Small 15 Min Mod today as I use A CTECK trickle Charger I needed to see if it was keeping the battery In tip Top Condition so I fitted a volt meter on a push switch as not to drain the battery when not hooked up to the Charger, so it give Volts in at around 14.9v on connection then dropping down to 14.2v then trickle at 14.v.
When disconnected the battery which is in tip top reads anywhere from 12.7v to 13.5 volts mine sits on 13.5 for around 24 hours and drops to around 13.2volts for the rest of the week happy with that.
Also when disconnected from the CTECK and Engine Running it will give you Alternator Inputs so it has a few functions that could be Useful when doing any fault finding at the touch of a button. http://s1174.photobucket.com/user/exiledviking1/slideshow/CTECK%20Battery%20MOD
<---- Click on this for a Little slide show pictures in no particular order
Thanks for taking the time to look and the cost £4.50 bits off Ebay/amazon