Sentry IQ / Guides / Battery drain
Tesla Sentry Mode battery drain: real numbers and how to cut it.
Updated 19 August 2026
Sentry Mode keeps the cameras and the car's computer awake while you are away. That costs real energy, and it is the number one reason owners turn the feature off. Here is what it actually costs, and how to keep the protection without paying for hours you do not need.
What Sentry Mode actually draws
- Older software: roughly 250 to 300 watts while armed. That works out to about a mile of range per hour, or 10 to 15 miles over a full day.
- Since Tesla's late-2024 update: around 150 watts on supported cars. A parked day costs many owners 4 to 8 percent of the battery instead of 7 to 14.
The exact number varies by model, climate and software version. The shape of the cost does not: it is a steady draw for every hour armed, so the total is set by how many hours you leave it on.
The 20 percent cutoff
Sentry Mode turns itself off when the battery reaches 20 percent, and the Tesla app tells you when it does. The car protects your ability to drive home over its ability to watch the parking lot. If you park somewhere risky for days, arrive with charge to spare.
How to cut the drain without going unprotected
The wrong fix is the common one: Sentry Mode off, permanently, after the first low-battery morning. The car saves a few miles a day right up until the night someone works down the row of cars on your street, and yours is the one with no film. Cut the hours, not the protection.
1. Exclude the places that do not need it
Tesla can skip Sentry Mode at Home, Work and Favorites. If your car sleeps in a garage, that is free range. The setting lives in the Sentry Mode options on the car's screen.
2. Arm it on a schedule instead of around the clock
Tesla has no built-in timer for Sentry Mode. It is on until you turn it off. But most exposure is predictable: the office lot on weekdays, the street on weekend nights. Sentry IQ lets you paint those hours on a weekly grid, and the car arms itself for them and stands down for the rest. Armed 45 hours a week instead of 168 is roughly 73 percent less Sentry drain, with protection exactly when the car is exposed. More in the scheduling guide.
3. Do not pay the drain twice
Sentry Mode without alerts costs the same energy as Sentry Mode with them. If the cameras are awake all night anyway, you may as well hear about what they see. The drain argument is a reason to schedule, not a reason to go blind.
Questions owners ask
Does Sentry Mode turn off when the battery is low?
Yes, at 20 percent, with a notification from the Tesla app. It will not arm below that level either.
How many miles per day does it really use?
Commonly 10 to 15 miles on older software, roughly half that on cars with the late-2024 efficiency update. Cold weather adds separate losses that are not Sentry's fault.
Does an alert app make the drain worse?
No. The cameras and computer draw the power either way. The events are already being generated; an app just delivers them to you.