When it’s the battery, and when it’s something else.
Likely causes
- Battery has genuinely worn out with age and charge cycles
- Background programs keeping the laptop from resting properly
- Screen brightness or settings using more power than needed
What usually helps
- A battery health check before assuming it needs replacing
- A battery replacement where that’s confirmed as the cause
- Power settings adjustments that can noticeably extend runtime
A quick check tells you whether it’s the battery or something else, worth doing before buying a replacement.