I have a bosch rotak 37 ergoflex that's only been used 3 times and has stopped working. I had been using it for around 10 mins cutting my lawn which was quite long when it happened. I had stopped for a minute and when I went to carry on, nothing happened when I pulled the button. There was no smoke or smell involved. Since then I have let it cool down and changed the fuse, also the cable looks fine.