Just helped a Jag Club friend with dead (0.0 v!) battery (XJS) so went looking for new battery, a Group 48. WalMart and AutoZone said n.a., so checked with Firestone; $120 for Interstate for Group 48 OR Group 49!
My @207 XK uses a group 49, both have vents..................
That's a very good price!
My friend has 7 or 8 Jags in his two garages including a XKF (V6); and said I get to drive it when it stops raining, Yepee.

Pray for the sun to shine.................

Cheers, Adrian