Hello and thanks for the replies and feedback. Untergeek, I saw your page before posting. Thanks for sharing your info and experience. I few thoughts. My Matrix still has the original battery and still works. But as these get older, my concern is more about leak damage than failure.
Yes, soldering a lead battery may be the same work as a holder but, there are several advantages to a holder. Its easier to switch out the battery with a standard coin cell. In some instances you have to disassemble and remove circuit boards to do this correctly. Ordering the specific lead battery is a little more expensive and could be old sitting on shelves for years. A standard CR2032 can be purchased at any local vender without having to order it and have it shipped.
While a standard holder may "look" like any other there are many different configurations of lead placement and spacing. Its important to ensure you get the correct part number for each replacement. Its not as simple as just buying any holder.
I plan to doing this on all instruments that have soldered batteries and will document/share what the correct or comparable part numbers and procedure tips for reference so others have it. (Once I know what that exactly is that is...) :)
Much like the battery replacement section on Gearslutz, it would be great to include or create a similar reference for soldered batteries to holder/coin cell conversions.