2012 800 Outlander issues

I have a 2012 outlander 800. I have a issue with my electrical and not wanting to start. I can let it sit for a week or month sometimes and it will crank right up and sometimes it want. And then we will be riding and every time we stop i have to jump it off. And then sometimes it will crank up. I have put a new battery in it 3 times in the past year, and not the cheap ones. I would expect this out of my 2008 outlander but not my wifes 2012. It barely gets over 15 miles per hour and it is babied. :th_smiliepullhair::th_smiliepullhair::th_smiliepu llhair: