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Earthx Etx900-vnt Lithium Battery 12v/ 15.6 Ah Case E - Experimental Aircraft Only

$549.00/Each
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Part# 11-16211
MFR Model# ETX900-VNT

Overview

Note: Not FAA Approved. Intended for use in EXPERIMENTAL AIRCRAFT ONLY.

This lithium aircraft battery is based on the ETX900 design. It has the same cranking, capacity and electronic protections (BMS) but also has the addition of built in thermal runaway containment and venting for in cabin installation.
It can be used in an aircraft that has an alternator/generator with 80 amps output or less and smaller than 550ci. In addition, the ETX900-VNT meets all of the DO-311a lithium battery use in aircraft testing requirements. This is not a TSO or PMA part number.
Also, this aircraft battery comes with an LED battery fault light indicator on the battery itself. It can be programed into your EFIS or wired to your control panel of your aircraft with a simple 12V LED light that alerts you to the state of charge and state of health of the battery (Please see manual for details). Additionally, the ETX-Series battery management system (BMS) protects the cells from over discharge, over charge, short circuit, heat (excessive cranking), and have built in cell balancing technology. Plus these protections are redundant for another layer of protection.
   
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Benefits

  • With EarthX, you gain the quality and performance you want from your lithium batteries. Our experienced team commits to innovation and industry best practices to deliver batteries you can trust. We only source high-quality materials for our batteries, and we support every product with attentive customer service. The aircraft specific batteries are the ETX Hundred series, do not use the power sport batteries as they do not have all the same safety features as the aircraft specific ones.
  • As a veteran-owned, U.S.-based company, we’re proud to provide the batteries you require for your experimental aircraft.

  • Advantages Of Utilizing EarthX Batteries For Experimental Aircraft
  • EarthX lithium batteries offer many benefits for experimental aircraft, including:
  • Lightweight materials: Our lithium batteries use cutting edge technology that lead to a much lighter battery and more powerful batteries as compared to lead acid counterparts. There’s about an 80% weight savings over a comparable lead acid battery for instant weight savings.
    For Example: the PC680 weighs 15 pounds and has 170CCA. The EarthX ETX680 weighs 4 pounds and has 320CCA. Lighter weight makes installation easier and improves the handling of your aircraft.
  • Increased cranking power: EarthX Batteries do not experience the large voltage drops as lead acid batteries experience to provide you a consistent and powerful startup every time you use your aircraft.
  • Safe performance: EarthX Batteries feature a state-of-the-art Battery Management System (BMS) that monitors performance and prevents overcharging and over discharging. The BMS is key to the longevity of our batteries.
  • Long-lasting: With the help of the BMS, our lithium batteries can last up to six years, even with heavy use in your experimental aircraft.

  • Our Commitment To Powering Aviation
  • Innovation drives us, and we continue to develop our batteries for use in the aviation industry. We are the first and only company in the world to have a 12V FAA TSO approved lithium battery for aviation use, and this is only the beginning. Our engineers have more TSO approved models in the works to make a significant impact on this industry. We currently also have a 24V FAA TSO battery offering.
  • Lead acid batteries have been at the forefront of aircraft power for decades, but we want to see change. Our developments in lithium iron phosphate batteries offer greater power, performance and safety for aircraft of all types. Be prepared to see new aircraft on the market that come with EarthX Batteries straight from the manufacturer.
  • We have goals in the aviation industry to make changes for the betterment of all, and we’re offering our support wherever we can with a Veteran owned and operated company in the USA.

Specifications

  • SKU: ETX900-VNT
  • Voltage: 13.2
  • Weight: 5.4lbs (2.4kg)
  • Cold Cranking Amps (CCA): 400
  • Peak Cranking Amps (PCA): 840
  • Amp Hour (1C Rate): 15.6
  • Chemistry: Lithium Iron Phosphate (LiFePO4)
  • Case Size: E
  • Dimensions: 6.5" L x 3" W x 6.6" H (166mm L x 76mm W x 168mm H)

  • Voltage13.2V
    Capacity16Ah @ I C Rate (See charts Below)
    Capacity vs Temperature25°C= 100%
    0°C= 92%
    -30°C= 80%
    Self-Discharge Rate<3% / month @ 25°C
    Pulse Crank Amps (PCA)840A (3 sec @ 25°C, voltage >9V
    Cold Crank Amps (CCA)400A (modified SAE test, 3 sec @ 0°F, volts > 7.2V)
    Continuous Discharge Amps150A
    Standard Charge Voltage13.9 - 14.6V
    Maximum Charge Voltage15V
    Recommended Charge Voltage5 - 20A
    Max Charge Amps80A (from vehicle charging system)
    Life (Charge cycles, 80% depth of discharge)4000 cycles @ 1°C discharge rate,
    25°C 2000 cycles @ 10°C discharge rate, 25°C
    Life (Years)8 Years
    Weight5.4 lb. (1.8kg)
    Dimensions6.5 in (L) x 3.1 in (W) x 6.6 in (H)
    166mm (L) x 79mm (W) x 168mm (H)
    Environmental Rating (resistance to water intrusion)IP 66 (wash down with a high pressure washer)
    Operating Temperature-30°C to +60°C
    Storage Temperature-40°C to +70°C

In The Box

  • 1 x ETX900-VNT
  • 2 x 6mm screws
  • 2 x elbows for tubing
  • 2 x 4″ foam
  • Tubing & LED fault light sold separately.
  • Accessories
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Reviews

Order made it to me in a prompt manner.

Larry Verified Purchase

EarthX Lithium Battery Experimental Aircraft 12V/15.6 AH Case E ETX900-VNT

January 15, 2026

Q&A

Please note, Aircraft Spruce ®'s personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce ® assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this include the vent kit?

No the vent kit is not included.

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