
MARATHON – 20-CELL MOD KIT – CA-103
- FAA-PMA Second Source Kit
- 20-Cell Marathon Compatible
- Comprehensive Aviation Solutions
















FAA-PMA Approved
FAA Part 145 Facility
FAA-PMA approved 20-to-19 cell battery modification kits for aircraft P/N 4076 systems. Engineered for Marathon and SAFT nickel-cadmium batteries, these retrofit kits enable seamless upgrades to aviation battery systems. Manufactured by Ni-Cad Systems with over 50 years of expertise, featuring 24/7 AOG support and fast turnaround service for corporate, airline, and military aircraft applications.
Talk to our experts for custom solutions and tailored guidance.
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What is a 20-to-19 cell battery modification kit?
An FAA-PMA approved retrofit kit that modifies aircraft battery systems from 20-cell to 19-cell configuration, ensuring compatibility with Marathon and SAFT nickel-cadmium batteries while maintaining aviation safety standards.
Are these modification kits FAA approved?
Which battery brands are compatible with these kits?
What is the typical turnaround time for installation?
Do you provide technical support for installation?
Can these kits be used in military aircraft?
What services are included with the modification kit?
Talk to our experts for custom solutions and tailored guidance.

Reliable battery modification solutions for business jets and corporate aircraft requiring FAA-compliant upgrades.

FAA-PMA approved battery system modifications for airline fleet maintenance and operational reliability programs.

Certified modification kits for military aircraft battery systems meeting rigorous defense aviation standards.

Essential retrofit kits for MRO facilities performing battery system upgrades and regulatory compliance work.
Talk to our experts for custom solutions and tailored guidance.



Over 30 FAA-PMA approvals backed by 50+ years of aviation battery expertise. Every modification kit meets rigorous aerospace quality and safety standards for reliable aircraft operations.
Round-the-clock technical support with immediate response for Aircraft On Ground situations. Fast turnaround service with rental batteries available to minimize aircraft downtime and operational disruptions.
Team with 100+ years of combined engineering expertise in nickel-cadmium battery systems. Comprehensive solutions including modification kits, temperature sensors, and receptacles for all major battery brands.
Connect with our FAA-certified aviation battery specialists. Receive expert guidance on compatible modification kits for your aircraft battery system within 24 hours.
For immediate assistance, feel free to give us a direct call at +1 510 785 9391 You can also send us a quick email at Sandrues@aol.com
For immediate assistance, feel free to give us a direct call at +1 510 785 9391 You can also send us a quick email at Sandrues@aol.com