18650

Etymology
. Named for the nominal dimensions of a fresh battery: 18 millimeter diameter by 65 millimeter length. The final 0 is common to the name of many cylindrical cell batteries.

Noun

 * 1) A cylindrical rechargeable battery cell format for lithium-ion chemistry batteries, commonly used as component batteries in battery packs for some electronics and electric cars.

Synonyms

 * 1865

Pronunciation
Pronounced as: eighteen six fifty.

Noun

 * 1)  electrochemical battery of a secondary storage cell