Can a Laptop Battery Be Replaced?
In most cases, yes. Battery availability and difficulty vary by laptop model — some are straightforward swaps, others are built in a way that makes replacement more involved, but it's rarely impossible.
What affects the job
Some laptops have an easily accessible battery; others have it built in under the keyboard or trackpad, requiring more disassembly. Either way, the battery itself is a wear part that's expected to need replacing on any laptop used for a few years.
What to expect
Cost and part availability depend on the specific laptop model, so it's worth having the exact model checked before assuming either way. This is a routine repair, not a specialist or unusual one.