It's easy to find Internet 'articles' that just copy-paste each other.
EFB battery tech is far more common in Europe.
Here are some additional links:
https://www.midtronics.com/blog/everything-you-need-to-know-about-efb/
https://www.sciencedirect.com/topics/engineering/enhanced-flooded-battery
https://www.yuasa.co.uk/info/technical/agm-efb-explained/
https://www.briskoda.net/forums/topic/489933-anyone-know-what-battery-voltage-efb-there-should-be/
It does look that regardless of how they are advertised the quality may vary be it regular flooded, AGM or EFB.
Seems like with AGM one has to be especially careful and pay attention to the marketing noise to signal ratio.
I put AGM in all vehicles my wife drives for safety reasons alone - to avoid acid spill in case of a collision.
EFB battery tech is far more common in Europe.
Here are some additional links:
https://www.midtronics.com/blog/everything-you-need-to-know-about-efb/
https://www.sciencedirect.com/topics/engineering/enhanced-flooded-battery
https://www.yuasa.co.uk/info/technical/agm-efb-explained/
https://www.briskoda.net/forums/topic/489933-anyone-know-what-battery-voltage-efb-there-should-be/
It does look that regardless of how they are advertised the quality may vary be it regular flooded, AGM or EFB.
Seems like with AGM one has to be especially careful and pay attention to the marketing noise to signal ratio.
I put AGM in all vehicles my wife drives for safety reasons alone - to avoid acid spill in case of a collision.
