I've read that the best way to preserve longevity of the cells is to charge frequently to 80%. However with my daily driving habits this is not practical. I drive about 8miles a day which doesn't take much energy out the battery so I've opted to fully charge the car to 70% on Sunday night and run it down to about 30% throughout the week. I basically charge only once a week on NEMA 14-50 service. Will this routine damage my battery over the long term?