Many have smartly made the move to add a Tire Pressure Monitor System to their RV. While TPMS will not eliminate 100% of the possibilities of having tire failure they can eliminate many "Blowouts" as they can provide warning of air loss. Many times giving the driver an opportunity to pull over in a safe location and to avoid destroying an otherwise potentially repairable tire.
One issue with TPMS is battery replacement and battery life. As we all know from personal experience it is almost impossible to accurately predict when a battery will "die". While we might not be able to predict the "when", there are steps that can be taken with external sensors to extend the life of the batteries and possibly prevent having a battery fail and leak and damage the sensor.
When I was shopping for an External Sensor TPMS to buy, I selected TireTraker. I used the selection criteria I outlined in THIS post.
The user replaceable
Now I am not a full timer so my RV is parked for weeks at a time and for months over the Winter here in Ohio. Now while the "Standby" mode of the sensor only draws 500nA so the "life" is not draining out very fast but there is still the potential for the battery to fail and corrosive chemicals to leak out and damaging the sensor. Remember your battery drain rate may be different.
Here is a suggestion.
Get one of those pill boxes and place a battery from your sensor in each section. I have six sensors so I have space for a new sensor battery as a back-up to the others.
Next label each sensor with the position it is associated with. This will eliminate the need to re-calibrate the sensors when you place them back on your RV.
This storage approach prevents the metal batteries from shorting out against each other too.
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