State of charge issue - Dell laptop

[king1]

that looks fine, and genuine, from what I can see

This bit means the capacity hasn't degraded at all...
DESIGN CAPACITY 96,997 mWh
FULL CHARGE CAPACITY 96,997 mWh

you could try unplugging the charger from the wall for a minute or so - they are reasonably intelligent chargers these days so it would be the equivalent of a reboot...