Data Recovery Case File · Mac & Apple Ecosystem · Safety First, Then Data

A Burst Trackpad Is a Battery

Her enquiry covers two retired machines and mentions the important thing almost in passing. The first had "a kernel panic and never could reboot itself properly again." The second, older one "suffered from overheat and eventually a burst trackpad." Both are straightforward recoveries for their generation. But a trackpad that has burst upward from beneath is a swollen lithium battery, and that needs addressing before anything else — because it is a fire risk sitting in a cupboard, and how it is handled matters more than the data on either machine.

The decode: the battery first, then the two machines

What a burst trackpad means: the battery cells sit directly beneath it. As a lithium cell ages and degrades — particularly one that has been through overheating — it can generate gas internally and swell, and because the case is rigid the only place the expansion can go is upward, lifting the trackpad and eventually the keyboard. That is not cosmetic damage; it is a chemically unstable cell in a sealed enclosure.

What to do with it, and this comes before any question about data: do not charge it or connect it to power. Do not press the trackpad back down, and above all do not puncture, bend or pry the cell — a punctured lithium cell can ignite. Keep the machine somewhere cool, away from anything flammable, and not in a bedroom or a cupboard full of paper. Do not put it in a bag or a car boot in warm weather. It should not be posted, either — swollen cells are not acceptable in the post, and any machine in this condition should be transported in person and declared.

Why this is worth the space: people store old laptops for years and swollen batteries are extremely common in machines of that age. The trackpad rising is usually the first visible sign, and it is very often dismissed as the case warping. Anyone reading this with an old laptop in a drawer should press on the trackpad: if it feels raised or springy, the same applies.

Now the recoveries, both of which are straightforward. Machines of those generations carry storage on a module that unclips from the board, so neither machine needs to work. The module is removed and read on a matched adapter, which makes the kernel panic, the overheating and the battery equally irrelevant to the data.

What the kernel panic machine probably has: a system that cannot complete start-up — a damaged system file, a failed update, a filesystem inconsistency — none of which touches user files. It is worth noting that repeated panics can indicate failing hardware, so its drive is assessed rather than assumed.

The one thing to establish for both: whether either had disk encryption enabled, since a module read away from its machine needs the password. On machines of that age it was optional and frequently off, but it should be checked rather than discovered.

On the bench

The swollen cell was handled as a safety matter before any assessment — the machine kept uncharged and unpowered, stored cool, and neither pressed, bent nor punctured, since a compromised lithium cell in a rigid enclosure is an ignition risk regardless of what is on the drive. Both storage modules were then removed and read on generation-matched adapters, taking the condition of both machines out of the question entirely, imaged write-blocked, and contents verified by opening.

The outcome

The battery handled as a safety matter first, both storage modules read independently of their machines and the contents verified. Free assessment, one fixed written figure including VAT; where a chip has to be removed, 50% of parts and labour is payable upfront with the balance only on success — otherwise no recovery, no fee. The decode, for anyone with an old laptop whose trackpad has risen: that is a swollen battery, not a warped case. Don't charge it, don't press it flat, don't puncture or bend it, keep it cool and away from anything flammable, and don't post it. Once that is dealt with, the data itself is straightforward — machines of that generation carry storage on a module that reads independently of the machine.

Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.