Battery replacement and charging repair are separate decisions
A service warning or very short runtime can support a battery assessment, but a MacBook that never charges can also involve its adapter, cable, connector or logic board. Include whether it runs from the charger, the battery warning shown and what happens when the charger is removed. The proposed battery must be confirmed for the exact model.
Understand the part, fitting and testing
Before approval, confirm the battery option and condition, installation, post-fitting charging checks and applicable warranty. Ask for any extra work to be listed separately. A historical price for another MacBook is not a reliable quote for yours. If you have a current backup, tell us; if important files are not backed up, mention that before any additional work.
Swelling needs a different collection conversation
If the case or trackpad is being pushed out of shape, stop charging and do not press the case closed or puncture the battery. Contact us before transport so handling can be discussed. A swollen battery is not an ordinary quick-swap appointment. The condition of the case, trackpad and internal assemblies needs assessment as well as the battery itself.