By popular request (ok...thanks Bob!)  - I am placing this back where it can be seen.  

   I did a series of pictures and notes about replacement of bad and failing batteries on older PC motherboards some time back and it should be helpful to folks who are trying to do that and are not so familiar with such work.  It could also apply to a number of RTC clock cards and some game system boards too. 
 (link updated in 2017 as PCFIXES.COM was sold and fell back to their second domain name PCFIXES.NET)