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Earthx Custom Fit Battery Box for Case E Batteries ETX680, ETX900, ETX900-VNT and ETX1200

$49.00/Each
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Part# 11-14074
MFR Model# BB-CU

Overview

This custom designed battery box will fit your battery like a glove and is super easy to install. Designed aluminum battery box for the ETX680/ETX900/ETX900-VNT/ETX1200. This battery box for “E” case EarthX Batteries was engineered to be strong enough to withstand 30 G of force. However, it only weighs .18Kg or 6.4oz. This unique design allows for simple, easy installation with the dimensions: 6.5″ L x 3.1″ W x 6.6″ H.
   
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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.
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Reviews

battery box very reasonably priced,

Larry Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

January 15, 2026

The battery box is a perfect fit on the EarthX battery. I added my own removable tab to secure the battery.

Air S Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

February 19, 2024

Great service. Always in stock for quick shipping.

Ray O Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

June 23, 2023

Great quality in an up grade to my electrical system!

Clifford S Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

April 28, 2023

Good product

Alain M Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

January 7, 2023

This battery box fit the new EXT- 900 lithium battery perfectly. It was very easy to install. I would recommend it to anyone installing a lithium battery in their plane.

Floyd L
August 10, 2020

The battery box was almost perfect. It had no back so I had to make one.

Darren B Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

January 28, 2026

A well made box but it needs a gap above the box to get the battery out. The gap needs to be at least the height of the battery - making this not suitable for my firewall application. Also took weeks and weeks to arrive due to a mix up with the shipment.

Trent S Verified Purchase

EarthX Battery Box Custom Fit for Case E Batteries

January 19, 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: Do the terminal attachments need to be changed if converting from say a Powersafe Dry Cell to an EarthX (application would be on a PA-18)

The terminal measurements on both batteries are the same, so they should not have to change the terminals.

Q: Does the battery box come clear anodized or is it raw aluminum that requires a conversion coating?

It is raw aluminum.

Q: Is this battery box STCd for certified aircraft?

No these are intended for experimental applications.

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