Tesla has renewed an agreement with Panasonic to provide batteries for its electric vehicles.
The deal will help the Palo Alto-based electric car-maker meet an increased demand for its cars.
The new agreement will provide Tesla with lithium-ion batteries for the production of about 80,000 cars over the next four years.
The batteries will be made using Panasonic's nickel-type cathode technology.
Tesla has 6,000 orders for its Model S EV for 2012.
