I understand that the recommendation is to keep the battery between 20% and 80%. I don't drive a lot, so I only need to charge every week, but other people just plug it in every night. In the old days, the recharge cycles was what "wore out" a battery. So, my question is this, is it better for the battery to wait until I get close to the 20%, so that I recharge less frequently, or does this matter?