120k miles and 12 years old including about 8 New Hampshire winters. Not bad.....

What kind were they?

Interstates.....

I've had several interstate's go past 10 years. Doug

i got 5.5 years out of my origionals in my f250,i went with the auto zone duralast gold,but i just sold it,so i wont know how long they will last.

My original 2000MY F350 batteries made it 11 years or so with 6 or so of those years in Massachusetts. I went with DieHard Gold for replacements.

I bought a couple replacements from Sam's Club. They had some nice 65 Series Duracell's with 875CCA for $88 bucks.

I also bought the batteries in my boat form Sam's Club last year - a couple big Energizers for a similiarly good price. I'm impressed with the Energizer's so far - seem to be holding up good and are holding a nice charge this year as well!!

Still have orginal batteries in my 06 PS f-250. 6 1/2 yrs

Still have an original bat out of my 99 SD which was built early 98 its in my loaner - runner car and still going .

Still have the originals in my 2005 F-250, but only 58K mls.