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Part# 11-03881
MFR Model# RG-35A


Recombinant Gas - The RG Series are low resistance, valve regulated lead acid (VRLA) batteries.

  • Superior starting power
  • Reliable essential power in the event of a generator failure
  • Low impedance design
  • Maintenance free
  • Constructed with non removable vent valves - no addition of electrolyte or water required
  • Aerobatic: Non spillable at any altitude or attitude
  • Factory tested to assure airworthiness
  • Shipped fully charged and ready to install
  • Manufactured with absorbed glass mat separators (AGM)
  • RG Series batteries ship non-HAZMAT

NOTE: This aircraft battery is not designed or intended for turbine aircraft engine starting applications. Warranty coverage applies to reciprocating aircraft engine starting, and standby / essential power installations.

*NOTE* - The STC for some aircraft is available at an additional cost please call 877-4-SPRUCE (777823) if applicable to your aircraft.

Battery Type
Ampere Hours
Max. Weight
Our P/N
Battery Diagram PDF
Sealed Lead Acid
29.5 lbs.


  • Voltage: 12v
  • Ampere Hours: 29
  • Weight: 29.5 lbs
  • Cold Cranking Amperage (CCA): 390


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In my not so humble opinion the RG series of Concorde batteries are the best available lead-acid General Aviation batteries. A great product at a fair (by aircraft standards) price. And, they are essentially maintenance free which is a blessing considering how hard it is to access many light aircraft batteries that are tucked away in obscure places.

Robert J
November 23, 2020

Should last many years

Gregory R
September 28, 2020

Very very happy with this purchase and even moreover that I ordered this on 9/14 and received it on 9/16. I was so very impressed that Aircraft Spruce is delivering Amazon service... Very...

John S
September 28, 2020

Great battery that arrived fully charged, in good condition, and very quickly with standard shipping.

Larry Z
August 24, 2020

Ordered online Friday afternoon, arrived Monday afternoon in good condition.

August 21, 2020

I installed this battery (Concorde RG-35A) in my Mooney M20C on 2/18/2012. This week (7/25/2020) I started having problems. I attribute the longevity of this battery to a great design and the BatteryMinder which was always connected. I hope I see 8+ years on my next RG-35A. Highly recommended!

Paul T
July 25, 2020

The battery that I purchased last year went bad and I replaced it with this one. I have filed a warranty claim to get reimbursed.

Max W
July 21, 2020

Cranks my IO-520 right up, even with 8 ft remote mount. Used to take three attempts to get the current flowing on my last battery. Also, fast delivery in good packaging.

Andy R
July 7, 2020

Arrived in perfect condition and was a drop-in replacement for the old battery. I hope this one also lasts almost 5 years.

June 29, 2020

The battery arrived timely, well packed and appears to be in good condition. Due to the Covid-19 pandemic I cannot leave home to install the new battery in the airplane and use it.

Daniel C
April 6, 2020


Q: Will this Concorde RG-35A sealed lead acid battery come charged and ready to install - or do I have to do the first charge charging of it?

Yes, all of our sealed aircraft batteries will ship charged and ready to install out of the box.

Q: What is the cold cranking amperage on the Concorde RG-35A battery?

The Cold Cranking Amps (CCA) is 390 on the RG-35A.

Q: Is the Concorde RG-35A a direct replacement for a Gill G-35? That is the battery I have in my 1975 Sundowner.

Yes, this is a direct replacement for the Gill G-35 battery.

Q: Is the Concorde RG-35A a direct replacement for a Gill G-35? That is the battery I have a Socata TB 10

Yes, the RG-35A is a direct replacement for the G-35. Both will have the same applications.

Q: Will this battery fit into a 1948 Beech Bonanza? Is an STC required for installation?

Yes, this is the correct replacement battery for the Beech BE35. Installation of the battery is covered under the STC.

Q: Is this the battery for my PA-32-260?

Yes, the RG-35A and RG-35AXC can be used on the Piper PA-32 PA-32-260, PA-32-300, PA-32-301, Turbo PA-32-301T, PA-32R-300, PA-32R-301, Turbo SP PA-32R-301T, PA-32RT-300, Turbo PA-32RT-300T, Seaplane PA-32S-300.

Q: Does a Concorde RG-35A a direct replacement for a Concorde CB-35A?

Yes, this is a direct replacement.

Q: Will this work on a 1968 PA-28-180? What is the difference between this and the super sealed lead acid (35AXC) ?

Yes, this fits the PA28-180. The difference is the XC model is extra cranking and provides the highest cranking power and capacity in the 35 line. It is commonly used in cold weather applications.

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