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Your next electric car might be fueled up by drone. Amazon was granted a new patent earlier this month that was only recently spotted by Green Tech Media. The patent explains how Amazon drones might one day latch onto an electric vehicle and charge it while it's driving -- a complicated balancing act between the car and the drone. SEE ALSO: Amazon's new Echo Spot is here to replace your alarm clock The drones could be fully autonomous, the patent claims, meaning that they would be able to plan and navigate their own routes without any human assistance. Here's how it would work: An electric vehicle would send a request for fuel on a network to which the drones are connected.