Thinkpad bios battery question.

[Hans Gruber]

Are all the thinkpad bios batteries the same back to the T4x series? Do they all use the CR2032 lithium batteries with a two pin connector? I have no dead bios batteries currently in any of my thinkpads but was looking to stock up on bios batteries. My newest thinkpad is a T420s and was wondering if the bios battery is the same back to the T43 series.

[ajkula66]

Are all the thinkpad bios batteries the same back to the T4x series? Do they all use the CR2032 lithium batteries with a two pin connector?

Generally, the answer is "yes" excluding the R40 series with reverse polarity and 600 series which utilize a different battery from what I recall. Pretty much every other ThinkPad that I can think of from T2x series on uses the same CMOS battery.

[Hans Gruber]

Thank you George. That is what I thought. Wanted to double check with the experts here.