I have an old Triplett 631 VTVM/VOM (that I use with classic computer stuff, of course) that uses a Burgess XX15 battery. The XX15 is 22.5V and is no longer made. There is a "fix" for this situation posted on the Web that substitutes several currently made 22.5V batteries. But, I'd like to see if there are any other ways of replacing the XX15s. So, does anyone have an old spec sheet for the Burgess XX15? I couldn't find anything on the Web. Thanks, Dave