Negligence in the context of product liability is based on the concept of a duty of care that is owed to the consumer by the manufacturer, distributor, or seller of the product. This duty of care requires these parties to use reasonable care in the design, manufacture, and distribution of their products to ensure that they are safe for consumers to use.

If a product has a defect that is caused by a failure to exercise this duty of care, and this defect causes harm to a consumer, then the manufacturer, distributor, or seller may be held liable for negligence in a product liability case.

To prove negligence in a product liability case, the plaintiff must show that the manufacturer, distributor, or seller had a duty to exercise reasonable care, that they breached this duty by failing to take adequate precautions, and that this breach of duty directly caused the plaintiff's injuries or damages. The plaintiff must also show that they suffered harm as a result of using the product in its intended manner.