June 17, 2026 — A serious incident involving a Hercules 20v Lithium Ion 2.0AH battery has been reported, resulting in temporary blindness and severe eye injuries for a user after the battery exploded in their face. The individual required transport to a trauma unit for debris removal and is now undergoing ongoing medical treatment and is unable to work.
Product Details
Incident Overview
On May 28, 2026, a consumer reported a serious incident involving a Hercules 20v Lithium Ion 2.0AH battery. While using the battery with their drill, the device reportedly exploded directly in the user’s face. The force of the explosion and resulting debris caused immediate temporary blindness. Following the incident, the individual was transported to a trauma unit where medical professionals worked to treat their eyes and meticulously remove multiple pieces of debris originating from the battery. The consumer is now undergoing ongoing medical treatment for their eyes and is unable to work due to the injuries sustained.
Safety Concerns
The reported incident highlights critical safety concerns associated with lithium-ion batteries, particularly when used in power tools:
- Immediate Dangers: The primary immediate danger is severe physical injury from explosion and projectile debris. In this case, it resulted in temporary blindness and trauma to the eyes, requiring emergency medical intervention. Explosions can also cause burns, lacerations, and concussions.
- Long-Term Risks: For eye injuries, potential long-term risks include permanent vision impairment or loss, chronic pain, light sensitivity, and increased susceptibility to future eye problems. Psychological trauma from such a sudden and violent event can also have lasting effects. The inability to work due to injury also poses significant financial and personal hardship.
- Who Might Be Affected: Anyone using Hercules 20v Lithium Ion 2.0AH batteries or similar lithium-ion batteries from any manufacturer is potentially at risk if the product is defective or improperly used. Bystanders in the vicinity of an exploding battery could also suffer injuries.
- Property Damage Potential: Beyond personal injury, an exploding battery can cause significant damage to the power tool itself, surrounding objects, and surfaces. There is also a risk of fire, which could lead to extensive property damage.
What Consumers Should Do
In light of this serious incident, consumers who own Hercules 20v Lithium Ion 2.0AH batteries or similar power tool batteries should take the following precautions:
- Immediate Steps: If you experience an incident involving a battery explosion or malfunction, immediately seek emergency medical attention for any injuries. Cease using the affected product and do not attempt to repair it.
- Check Your Product: Verify if you own a Hercules 20v Lithium Ion 2.0AH battery. Always inspect batteries for any signs of damage, swelling, overheating, or leaks before and after use.
- Prevention Measures:
- Always follow the manufacturer’s instructions for charging, use, and storage of lithium-ion batteries.
- Do not use damaged or visibly altered batteries.
- Only use chargers specifically designed for your battery pack.
- Avoid exposing batteries to extreme temperatures, direct sunlight, or moisture.
- Never puncture, drop, or abuse batteries.
- Consider wearing appropriate personal protective equipment (PPE), such as safety glasses, when operating power tools.
- Reporting Procedures: If you have experienced a similar incident or have concerns about your Hercules 20v Lithium Ion 2.0AH battery, contact Harbor Freight Tools immediately. You should also report the incident to the U.S. Consumer Product Safety Commission (CPSC) at www.cpsc.gov.
Manufacturer’s Response
As of June 16, 2026, Harbor Freight Tools has acknowledged the incident report. Harbor Freight stated they take all incident reports seriously and are currently in the process of investigating these concerns. They encourage users with questions about any Harbor Freight products to contact them directly at 800-444-3353 or productcompliance@harborfreight.com. The outcome of their investigation is unknown at this time.
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.