The low voltage lithium battery module replaces the 12V lead-acid battery used in earlier Tesla vehicles. The lithium module battery powers essential systems such as the door locks, LTE and Bluetooth modems when the Tesla Model Y is parked, enters sleep mode. The lithium battery module provides the initial power to boot up the Tesla Model Y's computer systems. This is a smaller amp-hour (Ah) capacity battery than the older lead-acid battery and should not be tapped to power any accessories. When the Tesla Model Y is powered the accessory power system (APS) draws power from the high voltage battery, steps this down to low voltage. The APS is capable of providing up to 2 kW of power for the low voltage systems. This includes the low voltage accessory ports located in the center console and rear hatch. The maximum amperage rating for the accessory outlets is 12 amps continuous, 16 amps peak.