Ultrabook Internal Battery: 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

Look for a raised touchpad, separating case seam or changed keyboard fit without pressing on it. Any swelling is a reason to stop charging.

Stop point: Do not press a raised touchpad or bend a swollen pouch cell.

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 the exact thin battery and inspect the palm-rest structure for pressure damage.

Related cause to rule out

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

Checks after the work

After repair or replacement, check case fit, touchpad, full charge, discharge, sleep and temperature.

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