I have a 2017 Pro, the 11 inch. The battery shows 70% health and is having fast drain issues. It needs to be replaced. That said, given the age, I'm trying to decide if I should just replace it. I'm not really a pro-worthy user. I use it for surfing the web from my easy chair more than anything. I do play the occasional game, and will watch tv on it when I travel (which I haven't done in several years). Should I replace the battery or move on? If I move, it will be either a regular ipad or an air...thanks!