Just take it easy until your new battery arrives.
Poor power = weak output.
It's like running on Flat Tires. You will go, but not fast
One thing you can try, that has worked to help failing
batteries.
Place battery in a plastic ziplock bag rolled with all the air out. Wrap a rubber band around the bag. Place in the Freezer over night. 12-18hrs.(longer is better) remove from freezer and bag and lay on a towel until back to room temperature. Fully charge and use until ful safe discharge is reached. Recharge. There is no guaranty but this can improve battery performance and has work for many in the past.