Card coverage tends to be secondary, meaning that if the renter has any other applicable insurance it must be tapped first to pay for damages, with the card picking up deductibles and extras like towing.

FORBES: This Week in Credit Card News

A. In addition to the coverage provided under the existing Nissan New Electric Vehicle Limited Warranty, this expanded warranty applicable to LEAF vehicles in the United States will protect against capacity loss in LEAF batteries that falls below nine bars, of the available 12 bars displayed on the vehicle's battery capacity gauge, for the first 5 years or 60, 000 miles, whichever comes first.

ENGADGET: Nissan upgrades US Leaf warranties, will 'restore' batteries that lose too much charge