RG380E44 - Concorde Battery RG-380E/44 24V Aircraft Battery – Valve-Regulated Lead-Acid Absorbed Glass Mat

The RG-380E/44 is a sealed valve-regulated lead-acid (VRLA) battery, meaning it’s completely sealed to prevent electrolyte spillage and requires no water servicing. The battery utilizes Concorde’s recombinant gas technology to internally recombine gases during charging, providing maintenance-free reliability and consistent performance throughout its lifespan.

According to Concorde’s specifications, the RG-380E/44 has a rated capacity of 42 amp-hours (C1) and delivers excellent cranking power across a wide range of temperatures. At 73°F (23°C), it provides a peak power rating of 1,350A, at -0.4°F (-18°C), it produces 875A, and at -22°F (-30°C), it delivers 750A, ensuring dependable starting performance even in extreme conditions.

No, the RG-380E/44 is virtually maintenance-free. Because it’s a sealed VRLA design, there’s no need to add water or perform routine electrolyte checks. However, Concorde recommends regular capacity checks and voltage monitoring as part of your aircraft’s standard maintenance program to ensure peak performance and early detection of any capacity loss.

The battery should be charged using a constant-voltage charger designed for VRLA batteries. Concorde specifies charging limits in the RG Series Owner-Operator Manual to prevent overcharging and ensure long-term reliability. Using a Concorde-approved charger helps maintain full capacity and prevents damage to internal cells.

The RG-380E/44 meets DOT and IATA transport safety standards for non-spillable batteries, making it suitable for air, sea, and ground shipping under “non-hazardous” classification. While the electrolyte is immobilized, it should still be stored upright and handled with care to prevent terminal damage or shorting during transit.

This model uses MS3509-style receptacle terminals, ensuring compatibility with standard aircraft electrical connectors. The secure design enables efficient current transfer and reliable electrical connections under varying vibration and temperature conditions.

While service life depends on usage patterns, charging methods, and operating environment, Concorde VRLA batteries typically last three to five years or longer under proper maintenance. Regular performance testing and following Concorde’s recommended charging procedures can help extend the battery’s lifespan.

The Concorde RG-380E/44 meets FAA TSO-C173 and RTCA/DO-293 standards, as well as AS9100 quality system requirements. These certifications ensure that the battery meets the rigorous performance, safety, and traceability standards required for certified aircraft installations.

Yes. In many aircraft, the RG-380E/44 serves as a drop-in replacement for other 24-volt batteries, including earlier Concorde models. However, operators should always verify compatibility with the Aircraft Maintenance Manual (AMM) or an FAA-approved battery substitution list before installation.

If storage is required, Concorde recommends keeping the battery fully charged and stored in a cool, dry environment. For storage beyond 90 days, recharge every 60 to 90 days to maintain charge and prevent sulfation. Proper storage extends battery life and ensures readiness when reinstalled.

All service information – including the Component Maintenance Manual (CMM), Owner-Operator Manual, and Safety Data Sheet (SDS) – is available directly from PJi. Our aviation specialists can also assist with battery selection, certification questions, and maintenance best practices.