My K12GT has tyre pressure monitors in the wheels, they're not a cheap item to replace and it's always concerned me about the battery life on them.
Turns out they just use the common C2032 button cell batteries and with a little effort can be changed out.
http://www.youtube.com/watch?v=Mpjz0cDjnK4
TPM batteries
Moderators: slparry, Gromit, Paul
TPM batteries
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Steve Parry
Current fleet: '14 F800GS, '87 R80RS, '03 R1100S BoxerCup, '15 R1200RT LE Dynamic, '90 K1, '05 K1200S
Steve Parry
Current fleet: '14 F800GS, '87 R80RS, '03 R1100S BoxerCup, '15 R1200RT LE Dynamic, '90 K1, '05 K1200S