Assuming 2018's are like my 2019, there are a series of displays you can step through on the left side of the driver display. You select the displays using the arrow keys and "OK" button on the steering wheel. One display group has battery temperature, battery capacity, and estimated charging time. Another display group has mi/kWh, average speed, and distance/time since reset; tire pressures; and status of some driver assist features. There is also a setting group which allows programming of many features that were programmed using the navigation screen on earlier cars. The remaining groups have information about the entertainment and navigation system (radio stations and travel directions, for example). The left/right arrows select between groups and the up/down arrows select displays within the group.
The battery capacity display is a bar graph with 12 segments. There are tick marks to show each segment. The battery temperature is also a bar graph that looks like a mercury thermometer, but there are no tick marks so the 12 segments are not obvious.
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019