IMPROVISED BATTERY TESTER

Last week I decided to sort through some nine volt batteries I had lying around to see if they were still good. However, I could not locate my battery tester. While at a loss as to what to do for a bit, I then remembered I had an old walkie-talkie I'd received as a Christmas present thirty years ago still kicking around. I got out the walkie-talkie and used that to test the batteries. I would insert the battery, and if the walkie-talkie worked, I knew the battery was good. Of course, if the walkie-talkie didn't work, I knew the battery was dead.