Data Recovery Case File · Thermal Damage · Battery Failure

Smoke on standby: a swollen battery, a cooked laptop, and the drive that came through it

The unsettling part of this enquiry was how little its owner had done to cause it. The laptop wasn't charging. It wasn't in use. She was simply sitting beside it while it slept — and its lithium battery expanded and began emitting smoke, damaging the machine around it. Her enquiry reconstructed events with careful honesty (perhaps, she guessed, because it was rarely shut down fully), and asked the practical question underneath the alarming one: the drive inside had been through a heat event of unknown severity — could its contents be saved?

What heat does to a drive — and what it usually doesn't

A battery thermal event bathes everything around it in temperatures laptops were never specified to meet, and a hard drive takes that bath unevenly. The most heat-sensitive residents suffer first: the electronics can cook, the bearing's lubricant can thin and migrate, and the heads — already the frailest components in any drive — age years in minutes. What generally endures is the part that matters: the platters themselves are thermally robust far beyond the surrounding plastic's tolerance, and the magnetic patterns on them — the data — survive heat that ruins everything tasked with reading them. Her drive followed the pattern to the letter: board inspected and proven serviceable after the smoke's chemistry was cleaned from it, spindle sound, platters unharmed under examination — and a head-stack that had come out of the sauna unable to do its job, announcing itself with the clicking she'd heard on the cautious post-incident power-up.

The recovery

From there, the archive's most travelled road, walked with post-thermal care: a donor head-stack fitted at the bench; the drive brought up gently on the PC-3000 with its self-maintenance stood down and its behaviour watched for any lingering heat eccentricities; and Data Extractor imaging conservatively — the surfaces proving, as hoped, to have kept their records perfectly beneath the ordeal. Her volume came off the image intact and verified: documents, photographs, the laptop's whole civilian life, delivered on new media while the machine itself went for safe disposal.

Outcome — and the part that outranks the data

Full recovery — and a safety note this page refuses to shrink, because a swollen battery is not a computer problem, it's a small fire that hasn't finished deciding. If a laptop, phone or power bank ever bulges, creaks at its seams, or smells hot and sweet: stop using it, stop charging it above all, don't press the swelling or puncture anything, move it onto a hard non-flammable surface away from anything that burns, and get it to proper battery disposal — not the household bin, where these events finish what they started in collection trucks. Her habit of never fully shutting down likely kept the battery warmer across more of its life than it needed to be; batteries age with heat and cycles, and a machine that's always half-awake is always half-charging its way through both. The data was the recoverable part of this story. She was the irreplaceable one, and she was sitting right next to it.

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.