Ibhethri elijwayelekile elingu-3.7V noma i-4.2V liyafana. Ukuthi nje ilebula lomkhiqizi lihlukile. I-3.7V ibhekisela kuvoltheji yesikhulumi (okungukuthi i-voltage evamile) ekhishwa phakathi nebhethri, kuyilapho i-4.2V ibhekisela kugesi lapho ibhethri selishajwe ngokugcwele. Amabhethri e-lithium ajwayelekile ashajwa kabusha angu-18650, i-voltage indinganiso engu-3.6 noma i-3.7v, uma ishajwe ngokugcwele ingu-4.2v, lokhu akuhlangene kangako namandla (umthamo), umthamo ojwayelekile wamabhethri angu-18650 ukusuka ku-1800mAh kuya ku-2600mAh, (umthamo webhethri wamandla angu-18650 Ikakhulukazi i-2200~2600mAh), umthamo ojwayelekile uze ube no-3500 ojwayelekile noma u-4000mAh noma ngaphezulu.

Ngokuvamile kunenkolelo yokuthi uma i-voltage engekho yomthwalo webhethri ye-lithium ingaphansi kuka-3.0V, ibhekwa njengephelile (inani elithile lincike embundwini webhodi lokuvikela ibhethri, eliphansi njenge-2.8V kanye ne-3.2 V). Amabhethri amaningi e-lithium awakwazi ukushajwa nge-voltage engekho ngaphansi kwe-3.2V, ngaphandle kwalokho ukukhipha ngokweqile kuzolimaza ibhethri (ngokuvamile, amabhethri e-lithium emakethe asetshenziswa ngokuyisisekelo nebhodi elivikelayo, ngakho-ke ukukhishwa ngokweqile kuzophinde kubangele ukuthi ibhodi lokuvikela lihluleke. ukubona Ibhethri, ngaleyo ndlela ayikwazi ukushaja ibhethri). I-4.2V iyi-voltage ewumkhawulo omkhulu wokushajwa kwebhethri. Ngokuvamile kubhekwa ukuthi ibhethri lishajwe ngokugcwele lapho i-voltage engekho yomthwalo webhethri ye-lithium ishajwa ku-4.2V. Phakathi nenqubo yokushaja ibhethri, i-voltage yebhethri ikhuphuka kancane kancane isuka ku-3.7V iye ku-4.2V, futhi ibhethri ye-lithium ayikwazi ukushajwa. Shaja i-voltage engekho ngaphezu kuka-4.2V, ngaphandle kwalokho izolimaza ibhethri. Lesi isici esikhethekile samabhethri e-lithium.