Tyre pressure monitor.

[PRD]

Not worth the hassle!

[O.C.]

Was out on a bimble with The Wolf and he had a rear puncture as we approached our watering hole.  Called AA and then ordered lunch.

Saves time life and piles 

good point Charlie,  the last time I suffered a puncture with a PR3 (dont tell 100MA    ) the TPS warned me and enabled me to get home stopping at several filling stations on the way home    

[GTRpilot]

I was working on a cycle event with the NEG in Surrey. Just ahead of the race on a fast downhill through some woods with a tight right hander at the bottom, I was doing about 80 mph when my dashboard lit up as I had a rear wheel puncture.  I managed to pull to the side whilst on the straight and let the race go past and have it plugged by the AA guys at the rear of the convoy. I am still convinced that without the monitor I wouldn't have noticed until I tipped into the tight bend at the bottom of the hill and probably been spat into the trees at 40mph. I would never be without monitors again as I believe they saved my life; well worth a battery surely :-)

Absolutely agree, the soldering bit is what I don't understand to change a battery 

[virginiajim]

The battery was never meant to be changed.  It's a 'sealed' unit and there aren't any 'serviceable' parts in the sensor.  However, it can be and has been done.  I know of at least one person that finagled the battery to be held in place without soldering.   Not sure how he worked that, though.  Soldering isn't that hard but be careful if you are a teenager and soldering in your bedroom with the window open and the curtains blowing....   The curtains can catch on fire.  Don't ask me how I know this.

[GTRpilot]

The battery was never meant to be changed.  It's a 'sealed' unit and there aren't any 'serviceable' parts in the sensor.  However, it can be and has been done.  I know of at least one person that finagled the battery to be held in place without soldering.   Not sure how he worked that, though.  Soldering isn't that hard but be careful if you are a teenager and soldering in your bedroom with the window open and the curtains blowing....   The curtains can catch on fire.  Don't ask me how I know this.