MARATHON – 20-CELL MOD KIT – CA-103
MARATHON – MOD KIT – MA-5
FAA-PMA Modification Kits
FAA-PMA Approved certified

FAA-PMA Approved

Part 145 FAA Certified certified

Part 145 FAA Certified

20-to-19 Cell Battery Modification Kit for Marathon SP-400

FAA-PMA approved 20-to-19 cell battery modification kits for Marathon SP-400 nickel-cadmium aircraft batteries. Manufactured by Ni-Cad Systems with over 50 years of aviation battery expertise, these second-source modification kits ensure reliable battery system upgrades for corporate, airline, and military aircraft applications with full regulatory compliance and 24/7 technical support.

Our Range of Products
MARATHON – 20-CELL MOD KIT – CA-103

MARATHON – 20-CELL MOD KIT – CA-103

  • FAA-PMA Approved Second Source
  • Marathon NiCad Compatible
  • 24/7 AOG Support Available
MARATHON – MOD KIT – MA-5

MARATHON – MOD KIT – MA-5

  • FAA-PMA Certified Solution
  • Marathon Battery Compatible
  • DER Support Available
FAA-PMA Modification Kits

FAA-PMA Modification Kits

  • FAA-PMA Approved Kits
  • Part 145 Facility
  • Rental Batteries Available

Frequently Asked Questions

What is a 20-to-19 cell battery modification kit?

It's an FAA-PMA approved kit that modifies Marathon SP-400 nickel-cadmium aircraft batteries from 20-cell to 19-cell configuration for specific aircraft applications.

Are these modification kits FAA approved?

Which aircraft use Marathon SP-400 battery modification kits?

What technical support is available for these kits?

How long does the modification process take?

Can these kits replace OEM Marathon products?

What is included in the modification kit?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Corporate Aviation

Corporate Aviation

Critical battery modification solutions for corporate jets requiring reliable Marathon SP-400 upgrades.

Commercial Airlines

Commercial Airlines

Fleet-scale battery modification kits ensuring compliance and reliability for airline operations.

Military Aviation

Military Aviation

Ruggedized modification solutions meeting stringent military aircraft battery system requirements.

Aviation MRO

Aviation MRO

Trusted modification kits for maintenance, repair, and overhaul facilities servicing diverse aircraft.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

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MARATHON – 20-CELL MOD KIT – CA-103 | 20-to-19 Cell Battery Modification Kit for SP-400

20-to-19 Cell Battery Modification Kit for SP-400

FAA-PMA approved 20-to-19 cell battery modification kits designed for SP-400 Marathon and SAFT nickel-cadmium aircraft batteries. Manufactured by Ni-Cad Systems with over 100 years of combined engineering expertise, these second-source modification kits enable reliable aircraft battery system upgrades. Backed by 24/7 AOG technical support and fast turnaround service for corporate, airline, and military aviation applications.
SAFT MOD KIT CA154-1 | 20-to-19 Cell Battery Modification Kit for SAFT 4076

20-to-19 Cell Battery Modification Kit for SAFT 4076

FAA-PMA approved 20-to-19 cell battery modification kits for SAFT 4076 systems. Precision-engineered solutions for aircraft battery system modifications, manufactured by Ni-Cad Systems with over 47 years of aviation expertise. Compatible with SAFT and Marathon nickel-cadmium batteries, these modification kits provide second-source alternatives for corporate, airline, and military aviation applications with 24/7 AOG technical support.
MARATHON – ELECTRONIC BATTERY – 9913-1 | Marathon Batteries

Marathon Batteries

Marathon battery products, including FAA-PMA approved replacement battery packs, low-impedance receptacles, and modification kits for aviation applications. Designed for corporate, airline, and military aircraft with nickel cadmium technology. Backed by over 47 years of aircraft battery servicing expertise and 24/7 technical support.

Why Aviation Professionals Choose Ni-Cad Systems, Inc.

FAA-PMA Approved Reliability

All modification kits are FAA-PMA certified with 30+ approvals, ensuring full regulatory compliance and superior quality for aircraft battery systems.

50+ Years of Aviation Expertise

Over 47,000 units serviced since 1974, backed by 100+ years of combined engineering experience. Trusted by corporate, airline, and military operators worldwide.

24/7 AOG Technical Support

Round-the-clock emergency support with fast turnaround times and rental batteries available. Get immediate assistance when you need it most at +1 510 501-9391.

Get Expert Guidance on Your Battery Modification Needs

Our aviation battery specialists will respond within 24 hours to discuss your specific requirements and provide detailed technical specifications.

Contact Us Today

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