The safest way to store medical instruments in your vehicle is with a car battery backup, experts say.

The National Highway Traffic Safety Administration (NHTSA) said it was aware of a new battery problem affecting many vehicles.

The NHTSA said in a statement on Monday that it has “received reports of a number of vehicles experiencing battery-related issues” and “that we are working to determine the cause of the issue.””NHTSCOM is working closely with NHTV, NHTCA, and other vehicle manufacturers to resolve the issue,” the NHTS statement said.

“NHTS urges drivers to continue to check for signs of battery issues and to avoid driving while under the influence of alcohol or drugs, especially while driving on country roads.”

The NHTS did not specify how many vehicles have been affected.

“Battery issues may affect both a vehicle’s electronic and mechanical systems, resulting in a range of effects from reduced range to loss of power, and even the inability to perform normal driving functions,” the statement said, adding that drivers should “carefully review the information on the vehicle’s safety features and equipment.”