Tesla released 2025.1 and 2025.2 updates in February that adjusted how their fleet charges. Most owners didn't notice because the changes are subtle. The underlying charge curve—the invisible algorithm that controls the amps flowing into your battery—shifted. I've had three owners call this month confused because their Model 3 was charging slower than before the update.
What actually changed in 2025.x
Tesla's charging algorithm is dynamic. With 2025.1, Tesla adjusted the temperature thresholds for when the car begins tapering the charge rate. Previously, a cold battery would start tapering at around 85°F. Now it tapers earlier, around 75-80°F, and ramps up the taper rate more aggressively.
Second, the 2025.2 update changed scheduled departure preconditioning. Previously, the car would begin heating at 6:45 AM for a 7 AM departure. Now it begins at 6:15 AM and heats more gradually.
Third—Tesla adjusted the default charge limit target. Previously it defaulted to 80%. Now it defaults to 85% for most models (except LFP batteries, which still default higher).
⚡ Field note — Ray Novelo
Had a 2023 Model Y owner frustrated because she was only getting 220 miles instead of 240 after the update. I pulled the logs—car was charging to 85% instead of 90%. Default limit had changed. She manually adjusted it back and the range issue disappeared. Tesla didn't mention this in the release notes.
How to check your software version and current charge behavior
- ✓Open Controls > Service > Additional Vehicle Information and note your software version
- ✓Navigate to Controls > Charging and check your set charge limit
- ✓Plug in at room temperature and monitor the amps over 5 minutes
- ✓Compare to your previous behavior
- ✓Check if preconditioning starts earlier than expected
Why this matters for your battery's long-term health
The changes are conservative and protective. Tesla is optimizing for longevity over convenience. Over 200,000 miles, these tweaks could mean 5-10% better battery retention. But it also means charging takes 10-15% longer in some scenarios.
⚠ Don't override without understanding the trade-off
You can manually raise the charge limit and disable scheduled departure. But you're trading battery longevity for convenience. Tesla made these changes because they work.
What to do if charging feels wrong after an update
Check your charge limit—it may have reset. Compare your charge rate to published specs. Check ambient temperature. Reboot the car (hold both scroll wheels for 10 seconds) and try again.
Charging slower than expected after an update?
We can pull your charge logs, compare pre- and post-update behavior, and tell you exactly what changed.
References & further reading
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