I have been reading lately that testing has been done on the life of Lithium-Ion batteries compared to their charging regime. These tests show that limiting the charge to 70-80% of battery capacity extends the life of the batteries dramatically. Nissan does not mention this is the owner's manual for my 2018 Leaf 40. There does not seem to be any easy way to limit the charge to a percentage on this model. My Tesla buddy only charges his S to 80%. So did Nissan miss this seemingly important item? Or maybe the Leaf's battery is immune (not likely)? I do not need the range of the Leaf 40 most of the time, as my commute is 50 kms each way. So perhaps I need to set the timer to limit the amount of charge each time. Arghh that's too much math every day. Any ideas?