I have a new troy bilt pony, it's been used twice after the second time I was going to put it in the shed and when I turned the key nothing happened, I thought the keys was left on. I pushed it in the shed and the next week before I used it I charged the battery, when I put the charger on the battery it registerd 80%, I charged it to 100%. Still nothing, I've checked all the connections and made sure the parking break swithch was engaging and the blade is up... need help please

Check the solenoid. Turn key on and use a screw driver to jump the solenoid to see if the starter will kick in. In not then you have a bad solenoid. Sometimes tapping it will get the electrico magnets to work also but that still needs replaced if no current goes through it or gets hung up inside.