Steve, White (and silver) were the original MTH 9V NiCad batteries used for PS/1 and 5V PS/2. Blue is the original NiCad 3.2V battery used for 3V PS/2. Green comes in various sizes and both voltage configurations, they're the more recent NiMh batteries that replaced the NiCad batteries. The green are 9V, 2.4V AA, AAA, and 2/3 AAA sizes.
2.4V No?
@SIRT posted:Need a little write - up on each battery for a quick I.D.
White?
Blue?
Green?
For the record, I noted your PM request for me to answer, I just felt that it could get me into a whole mess and I chose to let others jump on that grenade. 
@dkdkrd posted:So, now correct me if I'm wrong in one more fact re PS2-5v mayhem; When it dies, you are TOTALLY dead. IOW, you're not even going be able to run conventionally,
So I found myself in this situation with a PS2 5V stone cold dead. In fact it had gotten so hot it desoldered the capacitors right off the board. Again, this thing must have cooked and gotten nice and hot.
Well, I cut the bridge rectifier off the 5V board, kept the 5V regulator that is remotely mounted, and made this FM trainmaster run forward only reusing original "dead" parts.
Dead isn't dead, if you get creative.
@GGG posted:2.4V No?
Thanks, edited original post. 
@gunrunnerjohn posted:Steve, White (and silver) were the original MTH 9V NiCad batteries used for PS/1 and 5V PS/2. Blue is the original NiCad 3.2V battery used for 3V PS/2. Green comes in various sizes and both voltage configurations, they're the more recent NiMh batteries that replaced the NiCad batteries. The green are 9V, 2.4V AA, AAA, and 2/3 AAA sizes.
Thank you, John. I made printouts for whoever takes over my R.R. empire down the road. The few remaining PS2's will have super caps installed as time permits. The PS3 power has passed up the former PS2, so no worries there.
So far, so good super caps from Digi-Key. I bought a bag full for around 3-4 bucks ea. years ago. 6.54 today.
