Newer ones, maybe, but they started with 18650s.
The 85 kWh battery pack weighs 1,200 lb (540 kg)
[135][
better source needed] and contains 7,104
lithium-ion battery cells in 16 modules
[136] wired in series (14 in the flat section and two stacked on the front).
[137] Each module contains 6 groups of 74 cells
[138] wired in parallel; the 6 groups are then wired in series within the module.
[138][139][140][141] As of June 2012, the battery pack used modified
Panasonic cells with nickel-cobalt-aluminum
cathodes.
[142] Each cell was of the 18650 form factor (i.e., an 18 mm diameter, 65 mm height cylinder), similar to the Panasonic NCR18650B cell that has an energy density of 265 Wh/kg.
[143] Analysts estimate battery cost to be around 21–22% of the car cost.
[144]
Tesla Model S - Wikipedia
So a wrecking yard might be our next source...