ETX680-24-TSO (FAA Approved for GA Aircraft)


STC or Part 337 (field approval) is required for installation. If you need the 8130-3 form for international orders, it is an additional $150 fee per battery and must be requested prior to shipping.


SKU: ETX680-24-TSO
Voltage: 26.4
Weight: 7.2lbs (3.2Kg)
Cold Cranking Amps (CCA): 400
Peak Cranking Amps (PCA): 850
Amp Hour (1C Rate): 11.7
Chemistry: Lithium Iron Phosphate (LiFePO4)
Case Size: U
Dimensions: 6.5" L x 5.1" W x 6.6" H
                    (166mm L x 129mm W x 168mm H)

Please note:
  • If you live outside the USA or Canada, email us at for a shipping quote.
  • Due to shipping regulations, this battery does ship as dangerous goods outside of the 48 continental USA states. Please email for a quote.


The FAA approved 24V ETX680-24-TSO designed for certified aircraft! We do not have any STC’s yet so you will have to attain your own field approval to install it.

This battery can be used in an aircraft that has an alternator/generator with 70 amps output or less.  This battery has electronic protections (BMS) and built in thermal runaway containment and venting ability built in. The ETX680-24-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, ETX-Hundred-Series aircraft batteries 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 ETX680-24-TSO
  • 2 x 8mm screws plus washers and lock washers

3/8″ Tubing sold separately 3/8″ Vent Tubing – EarthX Batteries

LED light sold separately LED fault indicator, press to test feature and dimmable! (

FAA Required Statement:

“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.”

EarthX is USA based engineering and manufacturing company dedicated to continuous improvements to bring you the best possible battery.

   Click here to download the Product Specification Sheet

   Click here to download the Installation & Maintenance Manual (IMM)

   Click here to download the Instructions for Continued Airworthiness (ICA)

   Click here to download the Top Level Assembly

   Click here to download the LED Indicator Quick Reference

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