I will have had my truck 1 year next month (was bought new). The battery was dead this past weekend. I charged it at 10A for about 7 hours, then drove it for about 45 mins. I checked this evening after I got home from work, and the voltage is down to 12.3V already. I checked for off draw after charging it Sunday, and found 23MA, which should be okay. I can find nothing about the battery in the warranty guide. What kind of warranty does a new vehicle battery have? What kind of aggravation will it be if I take it to a dealer? I'm tempted to just get a new battery, and install it myself. I can get an Interstate through where I work. The alternator must be okay, was showing 14.7V with the engine running. I have the battery cable off now, to see if it drops more voltage by tomorrow evening. If it does, I'll know the battery is bad. I just wondered how much hassle trying to get warranty on a battery is. It is a burden for me to have to take to a dealer, and I worry about it quitting on the road.

Just wanted some advice, thanks!

 

Batteries are wear & tear items. Many don't realize that there new car/truck could have been jumped/moved/jumped/moved several times if it's been on a lot for 6 plus months before selling. While you can go to the dealer, it's often easiest just to suck up the cost of the wear & tear item. Just my .02 worth....

 

It may be covered by dealer.

 

Batteries are wear and tear but they still have warranties. Yours should have a two or three year full replacement factory warranty. I'd atleast call the dealer before I just "sucked it up".

 

Less than a year old - should be covered under warranty.

 

Yeah I think the battery is 12 month 12,000 mile replacement. Probably sat on the lot a while and got a bad cell. Have heard of it happening, very common with all the BMS bull crap and Auto S/S now a days. Exactly why I disabled BMS which disabled AS/S for me...

 

What exactly does disabling BMS do, and how do you disable it? Will disabling BMS cause other problems?

 

It allows the truck to charge the computer when it is running, like it has for decades. Currently it's determined when and how much to charge with a different strategy.

I think you disconnect the battery connection at the firewall, something as simple as thing...but maybe I'm missing a key component. No side-effects.

 

I've never gotten less than ( 5 ) years out of an OEM battery, ( 7 ) out of two of them using a trickle charger.
A one year old battery sounds defective, you have nothing to loose by going to your dealership..
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Disabling BMS (Battery Management System) causes the truck to use a conventional charging strategy like they have for decades. BMS is a new high tech way to keep the battery at "Optimum Levels" which in my opinion if driven short distances or infrequently can cause battery fatigue and other issues..