Replacing MacBook batteries take 2-4 hours depending on the model. We use OEM batteries, which we back with a 90 days warranty.
We recommend a replacement if the MacBook battery cycle count are near 1000 or more, not holding charge or if the battery is expanding and pushing up on the keyboard and trackpad or under the bottom case
Most companies must outsource component level motherboard repair for screen , keyboard and battery replacement, because they don’t know how to do it or they don’t have the necessary tools. This causes long delays and unexpected surprises; the person you are talking to does not work for the company repairing your MacBook / Laptop. With AppleMac, the buck stops here. We repair your logic board and all your parts replacement, and you only deal with us. Our company has repaired couple hundred of MacBook / Laptops.