> isolate the battery I wonder why its not just two interconnecting cylinders (using a tiny gasket) that you push together with thumb/finger when you want to a

> isolate the battery I wonder why its not just two interconnecting cylinders (using a tiny gasket) that you push together with thumb/finger when you want to activate/power the device. Given that there would have been some serious engineering to think through the design there must have been trade-offs that I'm not considering though.