My MacBook Pro battery only lasts 30 minutes

mirajudeen wrote:

MacBook Air

Sorry, but which is it MacBook Air or MacBook Pro? Regardless, which exact model is it? You can find out, by selecting the Apple icon on the upper left-hand side of the macOS menu bar, and then, select "About This Mac."

Apple does not consider a Mac laptop's battery requires replacement unless it cannot maintain up to 80% of its original capacity after 300-1,000 full recharging cycles, depending on the exact Mac model.

To check your current cycle count: Hold down the Alt key and click the Apple icon in the upper-left corner and then choose System Information. Next, click Power from under the Hardware category in the left panel and look for the number for Cycle Count under Health Information.

Ref: Determine battery cycle count for Mac laptops - Apple Support

Could be a number of reasons, but we would need to know a bit more about which exact model your MacBook Pro is, and is this its original battery?