Normal batteries 5 years max performance and completely iffy after that.

XS power batteries 10 years and completely iffy after that.

I use xs power in my diesel vehicles because of the lifespan issues.

Gassers I use deka batteries.

__________________
Just BMW's - All cars and trucks was two pages long
1994 318is
1997 528i
2000 323i
2001 X5 3.0 auto
2005 X5 3.0 auto
2011 535xi auto
2013 X5 xdrive35 Turbo
More are at my website

Aftermarket E53 Radio Install