Did a bit of Googling, and it seems car/truck TPMS batteries have an expected life of 10 years or 100,000 miles. Lots of variables, though...duty cycles, sampling rates, temperature extremes, etc. but ten years for a car/truck and only three for KAW? Wonder why that is?
Also found that a typical price for a set of four new car/truck TPMS, with new batteries, was $150, not including installation.