The 1.5V AA Panasonic Pro Power Alkaline batteries are from the mid to high-range of primary batteries from Panasonic situated at one level below the top Evolta range of Alkaline batteries. Panasonic claims that it has improved capacity of the new Pro Power batteries so that they can offer up to 80% extra performance compared to their last years Alkaline range of batteries (the maximum difference measured between Panasonic Pro Power production 2012 and Panasonic Standard Power production 2011 by Panasonic). The 1.5V AA Panasonic Pro Power Alkaline batteries we got for testing are with an expiration date of 02-2020, so quite a long shelf life for these batteries. Panasonic says that these are ideal for high and medium drain appliances, so let us see how they perform in our tests.
The source said Tesla, which currently buys batteries from Panasonic, was likely to add Samsung SDI as a supplier for Model 3 if and when Tesla's battery plant were not able to produce enough batteries to meet demand.