Quick Answer
The Breitling Avenger II GMT Stainless Steel / Stratus Silver / Rubber / Folding A3239011/G778/157S/A20D.2 is a quartz timepiece powered by a Needs Review battery. Under normal operational conditions, this cell provides approximately 2 to 3 years of continuous power before needing replacement.
How to Replace the Battery in a Breitling Avenger II GMT Stainless Steel / Stratus Silver / Rubber / Folding A3239011/G778/157S/A20D.2
Replacing the battery in your Breitling (standard size, Stainless Steel) requires carefully inspecting the case back. Most quartz dress and sport models utilize either a snap-on back or a multi-notched screw-down case. Using an appropriate watchmaker case wrench or pry knife prevents slipping and scratching the Stainless Steel finish. Avoid touching the new battery surfaces directly with your fingers, as skin oils can reduce conductivity.
Disclaimer: The video above is for example and general guidelines only. It may not be entirely specific to your exact model, and quality/accuracy depends on third-party availability. If in doubt, please refer to your specific watch handbook or consult a professional.
Required Power Source
This watch requires a standard battery. Grab a replacement below.
Watch Specifications
| Brand | Breitling |
| Model Info | Stainless Steel • Silver dial |
| Movement / Power | quartz |
| Battery Code | Needs Review |
Frequently Asked Questions
What battery size does the Breitling Avenger II GMT Stainless Steel / Stratus Silver / Rubber / Folding A3239011/G778/157S/A20D.2 use?
This timepiece operates on a Needs Review battery cell.
How long does the battery last in a Breitling Avenger II GMT Stainless Steel / Stratus Silver / Rubber / Folding A3239011/G778/157S/A20D.2?
A quality replacement cell typically lasts between 24 and 36 months.
Can I change the battery myself?
Yes. With a basic case opener and non-magnetic tweezers, replacing the battery takes under 10 minutes.