I also lost my 4th battery bar recently (yesterday), on a 2011 Leaf with 59,846 miles. Here are the stats from LeafSpy:
AHr=42.66, SOH=65%, 385.47V, Hx=43.87%, odo=59,846mi, 8 QCs, 3506 L1/L2s
This car has been in the San Francisco bay area its whole life, where summer high temperatures are...