Install NVRAM in your TSPP. It is a plug in play, 30 second upgrade. Easy to change as a game ROM. http://www.pinitech.com/products/6264_nvram.php

For the other games in your collection, if you're not wanting to do the soldering for NVRAM to remove the old RAM and install an IC socket, I could do the 3 for you, or upgrade to Lithium batteries that should not ever leak.

Unfortunately, you are too late. You have alkaline damage at minimum of what is in red. Yellow area is suspect.
Remote battery holder install Pinside Forum - Microsoft Internet Explorer prov_2018-04-09_16-44-08 (resized).png

I say, just install NVRAM and never have to worry about throwing another single battery in the trash. Go green as they say.
DE/Sega/Stern Whitestar boards already have the old RAM in a socket and anyone can change it who has changed a game ROM. True plug and play on those boards, 30 seconds and done.

For NVRAM on System 11 and WPC, I can install remove the old RAM and solder in an IC socket and install the NVRAM in 20 minutes. I'm willing to do this for anyone wanting my help.

Yes, it is a good thread for it. Brings to the attention of what many people do not know what they are looking for when someone says to look for battery corrosion, much less the need to continuously change alkaline batteries or suffer their ill affects. It also shows the alternatives to batteries.

That is a very nicely done repair, Sir. Well done! +1 for NVRAM that never forgets.