Hi folks It looks like in NMC lithium charging to 4.2 vpc is 300-500 cycles or to 4.1 is 600-1000 cycles or 4.0 is 2400-4000 cycles. Certainly overcharging is bad but I've seen other studies on high mileage Leafs in England that were 100% charged that showed little degradation after 50k miles. Just trying to figure based on real data if charging to 80% which loses the balancing function or going to 100% on my Leaf on each cycle is best. I assume Nissan isn't overcharging their cells on each cycle. It looks from the Leaf spy that most cells are at 4.0 volts at 100% charge. Does anyone have EOC data on the Leaf? My son drives it daily 15 miles round trip and then plugs in at home to 100% Thanks mark http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
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