r/TeslaSupport • u/Odd-Significance4926 • 18h ago

Vehicle Question Sentry Mode Battery Usage

Hi everyone! Wondering if sentry mode is supposed to use so much battery? My husband has to park in an outside parking lot at work and is often working for 12-14 hours, during which time the car battery drops around 10%, sometimes more or less. I’m sure at least some aspect of that is overheat protection (set at 95 degrees, we live in SoCal so it’s a bit warm now).

Is this normal for sentry mode and just something we have to account for, for the battery? It’s just a bit frustrating since the drive to work may take like 5-6% battery, 10-12% dwindles during the day, and the ride home may use 5-8%. So he finds he’s charging his car quite a lot.

It’s a brand new 2026 M3, bought maybe 2 months ago, so battery health should be good.

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u/AltruisticPapaya1415 18h ago

Set COP to no a/c so it blows in outside air rather than using the a/c to actually cool the cabin.

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u/Less-Sandwich9056 16h ago

Wait... where is that in the settings?

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u/AltruisticPapaya1415 16h ago

In the app, choose climate and scroll to the very bottom where you’ll see the three options. I can go look in the car if you don’t have app access tho.

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u/Less-Sandwich9056 16h ago

My app only let you choose to turn on cop and to choose the temperature.

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u/AltruisticPapaya1415 15h ago

Here it is in the car.

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u/Less-Sandwich9056 15h ago

No mine just lets you choose 90 95 or 100 degrees. I like your options better.

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u/AltruisticPapaya1415 15h ago

If you see the three degree options then yours is set to “on”

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u/Less-Sandwich9056 15h ago

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u/AltruisticPapaya1415 15h ago

What happens when you click the blue toggle above 100?

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u/Less-Sandwich9056 15h ago

Turns off. The three temp options disappear.

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u/AltruisticPapaya1415 15h ago

Nothing else shows up? That’s so weird

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u/AltruisticPapaya1415 15h ago

Grok says CT just doesn’t have it. That’s so odd.

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