Acceptable voltage loss from battery-car sits idle for 3-4 days

[commodoredave]

vt II v6 no turbo or scharge

tested battery with multi meter on Friday morning first thing ( had been driven previous night)
showed 12.69 volts. Tested again on Sunday afternoon after sitting idle since Thursday and voltage had dropped to 12.52 volts.
Treating as no big deal but what is considered as a reasonable loss of voltage over that time frame ( 70 hours since last driven and circa 60 hours since last tested?)
0 loss, some voltage loss, ??????
parasitic draw issues aside is this relatively minor loss of voltage just natural seepage?

 

[grey_hawk]

I get the same...I've put it down to the security system/ecu.

 

[RWD4ever]

If you are worrying about tenths of a volt, you need to take measurements at the same temperature, i.e. not early morning vs afternoon.