[cheetah4570]

Looking for other experience. 2018 F-150 King Ranch with 57,000 miles is approaching four years old. After sitting for a couple days battery is reading 12.1 volts. Truck is starting perfectly and we are coming out of the winter, but does anyone think at 12.1 volts it's getting tired and should be replaced before I get stuck somewhere?

 

[STIAJW]

For sake of discussion - if it's a $200 battery, and it lasts 4 years. That's $50 per year. Replacing it a year early might cost an extra $50. On the other hand, what might it cost in terms of $$, hassle, safety, etc., should the battery fail at an inopportune time and location? Not suggesting what to do, but I know I'd rather change a battery on my terms instead of the battery's terms.

 

[PeteK]

If that’s an accurate reading, using a Fluke meter or equivalent accuracy, then that battery is close to end of life. Replace it now.

 

[cheetah4570]

Two perfect responses.