CMOS Polarity

[bcrown]

So I did a stupid thing and removed the cmos battery without noting the polarity and the unit allows me to put a new battery in without regard to either direction.

Can anyone tell me if the + is towards the top of the machine (screen) or the bottom (keyboard) when replacing the battery.

For some reason my clock is periodically resetting to an earlier time not caused by a windows time update. I am hoping the cmos is the problem, but I have not lost any cmos other settings.

[Thinkpad4by3]

Which machine is this for? Can you post pictures using a service such as imgur.com? In most Thinkpads, they have keyed connectors so I'm not sure how you can insert it backwards?

[bcrown]

It is a T60. I think i had it in backwards. The connection is just two pins on my unit (no connector per se) maybe the socket was not ever out installed, the circuit board does show a diagram for a connector.

When it was backwards, the time actually was not advancing but apparently the last inputed time was kept in a non volatile memory. When in the bios settings, the time stood still which seemed odd. After I swapped the battery around, the time in the bios settings was moving again.

In case it matters to anyone else, I now have the negative side connected to the upper pin closer to the screen.