The Teledyne Gill 7407-28 Sealed Aircraft Battery represents the next generation of extreme cranking valve-regulated lead-acid (VRLA) technology, specifically designed for helicopters. Built to withstand the rigorous demands of rotary-wing aviation, this battery is more than just an upgrade—it’s a commitment to unmatched safety, reliability, and long-lasting performance. With a sealed, non-spillable VRLA design, it delivers powerful, maintenance-free operation that aviation maintenance professionals rely on.
TSO Authorized, rigorously tested to DO-160E standards, and certified by FAA-PMA and EASA, the Teledyne 7407-28 meets the highest safety and quality benchmarks, providing dependable power for every flight. The first capacity inspection is required only after 18 months or 1,800 hours of use, reducing maintenance downtime and allowing your helicopter to spend more time in the air. Supported by a 2-year warranty, it performs consistently under even the most challenging flight conditions.
The Teledyne 7407-28 is the ideal choice for helicopter pilots who demand a reliable and enduring power source. Its advanced VRLA technology ensures a non-spillable design, enhancing safety and handling, particularly in the dynamic and often unpredictable environments of helicopter operations.
Whether you’re flying commercially, privately, or in a military capacity, the 7407-28 provides unparalleled confidence in your power source. It operates reliably across extreme temperatures, ensuring your helicopter’s systems stay powered from the coldest altitudes to the hottest and harshest terrains.
Equip your helicopter with the trusted power of the Teledyne Gill 7407-28 and experience the superior performance and reliability of advanced lead-acid technology, specifically engineered for the unique demands of helicopter flight.
Concorde Battery Cross-Reference
The Gill 7407-28 is a verified cross-reference and compatible replacement for the following Concorde aircraft battery models. If you are searching for a Concorde battery replacement, the Gill 7407-28 sealed VRLA aircraft battery is the recommended equivalent for:
- Concorde RG-380E/40
- Concorde RG-407
Concorde and Gill batteries are cross-referenced by aviation maintenance professionals, FBOs, and aircraft operators seeking a quality alternative. If you are replacing one of the Concorde models listed above, the Gill 7407-28 offers maintenance-free sealed construction, FAA-PMA certification, and the durability required for demanding aviation applications.
Need help confirming the right cross-reference for your aircraft? Our aviation battery experts are available by phone, email, or chat to verify fitment and compatibility for your specific application.
| General Information | |
|---|---|
| Part # | 7407-28 |
| Manufacturer | Teledyne Gill |
| Spec Sheet 1 | View Spec Sheet |
| MSDS 1 | View Safety Data Sheet |
| Shipping Information | |
|---|---|
| Product Weight | 66 lbs. |
| Product Dimensions | 16 x 17 x 15 in. |
| Schedule B | 8507200090 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| 30 Minute Emergency Rate, C/2, A | 45 |
| Model | 7407-28 |
| Nominal Voltage, V | 24 |
| One Hour Capacity, C1, Ah | 28 |
| Power Performance | 23°C (75°F): Ipp, A - 1599, Ipr, A - 1088, -18°C (0°F): Ipp, A - 1100, Ipr, A - 840, -30°C (-22°F): Ipp, A - 850, Ipr, A - 600 |
| Weight, Lb. Maximum | 66.50 |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Agusta | AW139 (AB139) |
| Bell | 407 |
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QUESTIONS & ANSWERS
Yes. Gill aircraft batteries do not have any “memory effect,” so interrupting the charge will not harm them. Just be sure to turn off your battery charger when pausing the process. For optimal performance, it’s best to finish charging your battery within the same day.
Gill does not recommend onboard battery charging. Always remove the battery from the aircraft before charging.
If properly serviced, your battery can provide several years of reliable service. However, Gill recommends changing your battery every two-and-a-half to three years.
On a newly charged 24V battery like the 7407-28, the voltage should read 26 to 26.4 volts.
Store the battery in a cool, dry place with a stable temperature, ideally around 80°F (27°C). Avoid areas with high humidity or extreme temperatures, as these conditions can adversely affect the battery’s health. Ensure the storage area is well-ventilated and away from flammable materials. Additionally, store the battery in an upright position to prevent any potential leakage.
Before storage, wipe the battery with a dry cloth to remove any dirt or moisture that could lead to terminal corrosion and ensure the battery is fully charged. A fully charged battery is less susceptible to sulfation, a condition that can diminish performance. Even during storage, it’s important to check the battery’s voltage periodically. If the voltage drops below 75% of its state of charge, recharge the battery to prevent deep discharge, which can shorten its lifespan.
Yes, the battery is designed to perform in low-temperature environments, with specific cold cranking performance metrics provided for temperatures as low as -30°C (-22°F).
Gill 7000 Series LT valve-regulated lead-acid batteries, including the 7407-28, can be stored for up to 24 months without an inspection if stored between 40°F and 80°F.
Gill 7000 Series LT valve-regulated lead-acid batteries are shipped fully charged and ready for installation. However, it’s advisable to verify the battery’s state of charge upon receipt to ensure optimal performance. If the battery has lost charge during transit or storage, recharging it before installation is recommended.
Gill 7000 Series LT valve-regulated lead-acid batteries are warranted for a period of 12 months or 600 hours of operation, whichever occurs first after the date of installation. Teledyne Battery Products (TBP) will replace, at no charge, any battery manufactured or supplied by it which, within the applicable 12 months or 600-hour period, is found to the satisfaction of TBP to be defective in material or workmanship.
While the battery is sealed and requires less maintenance than traditional flooded lead-acid batteries, regular inspections and capacity checks are recommended to ensure continued airworthiness.
