Bluetooth Battery Monitor

I was looking at buying a battery monitor (http://cpc.farnell.com/velleman-kit/mk189/12v-car-battery-monitor-kit/dp/HK01455?ost=battery+monitor&selectedCategoryId=) but then I came across this, a Blutooth Battery Monitor which looks good, any one used one??

No!

Never seen or used one? why would you want to monitor the battery? when it's fucked it won't start  them oxford oximisers have a lighting system that tells you when the battery's knackered and they're only £20, plus they keep the battery charged.

Mr Intruder fitted a voltage meter, he later fitted a red push button switch, which was changed again to a black push button switch, so he can always see how hi battery voltage is doing
Here is the original thread he posted, sadly he hasn't updated it but I am sure you will get the idea and it cost next to sod all to do
(- LINKY -)