Mine got sucked out of juice after 4 years/73k miles, not a lot of towing.

 

about 2 years per set. I sure wished I had changed them out this summer when I could hear just a bit of dragging when starting.

I think a bad battery has caused my recent problems with cool weather starting, maybe stressing the throttle position sensor(sp) & now the grid heater relays.

 

5 years, 75k miles on my '04 2500 QC Cummins/Auto. Starts like it did on day one.

 

The batteries on my '06 were both dead by 60k.

 

Not bad! I left the radio on for like 8 hours straight one day and that's how they died. So no listening to music no more.

 

05, 178,000 mile and i plow, still origonal batts!

 

2006 50k miles just checked the batters both still have 1400 cranking amps each i think im good

 

What batteries do you all use, that work the best for u?

 

I had 175k on my 06. I do have a after market stereo in it. I have a 15 inch sub as well. I also run a pair of light force lights and hella fogs. I swear by my Light Forces best lights out there. I put in optima batteries a bite expensive but well worth it.

 

I replaced the OEM's 750CCA/1000A with 2 Bosch 850CCA/1000A for 99 each.