Laptop Battery Pack: swollen battery cells. Internal gas generation expands one or more lithium pouch cells.

The distinguishing clue

The case, keyboard or touchpad begins lifting and the pack may feel warm.

Checks before an assessment

If the case is flat and the pack is not unusually hot, record the reported charge and runtime. Leave any swollen or damaged device off and unplugged.

Stop point: A swollen, leaking or unusually hot lithium battery must not be charged or compressed.

Workshop confirmation and repair

Device-level check: Assess swelling without load testing, then identify the exact replacement pack and inspect the surrounding case for pressure damage.

Targeted check: Shut down, disconnect power and inspect without pressing the affected area. If confirmed: Remove and replace the swollen battery using safe handling and disposal.

Repair boundary: Replace a confirmed worn or unsafe battery with the exact compatible pack and verify charge control.

Related cause to rule out

When runtime falls steadily and the laptop may shut down when demand increases, also consider Laptop Battery Pack: worn battery cells before choosing a repair.

Checks after the work

After repair or replacement, check charging to full, controlled discharge, sleep and several charger transitions.

For an AEPC repair assessment in East Auckland, provide the exact model and observed clue. Call 027 908 8880 before visiting the Burswood workshop.