I use TST 503 model and have the optional sensors that are installed in the wheel similar to factory systems. Battery life is supposed to be 7 yrs and I'm currently just over 3 yrs. With both psi and temp info it may be possible to detect dragging brake and dry bearing issues besides just tire issues with the internal sensors. In fact, I can tell both curb side trailer tires run 6 to 10 degrees hotter due to the truck's diesel exhaust.
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Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'19 Starcraft Telluride 292RLS
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