Chosen Solution

Reaches 99% charge, but charger stays orange DC in socket ?

Sounds like the battery needs replacing. Lets run this app to gage its health CoconutBattery You’ll likely need the older version depending on your OS-X version you are running. Contact chris (at) coconut-flavour.com for the older version (let him know we asked) Post a snapshot while your systems MagSafe charger is plugged in here Adding images to an existing question