9.5 battery Gen2 ?

I have just had my 9.5 battery for about 12 months.
I see there is now a 9.5 Gen2.
Any idea of the difference

I thought all 9.5 batteries are Gen2, to reflect the 100% DOD capability that the smaller batteries don’t have.

Lofthouse
Thanks.
Just that my literature does not say Gen2 and new literature now says Gen2