Compare like with like
Measure runtime under similar brightness, applications and network use. A video call and reading a document are different workloads; one short session cannot establish battery wear.
Review battery information and settings
Check the manufacturer's battery-health tools and power settings. Reported capacity is useful evidence, not a guarantee of remaining life. Background activity or charging limits can change behaviour without requiring a new battery.
Treat swelling differently
If the case or trackpad lifts or a battery appears swollen, stop using the laptop and seek manufacturer guidance. Do not press, puncture or attempt an improvised battery repair.
Choose the next step
Record charge behaviour, unexpected shutdowns and the exact model. Discuss replacement only after evaluating the battery, charger and workload. A new battery cannot promise original runtime under changed software and usage.
Questions about this guide
How can I compare battery life fairly?
Repeat similar work at the same brightness and power settings. Video calls, updates and demanding apps can change runtime, so one short session does not establish battery failure.
What battery symptoms need prompt attention?
Stop using a device with a swollen battery or lifting casing and follow the manufacturer's repair guidance. Do not press, puncture or attempt to flatten the battery.