7641-20 - Gill LT Series Non Spillable Sealed Acid 24 Volt Aircraft Battery

7641-20 – Gill LT Series Non-Spillable Sealed Acid 24 Volt Aircraft Battery

Available now on the Airparts.aero Marketplace.

Overview

The Gill 7641-20 is a premium, maintenance-free, sealed aircraft battery from the high-performance "LT" (Longer Life) series by Teledyne Battery Products. This 24-volt battery utilizes advanced Valve-Regulated Lead-Acid (VRLA) and Absorbed Glass Mat (AGM) technology to deliver superior starting power and reliability for demanding turboprop and light jet aircraft. As a non-spillable battery, it can be mounted in any orientation and eliminates the hazards and maintenance requirements of traditional flooded-cell batteries. The 7641-20 is engineered to provide exceptional performance, a longer service life, and the highest level of safety for a wide range of aircraft, most notably the Beechcraft King Air family.

Key Features

• VRLA / AGM Technology: Employs an advanced Valve-Regulated Lead-Acid design with Absorbent Glass Mat separators. This technology immobilizes the electrolyte, making the battery completely non-spillable and eliminating the need for periodic watering and electrolyte level checks.
• Superior Cranking Power: The AGM design features very low internal resistance, allowing the battery to deliver significantly higher amperage during engine starts compared to flooded batteries of the same size. This results in faster, cooler starts for high-compression turbine engines.
• Maintenance-Free Operation: The battery's sealed construction and internal gas recombination cycle mean it is truly a "fit and forget" component, requiring no servicing of electrolyte levels throughout its entire life.
• Flexible Mounting & Increased Safety: Being fully sealed and non-spillable, the battery can be mounted in any orientation. This design also prevents the leakage of corrosive sulfuric acid onto the airframe.
• FAA-PMA / TSO Certified: Fully certified under FAA-PMA and approved to TSO-C173a standards, ensuring it meets the highest levels of safety, performance, and quality for installation in certified aircraft.

Technical Specifications

• Part Number: 7641-20
• Component Type: Sealed VRLA / AGM Aircraft Battery
• Nominal Voltage: 24 Volts
• Capacity (1-hour rate): 17 Amp-Hours
• Cold Cranking Amps (CCA): Approximately 200 Amps
• Weight: 29.5 lbs (13.4 kg)
• Dimensions (L x W x H): 10.25" x 9.88" x 7.38"
• Terminal Type: Threaded Post
• OEM Replacement for: Direct, high-performance replacement for older Gill G-641 flooded batteries.

Aircraft Compatibility

The Gill 7641-20 is the specified high-performance sealed battery for a wide range of twin-engine turboprop and light jet aircraft. It is crucial to consult the specific aircraft's Illustrated Parts Catalog (IPC) or STC documentation for final verification.

• Primary Aircraft Models:
  • Beechcraft King Air: 90, C90, E90 Series
  • Beechcraft King Air: 100, A100, B100 Series
  • Beechcraft Super King Air: 200, B200 Series
  • Mitsubishi: MU-2 Series
  • And other aircraft specifying this battery size and capacity.

Applications

The 7641-20 is the primary electrical power source for critical flight and ground operations:

• Engine Starting: Provides the high-amperage DC power required to spool up the starter-generators on turboprop engines.
• Emergency Power: In the event of a generator failure, it provides a stable source of power to essential avionics and flight instruments.
• Ground Operations: Powers the aircraft's systems on the ground for pre-flight checks and avionics programming without the need for a ground power unit (GPU).

Why Choose 7641-20?

The Gill 7641-20 LT Series battery represents a significant technological upgrade over traditional aircraft batteries. Its VRLA/AGM design provides tangible benefits in performance, safety, and maintenance. You get more reliable starts, a longer service life, and the elimination of corrosive acid spills, all of which translate to a lower total cost of ownership and greater peace of mind. For operators of high-performance aircraft like the King Air, upgrading to the Gill LT sealed battery is a smart investment in reliability and safety.

Order Your Gill 7641-20 Battery Now

Upgrade your aircraft's power source to a modern, reliable, and maintenance-free solution. Visit Airparts.aero to order your Gill 7641-20 LT Series sealed battery today.

The technology within the Gill 7641-20 VRLA battery is fundamentally different from a flooded cell. The electrolyte (sulfuric acid) is not free-flowing but is absorbed and held in suspension within the porous Boron-Silicate glass mat separators that are sandwiched between the lead plates. During charging, any oxygen and hydrogen gas produced are trapped within the sealed case and forced to recombine back into water through a catalyzed reaction. This "recombinant gas" cycle is over 99% efficient, which is why the battery never needs water added and can be sealed with only a one-way safety valve for overpressure protection. This AGM construction also allows for a more tightly packed cell design, lowering internal resistance and maximizing the plate surface area, which directly translates to its higher cranking power.

Note: This is a sealed aircraft battery and requires specific charging equipment and procedures. It should be capacity checked at regular intervals in accordance with the manufacturer's instructions and the aircraft maintenance manual to ensure its continued airworthiness.