I have an older Calterm Electronics 66420 digital multimeter, but when I opened it up to replace the 9v batter, I found out it doesn't have a fuse in it. I can't find anything on the Internet about what size fuse it should hve. It says on the front 200mA MAX, so I'm guessing that it's a 200mA fuse. But I wanted to be sure. Does anyone out there have one of these that they could check the fuse size on for me?