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Hybrid Battery Test

Tesla's long running chemistry. Very high energy density, and genuinely unhappy sitting at a full charge.

At a glance

  • Energy density. the highest in common use, which is why the range figures are what they are
  • Found in. Tesla Model S and X on 18650 cells, Model 3 and Y on 2170 cells, supplied by Panasonic
  • Life. Fleet data shows most packs outlasting the vehicle around them.
  • Weakness. Prefers not to sit hot and full at the same time. Those two conditions compound rather than add.

Where you will find it

Tesla Model S and X on 18650 cells, Model 3 and Y on 2170 cells, supplied by Panasonic.

What is good about it

Most range per kilogram of any chemistry in volume production.

What is not

Cobalt content, less thermal headroom than iron phosphate, and real sensitivity to sitting near 100 percent.

How long it lasts

Fleet data shows most packs outlasting the vehicle around them.

Heat and cold

Prefers not to sit hot and full at the same time. Those two conditions compound rather than add.

Source. InsideEVs on Tesla cell chemistry. Read 16 September 2026.

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