EV Battery Lifespan: What 22,700 Real Cars Say About How Long Packs Last

Your EV battery will probably outlast your ownership of the car. Geotab's 2026 analysis of 22,700 electric vehicles across 21 models found that batteries lose about 2.3% of their capacity per year — which projects to 81.6% of original capacity after eight years, and roughly 13 years before a pack reaches the 70% threshold most warranties use. The failure people fear, a battery that suddenly dies, is rare. What actually happens is slow, predictable fade.

What 22,700 real cars show

Geotab has tracked EV battery health using vehicle telematics since 2020, and each round of the study has grown larger. The headline numbers, from Geotab's own battery-health report:

Average loss: 2.3% of capacity per year. At that rate the average pack holds 81.6% of its original capacity after eight years (Geotab's own projection), and reaches the 70% warranty threshold after about 13 years.

The rate got better, then rose again. Geotab's 2020 study found 2.3% a year; by 2023, an 11-model analysis showed 1.8%, which the company credited to better battery technology and thermal management. The expanded 2025 analysis returned to 2.3% across 21 models — not because batteries got worse, but because high-power fast charging became far more common in the fleet.

Replacements are rare. A 2023 Recurrent study of 15,000 EVs found that, outside of a couple of manufacturer recalls, only about 1.5% ever needed a full battery replacement — and most cars at around 100,000 miles still had roughly 90% of their original range (via Plug In America).

Single-brand data agrees. Tesla's published fleet figures show Model 3 and Model Y Long Range packs losing on average about 15% of capacity at 200,000 miles (summarized by Rangebench).

The U.S. Department of Energy's own modeling, widely cited in industry coverage, lands in the same zone: roughly 12–15 years in moderate climates.

The warranty is a floor, not a forecast

U.S. federal rules require a minimum battery warranty of 8 years or 100,000 miles, and most manufacturers guarantee at least 70% capacity retention over that period — drop below 70% and the warranty covers repair or replacement (EVADC 2026 used-EV buyer's guide).

Two things owners get wrong about that number. First, normal gradual degradation is not a defect; the warranty protects against excessive loss and faults, not expected fade. Second, the warranty is a minimum guarantee, not a prediction. At the fleet-average 2.3% a year, a pack reaches 70% after about 13 years — roughly five years after the warranty expires.

Three things decide how your pack ages

1. Charging power — the biggest lever. Geotab found that heavy use of high-power DC fast charging (above 100 kW) pushes degradation to about 3.0% a year, roughly double the ~1.5% for cars that mostly charge on AC or lower-power DC. As a rough projection: at 1.5% a year a pack reaches 70% after about 20 years; at 3.0%, after about 10. Occasional fast charging on road trips barely registers — it is habitual high-power charging that moves the needle.

2. Heat. Vehicles spending more than 35% of their days above 25°C (77°F) degraded about 0.4 percentage points a year faster than those in mild climates. A moderate effect, but real.

3. Time parked at extreme charge. Degradation only accelerated when vehicles spent more than 80% of their total time near-full or nearly empty. Below that threshold, Geotab found essentially no difference (1.4% vs 1.5% a year) — so daily fretting over the 20–80% rule is, for most drivers, wasted worry.

What 70% capacity actually means behind the wheel

Take a car rated at 300 miles new. At 80% battery health it delivers about 240 miles; at 70%, about 210. For typical daily driving — well under 50 miles — neither number changes anything. The 70% threshold matters mostly for resale value and long road trips, not for getting to work.

One more thing the data corrects: degradation is front-loaded. A new pack loses a few percent early as the cells form a stable internal layer, then the curve flattens. A 3% drop in year one is not the start of a straight line to 30% at year ten — it is the steep part of a curve about to level off.

When to actually worry

Sudden, sharp range loss is not normal aging — it usually signals a specific fault such as a failed module or a coolant problem, and those tend to appear early in a car's life, inside warranty. Gradual fade of a few percent a year is the healthy pattern.

A note on chemistry: lithium-iron-phosphate (LFP) packs are widely reported to degrade more slowly than nickel-based chemistries, though Geotab's study did not break its results out by chemistry, so treat brand-level claims with care. If you are buying used, ask for a battery state-of-health report and check how much warranty remains — many EV battery warranties transfer to the next owner.

When the pack is truly done

Even a pack retired from a car is not finished. It typically gets a second life as stationary energy storage — backing up solar installations or stabilizing grids — for years before its materials are worth recovering. We traced that full end-of-life chain, from automaker take-back programs to second-life storage to mineral recovery, in EV Battery Recycling: What Happens to Your Battery After the Car Is Done With It.

The short version: buy the EV for the driving, charge mostly at home on AC, and let the battery fade at its own unhurried pace. The data says it will be fine long after the payments end.

Sources

• • Geotab, "EV Battery Health: Key Findings from 22,700 Vehicle Data Analysis" — geotab.com
• • Geotab press release, January 2026, on fast charging and degradation — geotab.com
• • Plug In America, "How do EV warranties compare with gas car warranties?" (cites Recurrent's 2023 study of 15,000 EVs) — pluginamerica.org
• • Rangebench, "How Long Do EV Batteries Last? What the Fleet Data Shows" (summarizes Tesla Impact Report fleet figures) — rangebench.com
• • Electric Vehicle Association of Greater Washington DC, 2026 Used EV Buyer's Guide (U.S. 8-year/100,000-mile federal warranty minimum) — soheva.net (PDF)