Summary of "Electric Cars Lose Range Every Day! My Tesla Model S 4 Year Battery Capacity Update"

Overview — What the video covers

A four‑year (~57–60k mile) capacity check of the creator’s 2022 Tesla Model S Plaid (tri‑motor).
Explanation of why EV batteries lose usable range over time (capacity fade / degradation) and the factors that influence it: cell chemistry, temperature, state‑of‑charge (SOC) habits, and usage profile.
Comparison of two test methods: a manual full charge → drive to vehicle shut‑off (100% → “dead”) discharge test, and Tesla’s built‑in “Battery Health” factory test.

Key results

Manual full‑discharge test and Tesla’s factory test gave consistent results: the pack has lost roughly 13% usable capacity in ~4 years (~57–60k miles).

Usable capacity measured by the manual 100% → shut‑off test: 86.3 kWh delivered before shutdown.
Tesla’s built‑in Battery Health test: 87% SOH (state‑of‑health).
Baseline “as‑new” usable capacity used for comparison: 99 kWh.
Implied degradation: ~13% over ~4 years.
Practical effect: realistic highway range dropped to roughly 200 miles (versus 300+ miles when new), increasing the need for more frequent supercharging on routine 200‑mile round trips.

Test methodology (recommended approach)

Warm the battery: supercharge and let it sit so the pack top‑calibrates and cells can deliver maximum usable energy.
Charge to 100% and ensure the topping process completes.
Drive a representative discharge profile — the video targeted 60–80 mph highway driving to match earlier baseline tests.
Drive until the vehicle shuts off; record the total kWh used from car readouts or Scan My Tesla.
Run Tesla’s built‑in Battery Health test afterward (note: this requires >0% SOC and an AC connection) to confirm results.

The creator emphasizes the full 100%→dead test as the most user‑accessible and comparable method to measure pack SOH over time.

Technical analysis — causes of degradation

Cell chemistry:
- This Model S uses high‑nickel NCA (2170) cells. Owner and fleet anecdotes suggest these show worse durability than some NCM chemistries (and 4680 NCM cells used in other vehicles).
- Example comparison cited: a Cybertruck with 4680 NCM cells showed ~6% loss in 26k miles (anecdotal).
Worst stresses for cells:
- High SOC (sitting at 100%) combined with high temperature — calendar aging (time at elevated SOC/temperature) is a major contributor.
Usage profile:
- The car was mostly stored at ~25–50% SOC (good for calendar life) but used as a road‑trip car with lots of DC fast charging and occasional track/performance use — a mix of stressors.
Battery management and pack balancing:
- Tesla packs appear to include a buffer below displayed 0% SOC; the owner observed multiple kWh (5+ kWh) available below 0% before shutdown.
- Keeping a car at low SOC constantly can hinder pack balancing; an occasional rest at >75% SOC for a day helps the BMS “bleed” and balance cells.
Physical failure modes (high level):
- SEI growth, lithium loss to electrolyte, dendrite formation, cathode cracking — typically accelerated by heat and high SOC.

Practical observations & owner recommendations

Avoid regularly holding the pack at 100% or storing/parking in hot conditions.
For long‑term calendar life, store at mid SOC (~25–50%).
Occasionally charge above ~75% and leave it for a day to allow the BMS to balance cells.
Mixed charging patterns (AC + DC fast) are probably acceptable; fleet data doesn’t clearly show DC fast charging alone as the primary cause of accelerated degradation.
If range is critical, consider more efficient wheel/tire combinations — owner swapped to lightweight Martian MW5 wheels but lost aerodynamic efficiency compared to original aero wheels.
For repeatable SOH tracking, use the same full‑discharge protocol at purchase and at regular intervals, and cross‑check with Tesla’s Battery Health test where available.

Product reviews & gear used in the video

MSI EV Premium Charger (sponsor)
- NEMA 14‑50 style plug, 40 A / 9.6 kW @ 240 V.
- 24.5 ft flexible cable, native J1772 connector.
- Features: plug‑and‑charge / access control, Wi‑Fi (or wired LAN), app telemetry (voltage/current/scheduling), rated for wide temperature ranges, 5‑year warranty.
- Owner permanently mounted it in the garage for reliability and convenience.
Portable backup power:
- EcoFlow portable battery (approx. 6 kWh).
- Additional small power bank (Bluetti / “Blue Eddie”, approx. 2 kWh) used as emergency AC charging for roadside recovery when the car was run to dead.
Scan My Tesla app:
- Used to monitor battery temperature, cell voltages, and BMS data during the test.

Discussion points / proposed community actions

Creator proposes a “Tesla Battery Health Test Month”: a crowdsourced data collection where viewers submit Tesla Battery Health test results, usage profiles, and charging habits to build a broader picture of real‑world pack aging.
Note: there is no universal industry standard for SOH reporting — manufacturers use different metrics (usable SOC display vs full pack capacity vs impedance checks), so standardization is a challenge.

Miscellaneous

Owner notes long‑term ownership issues with this specific Model S (rattles, service regressions) and remarks on resale value versus original purchase price.
Comparisons given:
- Earlier Model 3 (owner’s 2019): ~10–11% loss over 100k miles (per owner’s prior video).
- Cybertruck (4680 NCM, anecdotal): ~6% loss in 26k miles.

Main speakers / sources

Out of Spec Reviews (video host; primary voice and tester)
MSI (charger sponsor / product provider)
Ayana (sponsorship mention: charging network)
Scan My Tesla (app used for logging)
EcoFlow / Bluetti (portable batteries used for roadside recovery)
Out of Spec testing channel staff (Wes) and community contributors/viewers (for proposed crowd testing)

Creator note

The creator offered to extract the precise test numbers and telemetry timeline (SOC vs kWh used, temperatures) into a compact table or produce a short checklist to run the same test on your own EV.