The current 12V lead-acid battery does not always fail quickly. There are many variables that determine the life of the battery including temperature, vibration and load. Tesla has revised the 12V charging parameters multiple times since the Tesla Model S was first introduced. The latest 12V charging programming may help prolong the life of the current 12V battery by not overcharging the battery. Tesla could have used a larger capacity 12V lead-acid battery that would last longer but at higher cost, space and weight. The LFP battery has the advantage in terms of size and weight. It is unknown how well the LFP 12V battery will perform in cold weather and if the life of the LFP 12V battery will be reduced in hot climates.