I recently bought a 2017 Mazda 3 Sport Nav, since I purchased the car it seemingly randomly decides not to start. I hear the clicking of the starter and the headlights come on but the car doesn't start. As I'm currently not commuting my initial thought was that the short journeys I am taking are draining the battery, however all the electrics work still. To get the car to start I use a jump starter which obviously inst ideal. Strangely however I have used the jump starter 6/7 times without it having to be recharged, when I plug it in to recharge it says it is still fully charged like it isn't using any to jump the car, any ideas as to what's wrong would be appreciated. Thanks

 

First go to a location the will check the health of your battery for FREE. This is a load Test.

Then check and clean the battery terminals and pay attention to the ground leads both at the battery and at the body/frame location.