

Please note:

The FAA approved 12V ETX900-TSO designed for certified aircraft. An STC or Part 337 (field approval) is required for installation.

This battery has electronic protections (BMS) and built in thermal runaway containment and venting ability built in. The ETX900-TSO meets all of the DO-311a and DO-160 requirements for a lithium battery in aircraft.

This battery series is fully protected by an integrated battery management system (BMS) that protects the cell’s from over discharge, over charge, short circuit, temperature, plus cell balancing to ensure charge levels are equal. Additionally, EarthX’s ETX-Hundred Series have redundant electronic circuits and battery fault indication. This battery also has fault indication that can be programed into your EFIS or wired to an LED on your panel. The fault indicator alerts you to the state of charge and state of health of the battery. (Please see manual for details)

What’s included:

  • 1 x ETX900-TSO
  • 2 x 6mm screws plus washers and lock washers
  • 2 x elbows for tubing

Tubing sold separately


   Click here to download the Product Specification Sheet

   Click here to download the Product Manual

   Click here to download the Letter of Authorization

   Click here to download the STC

   Click here to download the AML

   Click here to download the ICA

   Click here to download the Top Level Assembly