A cylindrical [18650 lithium-ion cell](/entry/tc-ec-cell-18650) without the casing on, showing the [jelly roll](/entry/tc-cell-jellyroll) inside.

Image

18650 cell disassembled

{ this.get(prop=prop("license-family")).first().description }

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The jelly roll or Swiss roll design is the design used in the majority of cylindrical rechargeable batteries,  including nickel–cadmium (Ni-Cd), nickel-metal hydride (Ni-MH), and lithium-ion (Li-ion).  The design has this name because the cross section of the battery looks like a Swiss roll ^[from Wikipedia, ["Jelly roll"](https://en.wikipedia.org/wiki/Jelly_roll_(battery))].

Jelly roll

An 18650 cell is a standard format [cylindrical lithium-ion](/entry/tc-ec-cell-li-cyl)
[cell](/entry/tc-ec-cell-s), with a diameter of {this.get(prop=prop("diameter"))}
and a length of {this.get(prop=prop("length"))} (slightly larger than a
[AA battery](/entry/tc-batt-aa)).
The 18650 cell has been used since the late 1990s and has been popular for a wide range of applications that
require a rechargeable battery - such as flashlights, laptops, power tools, and even electric vehicles. Due
to the popularity of the 18650 cell, they are usually an easily available, well-understood, and affordable
option.

18650 cell

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Description	A cylindrical 18650 lithium-ion cell without the casing on, showing the jelly roll inside.
Creator	Rudolf Simon
Relates to	TC18650 cell, TCJelly roll
Source	Wikimedia Commons
License	Creative Commons Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)