Battery-free TPMS
The latest vehicles use a TPMS system without any little batteries in the sensors - it relies on the centrifugal action for energy. Do any of the aftermarket TPMS systems for trailers use this tech...
Forum Discussion
Some of the no-battery TPMS systems don't use an in-wheel sensor at all. Called "indirect" TPMS systems, they rely on software and the wheel speed sensors to detect a low-inflation tire. If all tires were equally low, an alert would not be detected. With such a system you can for instance freely swap summer and winter wheels. No sensors to deal with, no system re-programming, etc.
