The U.S. Consumer Product Safety Commission (CPSC) is warning consumers to immediately stop using certain lithium-ion batteries sold for Rad Power Bikes e-bikes, citing a serious fire hazard that has already led to dozens of incidents and hundreds of thousands of dollars in property damage.

According to the agency, batteries with model numbers HL-RP-S1304 and RP-1304—used in several popular Rad Power models—can ignite or explode, especially when exposed to water or debris. The affected bikes include the RadWagon 4, RadCity HS 4, RadRover High Step 5, RadCity Step-Thru 3, RadRover Step-Thru 1, RadRunner 1 and 2, RadRunner Plus, and RadExpand 5.

Federal officials say they have received 31 reports of fires, including 12 cases that caused property damage totaling approximately $734,500. Some fires occurred while the battery was not charging and even when it was simply being stored.

The batteries were sold nationwide through RadPowerBikes.com, Best Buy stores, and bike shops, both as replacements priced around $550 and as part of complete e-bikes costing $1,500 to $2,000.

CPSC says Rad Power Bikes has not agreed to a full recall and is unable to offer replacement batteries or refunds for all affected customers. As a result, the agency issued its own warning urging consumers to stop using the batteries and dispose of them properly.

Consumers are instructed to remove the batteries from their bikes, avoid using or reselling them, and dispose of them at a local household hazardous waste facility—not in regular trash or curbside recycling.