MacBook Pro mAh maximum capacity

Hi C0LE__,

Thank you for using Apple Support Communities. I understand wondering if the maximum battery capacity in your MacBook Pro dropping 149 mAh in a week is something to be concerned with. Are you having battery life issues as well or any notifications of an issue? As batteries chemically age they begin to hold less of a charge.

I've attached a resource that can help:

About Mac notebook batteries

Specifically the section about the battery status menu:

"To see the health of your battery, hold the Option key and click the battery icon in the menu bar to reveal the battery status menu. You'll see one of the following status indicators:

• • Normal: The battery is functioning normally. 
  • Replace Soon: The battery is functioning normally but holds less charge than it did when it was new. You should monitor the health of the battery by checking the battery status menu periodically.
  • Replace Now: The battery is functioning normally but holds significantly less charge than it did when it was new. You can safely continue using your computer, but if its lowered charging capacity is affecting your experience, you should take it to an Apple Store or Apple-authorized service provider.
  • Service Battery: The battery isn’t functioning normally. You can safely use your Mac when it's connected to an appropriate power adapter, but you should take it to an Apple Store or Apple-authorized service provider as soon as possible."

If you are not experiencing a message in this menu where it tells you to replace soon, now or service I would not be concerned with the mAh.

Take care!