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Please explain... What is Max Battery?

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My very rudimentary understanding is that it preheats your battery to perform at optimum levels to provide the best acceleration.

I'm sure someone else on here can provide a dissertation level explanation if that is what you are seeking.

Hope that helps.

Jason
 
Page 108 of the Owner's Manual........
https://www.tesla.com/sites/default/files/model_x_owners_manual_north_america_en.pdf

Acceleration (Performance dual-motor vehicles only) Choose an acceleration level. Sport is the standard level of acceleration and allows you to maximize driving range. Choose Insane to increase peak torque by approximately 30 percent and Ludicrous to increase it by approximately 60%. If you choose Insane or Ludicrous, additional power is available immediately. However, to achieve the absolute maximum power (designed for short term use), touch Max Battery Power, which displays as blue text immediately below the acceleration setting. Max Battery Power heats the Battery to its ideal operating temperature to ensure access to 100% of available power. Heating the Battery can take over an hour, depending on environmental conditions and whether or not Model X is being driven. During this time, a message displays providing you with an approximate wait time. When the additional power is available, the message indicates that Max Battery Power is READY! When using Max Battery Power, Model X consumes more energy as it keeps the Battery within an optimal temperature range. To cancel Max Battery Power at any time, change the acceleration level to Sport (or touch the button in the Max Battery Mode popup). To prevent excess and potentially unnecessary energy consumption (for example, you leave the vehicle and forget to cancel Max Battery Power), Max Battery Power cancels automatically in three hours, regardless of whether you are still driving or have left the vehicle. Note: To support Max Battery Power, the charge level must be 20% or higher. You cannot initiate Max Battery Power if the charge level is less than 20%. In addition, Max Battery Power immediately cancels if at any time during its use, the charge level drops below 20%. Note: Max Battery Power strives to keep the pack within an optimal temperature range. In addition to heating the Battery, Max Battery Power also cools the battery when necessary (for example, during aggressive driving scenarios). Note: Max Battery Power is designed to achieve maximum performance for short term acceleration and is not intended for daily driving. The tradeoff for the additional power boost is extra energy consumption and earlier power fade on long aggressive drives. The Insane or Ludicrous acceleration settings provide a significant increase in performance even without Max Battery Power. In fact, in normal driving situations, the additional power that can be achieved using Max Battery Power may not be noticeable.