You may have an accessory to track your car accident, but it won’t give you accurate data on how much damage it caused

When the car you’re riding in is totaled and you need to find out how much it cost, you’re not going to be able to figure out the total damage until you’ve recovered the vehicle, according to a recent study.

The study by the National Automobile Dealers Association, which polled more than 3,000 car owners in January and February about how they tracked their vehicles after accidents, found that the devices they relied on were not good enough to give accurate data, according the Associated Press.

“Most of them [batteries] are too short and too expensive to be of use,” the study said.

“When you have a car that’s totaled, and you don’t know how much is in it, and it’s in your pocket and you’ve got a phone in your hand, you can’t do a good job of assessing the damage to the vehicle,” said John Pugh, the association’s executive director.

“It’s going to take time for us to get it right.”

The researchers surveyed more than 300 drivers of 2014 Lexus and Acura Lexus SUVs and a Lexus GS sedan, as well as a Mazda 3 and a Nissan Altima.

They asked the drivers how many battery charges they had, and how long it took to recharge them.

When they were done, they could tell how much they had spent on repairs, which they then compared with the damage caused.

The report found that of those who reported a car accident and how much money they spent on repairing it, only 18 percent of those drivers said the repair was worth it, compared with 56 percent of drivers who didn’t have a vehicle accident.

“This is not surprising, because the cost of repair is a factor in many of the costs associated with vehicle accidents,” said Dr. David St. Clair, a car-damage expert with the Association of American Carriers, in a statement.

“There is no guarantee that these batteries will last as long as they are supposed to, or that they will work as well or as safely as they should,” St. Claire said.

But, he said, that doesn’t mean they won’t be valuable.

“If you’re going to replace them with another type of battery, the costs are going to go down,” he said.

The National Automotive Dealers Assn.

said the study showed that batteries used in the car can’t be relied on to track their usage over a long period of time, and that battery replacements should be done when a vehicle is totaled.

“The batteries in these devices are designed to last for a long time,” said Chris Miller, director of product marketing and marketing services at the association.

“The manufacturer has to be very careful about how much longer these devices can be used.”

Follow Kelly Johnson at on Twitter.