What's the factory rated lifespan of the BXT-65-750 battery?

Mine's almost 8 years old and still kicking, but it must be getting close to the end of its life.

 

i had 6 years on mine then i changed it just because i felt like it. hard to tell life expectancy on something like a battery there are lots of variables. but you got 8 years out of it so it prolly wont hurt to change it. i just changed mine so i wouldnt get stranded somewhere and for piece of mind.

 

The last BXT-65-650 (same battery family, less CCA) I had, and my mom had, both lasted over 10 years. My 93 Ranger had the original battery in it when I traded it in this past March. We had a very cold winter (one day was -14 F without the wind chill) and this battery still got my truck started. I would be happy with 8 years, and look at getting another Motorcraft. (Yes, I know I kept mine for over ten years, I rarely took the truck on long trips, and I wanted to see how long it would last.)

 

I just fumbled around Motorcraft's web site and found the BXT's are 100 month batteries.

 

Typically the posts about these batteries are positive. I took one out of my last truck and let it sit for a year. I put it back in and it fired right up.

 

so i supose noone has went in and got one of those bxl motorcraft tested tuffs yet to replace their bxt's. the bxl is suposed to be good for 5 years of warranty on it. and is running 59.99 and i think bxt's are about 79.99 or 89.99 i havent seen many problems with either of these model batteries.

 

I have a 2006 F-150 Lariat with a stock BXT-65-650 battery that just died.
The truck has been sitting outside during most of the summer and it's been pretty hot (the paint is also black).
The date in the battery is 12/2006 and today is 8/25/2011 so it made it almost 5 years.
The new BXT-65-650 is priced at $109.95 from the dealer with a $25 rebate available, so that knocks it down to $84.95 + tax.

My truck sits in the driveway quite a bit since I work at home, so I'm not sure why the sudden failure. Probably should have been keeping it in the garage during hot weather.

NOTE: The stock battery is NOT covered by the 100 month warranty. The dealer said it is only covered under the original 3 year 30,000 mile warranty. Only newly purchased replacement batteries are covered by the 100 month deal. Oh, and KEEP YOUR RECEIPT!!!! IT is required to get the warranty replacement at a prorated fee.

 

Sitting for extended periods is very hard on the battery. It likes to be used. It will short out quicker and it will run down as there is constant drain even when the truck is not running.

 

@Bluejay - I hear ya!

I was thinking the same thing, that the battery was not actually dead, just acid stratified or sulfation had occurred. Here's a good article about battery failure: http://batteryuniversity.com/learn/a...teries_to_fail

 

This is one thing a lot of us "Yankees" get wrong, it is heat that kills a battery quicker than cold.

The old school thought that you need to test and replace your battery before winter might have held true back in the day when placing a battery on concrete would kill it ( I know I cannot stop doing this, I still put it on a 1x6 ), and it could just be for the case of you don't want to be walking when it is 5* out, but who walks any more with mobile phones in almost every pocket..

 

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