Why is battery less than 100% when Mac has been plugged in for weeks?
I have a MacBook Pro 2021. It has been plugged in to the electricity for days if not weeks and so I have not been using the battery. So why is the battery only on 88% charge?
I haven't used the battery in ages. And surely when it is using the power adapter it will recharge the battery to 100%?
It also says 'Charging on hold. Rarely used on battery' – what does this mean? My old Mac would always charge the battery to 100%.
It now says 87% so it is going down, even though it is plugged into the electricity. I don't understand.
MacBook Pro 16″, macOS 12.2