battery voltage

["datsun_sports" <datsun_sports@hotmail.com>]

at what point does the battery level drop so that the clock stops working? I
put a meter to my battery and it is reading 3.5 volts dc. nothing is
working. car is still on one jack stand so I could not move it out of the
garage to jump it. just curious. I have the oil pressure gauge unhooked.
would that cause it?

thx,

mike