Ultimate Aircraft Battery Cross Reference Guide

The Concorde RG-25 is commonly equivalent to the Gill G-25 and sealed VRLA models such as 7025-20. These batteries share similar voltage, dimensions, and typical general aviation applications.

However, aircraft battery replacements must always be verified against approved data. Check your aircraft maintenance manual, IPC, or applicable STC documentation to confirm compatibility, mounting configuration, and certification requirements before installation.

The Gill G-35 can typically be replaced with the Concorde RG-35A or sealed Gill models such as 7035-28. These batteries are commonly used in aircraft requiring higher cranking performance and capacity.

Before replacing, always verify fitment, terminal configuration, and approval status in your aircraft documentation. Some aircraft may require specific STC approvals or installation modifications.

In many cases, a flooded aircraft battery can be replaced with an AGM (Absorbent Glass Mat) battery, but only if the replacement is approved for your specific aircraft.

AGM batteries are sealed, maintenance-free, and offer improved vibration resistance and reliability. However, they may have different charging characteristics and installation requirements.

Always confirm compatibility using the aircraft maintenance manual, STC documentation, or guidance from a licensed mechanic before upgrading.

No. Aircraft batteries are not universally interchangeable, even if part numbers appear to cross-reference.

While cross-reference charts help identify equivalent models, installation compatibility depends on multiple factors including dimensions, terminal orientation, mounting provisions, electrical characteristics, and certification requirements.

Always verify the replacement battery against approved aircraft documentation and consult a qualified maintenance provider before installation.

AGM (Absorbent Glass Mat) batteries are sealed, maintenance-free, and ready for installation. They offer improved reliability, vibration resistance, and longer service life in many applications.

Dry-charged batteries, on the other hand, require activation with electrolyte before use and typically require periodic maintenance. They are often more cost-effective but require more handling and servicing.

The correct choice depends on your aircraft requirements, operating environment, and approved battery types.

The Cessna 172 commonly uses Group 24 or Group 25 aircraft batteries, depending on the specific model and configuration.

Typical options include Concorde RG-24, RG-25, or Gill equivalents such as G-24 or G-25. Always verify the exact battery type using the aircraft maintenance manual or IPC for your specific aircraft serial number.

The correct aircraft battery can be identified using the existing part number, aircraft maintenance manual, or IPC. Cross-reference charts can help match older or legacy battery part numbers to current equivalents.

Always confirm voltage (12V or 24V), dimensions, terminal configuration, and certification requirements before selecting a replacement battery.

Aircraft battery lifespan typically ranges from 2 to 5 years depending on battery type, usage, maintenance, and operating conditions.

AGM batteries often offer longer service life and better reliability, while dry-charged batteries may require more frequent maintenance.

Proper charging, storage, and regular inspection can significantly extend battery life.