Got a new Mini 4 around the third week of April and I ran the Battery Life app yesterday and see that the battery life wear is down 2% to 98%. When I ran it new back at the end of April it was at 100% Is the app accurate? Isn't 2% wear for a infrequently- moderately used tablet (not heavily used) a bit worrisome? It's only been roughly 1.5 months. Thanks.