June 17, 2026 — A severe incident involving a Hercules 20v Lithium Ion 2.0AH battery has resulted in serious eye injuries for a consumer after it reportedly exploded, causing temporary blindness and requiring transport to a trauma unit for urgent medical attention and debris removal. The consumer is currently off work and undergoing ongoing medical treatment.
Product Details
Product: Hercules Hercules 20v Lithium Ion 2.0AH
Incident Overview
On May 28, 2026, a consumer reported that a lithium battery on their drill exploded in their face, causing temporary blindness. This involved being transported to a trauma unit where medical professionals worked on treating their eyes and removing multiple pieces of debris that came from the battery. The consumer is now seeking medical treatment for their eyes and is off work.
Safety Concerns
The explosion of a lithium-ion battery, as described in this incident, presents several critical safety concerns:
- Immediate Dangers:
- Explosion and Projectile Hazards: The sudden rupture of a battery can propel fragments of the battery casing, internal components, and chemicals at high velocity, leading to severe impact injuries, cuts, and punctures. In this case, debris lodged in the user’s eyes.
- Chemical Exposure/Burns: Lithium-ion batteries contain caustic and flammable electrolytes. An explosion can release these chemicals, causing chemical burns to the skin, eyes, and respiratory system if inhaled.
- Thermal Burns: Battery explosions often involve extreme heat and can lead to thermal burns.
- Fire Hazard: Exploding lithium-ion batteries can ignite, posing a significant fire risk to the user and surrounding property.
- Vision Loss: Direct impact or chemical exposure to the eyes, as experienced in this incident, can cause immediate and temporary blindness, and potentially permanent vision impairment.
- Long-Term Risks:
- Permanent Vision Impairment: Even after initial treatment, severe eye injuries can lead to long-term or permanent vision loss, scarring of the cornea, chronic pain, and increased sensitivity to light.
- Respiratory Issues: Inhalation of fumes from an exploding battery can cause lasting respiratory problems.
- Psychological Trauma: Experiencing such a violent incident and suffering severe injury can lead to significant psychological distress, anxiety, and post-traumatic stress.
- Who Might Be Affected: Anyone operating power tools equipped with these batteries, bystanders in the vicinity, and individuals handling or charging the batteries are at risk.
- Property Damage Potential: An exploding battery can cause significant damage to the power tool itself, surrounding objects, and structures due due to fire, heat, and projectile impact.
What Consumers Should Do
Given the severity of this reported incident, consumers using Hercules 20v Lithium Ion 2.0AH batteries or similar products should take the following precautions:
- Immediate Steps if an Incident Occurs:
- If you or someone nearby is injured, seek immediate medical attention. For eye injuries, flush eyes with copious amounts of water and seek emergency medical care.
- If a battery explodes or catches fire, prioritize personal safety. If safe to do so, use a fire extinguisher rated for electrical fires (Class B or C) if trained, or evacuate the area and call emergency services.
- Do not touch or attempt to move a damaged or burning battery with bare hands.
- How to Check if You Own the Affected Product:
- Examine your Hercules power tool batteries for the “Hercules 20v Lithium Ion 2.0AH” designation. The model number and specifications are typically printed directly on the battery pack.
- Prevention Measures:
- Inspect Batteries Regularly: Before each use, visually inspect batteries for any signs of damage, swelling, punctures, discoloration, or overheating. Do not use damaged batteries.
- Use Proper Chargers: Always use the charger specifically designed for your battery and tool. Never use third-party chargers that are not approved by the manufacturer.
- Avoid Extreme Temperatures: Do not store or charge batteries in direct sunlight, in hot vehicles, or near heat sources. Also, avoid using them in extremely cold conditions.
- Proper Storage: Store batteries in a cool, dry place away from flammable materials and out of reach of children.
- Handle with Care: Avoid dropping batteries or subjecting them to strong impacts.
- Proper Disposal: Do not dispose of lithium-ion batteries in regular household trash. Take them to designated battery recycling centers.
- Reporting Procedures:
- If you experience an incident with this or any other product, report it to the manufacturer directly.
- Additionally, report the incident to the U.S. Consumer Product Safety Commission (CPSC) at www.cpsc.gov or by calling their hotline at 1-800-638-2772.
Manufacturer’s Response
As of June 16, 2026, Harbor Freight Tools has acknowledged the incident report. Harbor Freight stated: “Harbor Freight thanks the submitter for bringing this report to our attention. Harbor Freight takes all incident reports seriously and is in the process of investigating these concerns. Users with questions about any Harbor Freight products are encouraged to contact Harbor Freight directly at 800-444-3353 or productcompliance@harborfreight.com.”
Legal Help Available
If you or a loved one has been injured by a defective product or suffered property damage due to a product malfunction, you may be entitled to compensation. The experienced product liability attorneys at Farzan Law understand the complexities of defective product cases and can help you navigate the legal process. Farzan Law is a California based Personal Injury law firm focusing on protecting the rights of those wrongfully injured.
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Contact us today for a free consultation: 424-325-3112
Our legal team has successfully represented clients in product liability cases involving defective appliances, automotive defects, medical devices, and consumer products. We work on a contingency fee basis, which means you don’t pay unless we win your case.
Note: This information is based on incident reports provided by the U.S. Consumer Product Safety Commission. If you find information that is incorrect, please contact us immediately so we can correct the post to reflect accurate information.
Disclaimer: The information provided in this post is not intended to be legal or medical advice. This article is based on publicly available incident reports. The incidents mentioned have not necessarily been independently verified or adjudicated.