CRT 428 smell

Love my CRT 428. But...my wife claims there is an electrical smell my tractor gives off after I use it and it sits in my garage. To be safe I took off the rear basket, checked all the wiring, cleaned the entire mower including a vacuum. Wife is afraid it is going to catch on fire. I told her I would take the batteries out while it is stored. I want to know...is the electrical smell normal for an hour or so after it mows? If it is normal I will leave the batteries in. TIA.