Ibhethri le-18650 wuhlobo lwebhethri elishajekayo ion elinosayizi ojwayelekile ongu-18mm ngo-65mm. Ivamise ukusetshenziswa ezintweni eziningi zikagesi ezifana namalaptop, amathoshi, nezimoto zikagesi. Ibhethri le-18650 linomthamo omkhulu wamandla futhi lingagcina inani elikhulu lamandla ngosayizi omncane, okwenza kube ukukhetha okudumile kumadivayisi aphathwayo. Yaziwa nangempilo yayo yomjikelezo omude, okusho ukuthi ingashajwa futhi ikhishwe kaningi ngaphambi kokuthi ishintshwe. Kodwa-ke, kubalulekile ukuqaphela ukuthi ibhethri le-18650 kufanele lisetshenziswe ngokucophelela futhi liphathwe kahle ukugwema izingozi zokuphepha ezifana nokuqhuma nomlilo.

Ibhethri le-18650 yibhethri ye-lithium-ion eyicylindrical enobubanzi obungu-18mm nobude obungu-65mm. Yethulwa okokuqala ngabakwaSony ngo-1991 futhi selokhu yaba ngelinye lamabhethri aphinde ashajwe asetshenziswa kakhulu ezintweni eziningi zikagesi, okuhlanganisa amalaptop, amathuluzi kagesi, nezimoto zikagesi. Uma kuqhathaniswa nezinye izinhlobo zamabhethri, ibhethri le-18650 linomthamo omkhulu wamandla, impilo yomjikelezo omude, nokusebenza okungcono emazingeni okushisa abandayo. Yaziwa futhi nekhono layo lokuletha amaza okukhipha aphezulu, okwenza kube ukukhetha okudumile kwezinhlelo zokusebenza ezidinga ukuphuma kwamandla aphezulu. Kodwa-ke, kubalulekile ukuphatha ibhethri le-18650 ngendlela efanele futhi ugweme ukushajwa ngokweqile noma ukushisa ngokweqile, njengoba lokhu kungabangela izingozi zokuphepha.