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Part# 11-01657
MFR Model# G242


The Gill Electric Company was founded by Mr. Lawrence Gill in 1920, in Redlands, California, where the factory remains today. At that time, Gill Electric manufactured lead-acid batteries for the automotive industry. During the war years, Gill manufactured batteries for military ground vehicles and aircraft; some of these batteries are still in production today. Gill Electric improved the drycharged process which provides a fresh charged product when the electrolyte is added. Gill has become the OEM "original equipment battery" for Raytheon, Cessna, LearJet, Mooney, Piper, Ayres, Airtractor, Maule, Scheizer and others in the aviation industry and Gill continues to be the industry's choice for quality battery products.
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Application Guide

Cessna models: 152, 172, 177, 182, 207, 210, 336, 337 Piper models: PA-23, PA-31, PA-36

Note: The data listed in this chart is intended as a suggested reference guide only. Some installations may vary and require airframe or battery box modification. Installations not shown on D.O.T. FAA/PMA listings will require field approval using FAA form 337 or FAA approved STC.

Warranty Info

Warranty Information


  • Rate (Amps): 1 hr (C1) 8, 30 min (2C) 13, 60 sec/0 deg F (CCA) 106
    Model Weight Part No.

    24 Volt
    With Acid

    27 Lbs. (full)
    Electrolyte (3 Qts.)

    24 Volt

    W/O Acid

    27 Lbs. (full)
    Electrolyte (3 Qts.)


Last gill 242 died after 14 months in service in my C210. Only $609.00 dollars and two months to replace it. Would get better service with two 12 volt lawnmower batteries.

Phil P Verified Purchase


May 23, 2022

Fast shipping! Excellent OEM battery for the Bo.

Keith B Verified Purchase


July 27, 2021


March 17, 2021

Great, speedy service. Arrived safe and sound. I always trust Aircraft Spruce.

Victor K
January 25, 2021

Good service. Fast delivery. No issues

Greg D
January 11, 2021

This is the battery I needed and it was the best price I could find. No hassle whatsoever ordering or receiving it. Enough of this review writing, Im going flying.

Michael H
November 9, 2020

The perfect part for my aircraft

Robert B
July 22, 2020

Reliable !

Alfredo O
June 24, 2020

I have had my Mooney 252TSE for 13 years and have gone through only 2 batteries (G-242) in that time. After 13 years I am now buying a third one. The previous one I bought and installed 4/2012. That’s 6 1/2 years of regular usage. In the past year I haven’t flown much and had to charge it a couple of times before a flight but overall I’m happy with the performance. I wish they weren’t so expensive though. Kind of crazy beings a car battery is 1/5 the cost.

Jon Y
November 18, 2018

In our 185 and lasted 6 or 7 years. Not happy about the huge pricetag, but other companies charge the same

Williams C
July 22, 2018


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 the model with acid come with the acid already poured or on the side?

The model with acid will come with a dry battery (11-01675) and 3 qts of acid (11-00305) on the side.

Q: What is the capacity (A/H) for Gill G-242 battery?

Per the supplier: 10 amp/hour.

Q: What are the combined voltages for the cells?

24V 10 AMP.

Q: Are the Gill batteries with acid included shippable by air?

Yes, but only 1 qt per box and it is expensive.

Q: Are there any Battery Tenders that are safe with this battery?

Our part number 11-14350 is the recommended charger.

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