My Lenovo shuts down at 30% — does the battery need replacing?

If your Lenovo turns off around 30% (or another consistent percentage), it often means the battery voltage drops under load because the cells are worn. This is one of the strongest signs that replacement is needed.

Why this happens

• Battery gauge still shows % remaining, but the battery can’t deliver stable voltage.
• Under load (video calls, many tabs, gaming), voltage dips trigger shutdown.

Lenovo-specific checks

• ThinkPad dual-battery: confirm whether the internal or external battery is the weak one.
• Make sure conservation mode isn’t confusing your expectations (it won’t cause shutdowns, but it can limit charge %).

Confirm with Battery Report

powercfg /batteryreport

If Full Charge Capacity is significantly reduced and shutdowns repeat, a new battery is usually the correct fix.

What to order

• Battery: match FRU/Part Number, V/Wh, connector.
• If you also see charging issues, verify charger type and wattage.