MacBook Pro battery capacity is significantly reduced

Batteries are considered a consumable part; that means they will not last forever. It will need to be replaced.

Contact Apple support (use the link in the upper right corner of this page) or an authorized service provider for an estimate.

Are you covered by Applecare?

olawale231 wrote:

the battery's capacity is significantly reduced. to restore capacity

macOS Catalina 10.15.5 introduces battery health management, a feature designed to improve the lifespan of your Mac notebook's battery.

"battery health management may reduce your battery's maximum charge when in this mode."

About battery health management in Mac notebooks https://support.apple.com/en-us/HT211094

The battery health management software (BHM) can put on hold your charging this is the new normal.

It interpolates your usage pattern, and can hold it at 92% 84% 72% etc. however it deems best.

Click the battery icon in the upper right if you need 100% charge for portability

Learn how to get your Mac fixed and how much it will cost.

https://support.apple.com/mac/repair/service

Get your Mac ready for service - Apple Support https://support.apple.com/en-us/HT209095

Service programs—

13-inch MacBook Pro (non Touch Bar) Battery Replacement Program- October 2016 and October 2017

https://support.apple.com/13inch-macbookpro-battery-replacement

15-inch MacBook Pro Battery Recall Program- September 2015 and February 2017

https://support.apple.com/15-inch-macbook-pro-battery-recall

If the battery in your 2016 or 2017 MacBook Pro won't charge past 1%—

The battery health status on these devices will also indicate "Service Recommended."

Published Date: February 09, 2021

https://support.apple.com/en-us/HT212163

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my battery capacity has reduced and I want to gain it back to 100