parasitic battery drain

Most multimeters require that you put the leads in different terminals to measure current. Those are always fused, and it is easy to blow the fuse. That is a constant fuss if you teach a college physics lab (how would I know). I have read that mid 2000's cars have enough parasitic draw that the battery is often drawn down in a few weeks, even if everything is new. That keeps airport parking lot guys busy jumping cars. I use a Battery Brain on all my cars (don't ask, search on ebay). Mine is the little blue box in my 65 Dart avatar.