General Motors is running a Ford and BYD play for cheaper batteries. That means a Silverado EV with 350 miles of range for $6,000 less.

The situation is even worse in the electric vehicle arena. Prices are going down as batteries get cheaper, but they're still about $59,000 on average in the United States.

To help our members make a smart decision about replacing their car battery, Consumer Reports tests more than 100 individual car batteries in our lab every year. And not just once—in fact ...