Lithium Battery Evidence Checklist: What to Gather After a Fire or Explosion

If You Were Hurt or Lost Someone: Who This Checklist Is For and When to Use It

If you were hurt in a lithium-ion or rechargeable battery fire, explosion or overheating event, or your family is dealing with a death, this checklist is written for you. Many of these events involve thermal runaway, a self-sustaining chain reaction inside a battery cell that generates heat faster than it can escape, causing fire or explosion. The site's page on lithium battery thermal runaway explains that process in more depth.

The claims that follow these events are usually product liability claims. Product liability is a legal theory under which a manufacturer, a seller or others in the distribution chain may be held responsible for harm caused by a defective product. A defect generally comes in three types. A design defect is a flaw in how the product was designed. A manufacturing defect arises when one unit differs from its intended design. A failure to warn means the product lacked adequate instructions or warnings. Whether any of these applies depends on the facts.

What is at stake is practical. Evidence that exists today may be lost, altered or thrown away before anyone asks for it, and what remains often shapes what can be shown later. Time limits matter too. A statute of limitations is the time limit a state's law sets for filing a lawsuit. These periods, and wrongful-death rules, differ from state to state. For someone in this position, the early questions are usually what still exists, where it is, and who has it. This page offers general information only and does not determine fault, liability, a deadline or what any case is worth.

How This Checklist Is Organized Around What a Claim Has to Show

The checklist groups evidence into the seven categories that battery-fire claims usually depend on:

1. The scene and the product, vehicle or equipment involved
2. Photographs, video and digital records
3. Medical records and bills
4. Reports made at the time and who holds them
5. Witnesses and their contact information
6. Records others hold
7. Insurance documents and correspondence

Each item carries a short note on why it can matter to a product liability or wrongful-death claim, so the purpose of each record is clear, not only its name.

The order follows the chain this kind of claim usually travels: the battery, the product it powered, who made and sold it, any recall or warning, how it failed, the injury, and the law of the state where it happened. A federal regulation on product defects gives a sense of why each link matters. Under 16 C.F.R. § 1115.4, a defect "is a fault, flaw, or irregularity that causes weakness, failure, or inadequacy in form or function." The same regulation says a defect may come from a manufacturing or production error, from the design or materials, or from a product's "contents, construction, finish, packaging, warnings, and/or instructions." That regulation governs when companies report to the Consumer Product Safety Commission, but it shows how many places a defect question can lead.

Not every item exists in every incident. Many people find it useful to work through the list once, marking what they have, what someone else holds and what is gone. Noting what is missing is useful in itself.

The Burned Device Is Often the Key: The Scene and the Product, Vehicle, or Equipment Involved

If the device that caught fire is still in your garage or on the scene, it is usually the center of the evidence. A design, manufacturing or failure-to-warn claim depends on what the product was and how it was made. Physical evidence that often matters includes:

• The battery-containing product, such as an e-bike, e-scooter, hoverboard, power bank, phone, laptop, power tool or home battery. It is often the primary subject of forensic examination.
• The make, model, serial number and any certification markings, such as a UL listing, on the product or its packaging. These identify exactly which product was involved and whether it matches a recall notice.
• The battery itself, including visible cell markings, capacity ratings and country-of-origin labels. These can point to who made the cells, which may differ from who made the device.
• The charger and charging cable, with their markings. Whether the original or a replacement charger was used can bear on how the failure happened.
• The battery management system, if it is accessible or recoverable. A battery management system is the electronic circuit that monitors and controls a battery's charging and discharging. Its condition can bear on whether a control failed.
• The location of the incident and its condition before cleanup. The scene can help show where the fire started and how it spread.
• Other equipment, furniture or structures damaged by the fire or explosion. Burn patterns on nearby surfaces can help trace the origin.

Forensic investigators typically examine the product in the condition it was in right after the incident. Once a scene is cleaned or a product is thrown away, that examination may no longer be possible. That is why people in this position often weigh, early on, where the device is now and whether a cleanup or disposal is already scheduled.

Photographs, Video, and Digital Records

Photographs and video capture conditions at a moment that cannot be recreated. If you were hurt or lost your home, pictures on a phone may be the only record of how the room looked before the cleanup crew arrived. Visual and digital records that often matter include:

• Photographs of the product, battery, charger and scene taken before cleanup or repair. They show damage that changes once debris is moved.
• Photographs of burns or other injuries, taken at the time of treatment and during recovery. They show the nature and location of injuries over time.
• Video from security cameras, doorbell cameras or bystanders that captured the incident or its aftermath. Footage can show when and where the fire started.
• Timestamps and metadata embedded in digital photographs. This data can help establish when and where an image was taken.
• Screenshots or records from an app, device dashboard or smart-home system that logged the product's activity. A charging log or error message can help show what the product was doing beforehand.

A practical next step many families take is checking phones, cloud backups, neighbors' doorbell cameras and device apps, since some of these records may be overwritten or deleted over time.

Medical Records and Bills

If you or a family member was burned or injured, your medical records do more than track recovery. They show the nature and extent of the injuries and the treatment they required, and a product liability claim also has to show causation, meaning that the incident caused the injuries claimed. Medical records are usually the main evidence of that connection. Records that often matter include:

• Emergency room and hospital records from the date of the incident. They record the first observations of the injuries.
• Records of later treatment, including surgery, wound care, rehabilitation and mental health treatment. They show how the injury progressed.
• Photographs of injuries taken by medical providers. These are clinical records made close in time.
• In a death, the autopsy report and death certificate. Wrongful death is a legal claim brought by survivors or a decedent's estate when a person's death is caused by another's wrongful act or a defective product. These records usually address the cause of death.
• Medical bills and explanation-of-benefits statements from insurers. They document the cost of care.
• Records of prescription medications related to the injury. They show ongoing treatment.
• Records of lost wages or income, such as pay stubs, employer letters or tax records. They document time away from work.

The losses a claim may address, such as medical expenses, lost income, pain and suffering, and wrongful-death damages, are called damages, and the categories the law allows differ by state. Medical records and bills are how such losses are usually documented, so many people keep a running folder of bills and statements as they arrive. This page describes records only as categories and offers no view on any diagnosis or treatment.

Where the Fire Department's Account Lives: Reports Made at the Time and Who Holds Them

If firefighters, police or paramedics came to the scene, their reports may hold the earliest independent account of what happened, recorded before conditions changed. They may identify the product, the suspected origin of the fire and the people involved. Reports that often matter include:

• The fire department incident report. It may record where the fire started and what the investigators observed.
• A police or law enforcement report, if one was made. It may list the people present and statements taken.
• The emergency medical services or ambulance report. It records the injured person's condition at the scene.
• A consumer product safety incident report, if one was filed. The Consumer Product Safety Commission maintains a public database of product safety incident reports. That database may also show prior reports about the same product, though an incident report does not establish what caused an injury.
• Any report made to the product's manufacturer, seller or importer. It shows what the company was told and when.
• Any report made to a building owner, property manager or employer. It records the account given at the time.

These records are held by the agencies or businesses that created them, and getting copies may require a formal request. A useful first step is often simply writing down which agencies responded and any report or incident numbers given. The National Fire Protection Association keeps lithium-ion battery resources that offer background on how these fires are understood.

Witnesses and Their Contact Information

Witnesses can confirm what happened, who was present and how the product looked before and after the incident. Their accounts can support or clarify the physical evidence and the documents. Witness information that often matters includes:

• Names and contact information of people who saw the incident. They can describe how it unfolded.
• Names and contact information of people who saw the product beforehand. They may know its condition and how it was used or charged.
• Names of first responders, if known. Their observations may add to their written reports.
• Names and contact information of neighbors, bystanders or building occupants who were present. They may have seen where smoke or flames first appeared.

Memories fade, and people move or change phone numbers. A name written down soon after the incident is often easier to follow up on than one recalled months later.

Records Others Hold: Manufacturers, Sellers, Operators, and Maintenance Providers

Many of the most important records sit with businesses in the product's chain of distribution or use. These include manufacturers, importers, sellers, rental operators, maintenance companies and employers. Their records may bear on a design, manufacturing, failure-to-warn or negligence claim. Records that often matter include:

• Purchase or order records, such as a receipt, an order confirmation, an invoice or an online order history. These show where the product came from.
• Product registration records, if the product was registered. Registration can show who was notified of a recall.
• Warranty records and any communications with the manufacturer or seller about the product. These may show earlier complaints or repairs.
• Recall notices. The Consumer Product Safety Commission publishes recall notices. Under 15 U.S.C. § 2064, a notice issued under a Commission order generally includes, among other items, the product's model or SKU number, a description of the hazard, the dates it was made and sold, the remedy, and the number and description of any injuries or deaths associated with it. The site's lithium battery recall lookup walks through those fields. A recall is not a finding that the product injured anyone, and the absence of a recall is not proof that a product was safe.
• Maintenance, inspection or service records for the product or the e-bike, e-scooter or hoverboard it powered. These show how the product was cared for.
• Rental or lease agreements, if the product or vehicle was rented. These identify who owned and maintained it.
• Employer records, if the incident happened at work or involved a work-provided product. These may show who supplied the device.

The same statute requires manufacturers, distributors and retailers that obtain information reasonably supporting the conclusion that a product contains a defect that could create a substantial product hazard, or creates an unreasonable risk of serious injury or death, to "immediately inform the Commission," unless they know the Commission has already been adequately informed. Such reports are held by the companies and the agency. Getting records from manufacturers, sellers and operators usually requires formal legal process. A few distinctions apply throughout: a recall is not a defect finding, an incident report is not proven causation, a lawsuit is not a finding of liability, and an allegation is not a fact.

Your own purchase records, order history and warranty emails are often the easiest part of this category to find. Which company-held records exist, who holds them and how they can be requested is one of the things a conversation with our attorney can help sort out.

What You Tell Insurers and Companies Can Matter: Insurance Documents and Correspondence

Insurance records and written messages document the money side of the incident and how others described it. Records that often matter include:

• A homeowner's or renter's insurance policy and any claim filed after the fire. These document property losses and payments.
• Health insurance records for treatment of the injuries. These show what was billed and paid.
• Disability insurance records, if any. These document lost income support.
• Written communications with the product's manufacturer, seller, importer or distributor after the incident. These may contain admissions, denials or descriptions of the incident.
• Written communications with a property owner, landlord or employer. These record how each party described what happened.
• Written communications with an insurer, whether the person's own or another party's. These may describe the incident in ways that matter later.

What a person writes to an insurer or a company after an incident can affect a later legal claim. Emails, letters and claim forms often become part of the record, so many people keep copies of everything they send and receive. What a particular message means for a potential claim is something an attorney can review.

Keeping What You Have: Originals, Copies, and a Simple Log

Once records start to pile up, organization matters. Injured people and families often follow a few simple practices:

• They leave the product, charger and battery in the condition they were found, without cleaning, repairing or altering them. Changes can affect what an examination can show.
• They make copies of documents and store them apart from the originals.
• They note the date each item was gathered and who holds it now.
• When an item has been lost, thrown away or is held by someone else, they write down that fact and the circumstances.

These habits support chain of custody, the documented record of who has held or controlled a piece of evidence and when. Chain of custody for physical items, and the completeness of the paper record, can affect how evidence is used in litigation.

A missing item does not make the rest of the list pointless. If a burned device went out with the debris, photographs, fire reports, purchase records and witness accounts may still show what it was. A short note explaining what was lost, when and why becomes part of the record too.

What This Checklist Cannot Do

A checklist can show what usually matters. It cannot apply the law to what happened to you, and it does not account for the specific facts of any incident, decide eligibility or set a deadline.

The rules that decide these questions are set mostly by each state:

• Limitation periods differ by state. Some begin to run on the date of the incident and others when the injury was discovered, and many states have exceptions.
• Fault rules differ. Comparative fault is a rule that reduces a claimant's recovery by their share of fault. Contributory fault is a rule that may bar recovery entirely if the claimant was at fault.
• Damages categories, and any caps on them, differ by state.
• Wrongful-death rules differ, including who may bring the claim, what damages are available and when the period runs.

The site's lithium battery injury lawyer page explains how these claims work generally. Questions about how deadlines, fault and damages apply to one incident depend on its facts and the state involved.