Look up 18650 in Wiktionary, the free dictionary.
18650 may refer to:
- 18650 battery, a form factor size for rechargeable lithium-ion battery cylindrical cells
- (18650) 1998 FX10; a main-belt asteroid, Asteroid 18650, the 18650th asteroid registered
- ISO 18650, an international standard on construction
- The number 18650