Last Updated: February 17, 2026
🔋 Your Tesla’s battery is its most important asset – but is it degrading faster than expected? Tesla’s official app doesn’t give you much detail, but that’s where the Tessie app comes in.
👉 Get started with Tessie and track your Tesla’s battery health
Why Tesla Battery Health Matters
Tesla owners often worry about how much capacity they’ll lose over time. Even a small drop in usable range can feel significant, especially if you plan to keep your car for years or sell it on the used market.
Tessie gives you clear, visual data showing exactly how much range your battery has lost and how that compares to other Tesla owners worldwide.
What Tessie Gives You:
🔋 Battery Health & Degradation Tracking
Tessie lets you see your battery's health at a glance. It tracks your Tesla's battery degradation by comparing its current capacity versus the average capacity for other Teslas with similar mileage and age.
You’ll also get an estimated percentage of degradation so you can see exactly how your battery is performing relative to the fleet.
📊 Charge Cycles & Energy Usage
With Tessie, you can monitor how many full charge cycles your battery has been through and see your total energy used. This is invaluable for working out how much wear and tear your battery is under.
📏 Max Range & Capacity Analysis
Tessie estimates your maximum range and plots it on a graph over time. This allows you to easily identify when the range is decreasing, a vital insight for Tesla owners who plan to keep their cars long-term.
⚡ Detailed Battery Statistics
Get all the numbers at your fingertips – voltage, temperature, amperage, drain, and energy consumed. Everything is displayed in a clean dashboard that updates in real time.
📉 Comparisons vs. Fleet Average
You can also compare your Tesla’s data to other owners with the same model, year, and battery size. Tessie makes it easy to spot if your degradation is faster than normal.
🕵️♂️ Invisible Background Logging
Tessie integrates with your Tesla’s official API – so there's nothing to install. It quietly collects all the data you need in the background, allowing you to review your battery stats anytime, anywhere.wn into easy-to-understand charts with accurate estimates of your battery's long-term health.
Why Tesla Doesn’t Give You This Info
Tesla's official app only provides basic statistics, such as mileage and charging rate. That’s fine for most people, but when you want to dive deeper – like seeing the projected lifespan of your battery – it’s lacking.
Tessie bridges that gap. It uses Tesla’s own secure API to access data about your car that Tesla doesn’t surface in their app.
How Battery Health Affects Range and Resale Value
By monitoring your Tesla's battery health regularly with Tessie, you can:
- 🔍 See early signs of rapid degradation so you can take action (e.g. charging habits)
- 📉 Keep accurate logs for resale – proven battery health could boost your car's value
- ⚡ Spot phantom drain or other power losses that might reduce your range
- 📈 Estimate how much you’ll lose in the next 12-24 months so you can plan ahead
Getting Started with Tessie
Tessie is simple to set up, connect your Tesla account securely, and it’ll do the rest. You can also:
- 🎯 Track charge sessions and costs
- 📊 Automate trip logging
- 🚀 Set up useful notifications (e.g. when it’s fully charged or when it reaches a target level)
- 🕰 Get historical data going back to your first drive
And the best part? You can try Tessie for free.
👉 Use my link to get a trial of Tessie and unlock all its pro features
💡 Why I Track My Model 3's Battery Health Every Month
When I bought my Tesla Model 3 Long Range via Cinch in April 2026, it had already covered 44,000 miles. Battery degradation tracking was a priority from day one – and Tessie is how I do it. I can see exactly how my battery compares to other Model 3 owners with similar mileage and age, and whether my charging habits are affecting long-term health. I'm now at around 59,500 miles, so having that historical data from first use is invaluable for keeping an eye on the battery's trajectory before it gets to resale.
Steven | Tesla Model 3 LR owner, Cornwall
Conclusion: Donu2019t Let Battery Health Be a Mystery
Your Tesla is a big investment, and knowing the real status of your battery can help you look after it properly and maintain its value.
With Tessie, you finally get the full picture so you can drive with confidence.
🔗 Related Reads
- TeslaFi Review UK – The Tesla Tracking App That Goes Beyond Tesla’s Official App
- Why Every Tesla Owner Should Try Tessie’s Automations
- Octopus Intelligent Go Tariff – Charge Overnight at 7p/kWh
I’m Steven, founder of MoneyAppReviews. I test money apps, referral programs, and EV tools in real life before I write about them. I drive a 2021 Tesla Model 3 Long Range, use Octopus Intelligent Go for home charging, and regularly track costs, savings, and app performance over time. I focus on practical, evidence-based reviews that help people decide what is actually worth using, not just what pays the highest commission.