Lub hwj chim tso zis ntawm ib lub xov tooj smartphone charger yog 5 txog 10W. Cov zis hluav taws xob yog 5V, thiab cov zis tam sim no yog 1 txog 2A.
Lub hwj chim ntawm lub xov tooj txawb charger yog qhov tso zis hluav taws xob x cov zis tam sim no, uas tuaj yeem pom ntawm lub npe adapter. Lub wattage ntawm lub xov tooj ntawm tes charger feem ntau yog hais txog qhov tso zis, thiab cov zis wattage=tso zis voltage x tso zis tam sim no.
Cov zis kawg feem ntau pib ntawm 5V, 800mA (0.8A) lossis 5V, 1A, uas yog tus qauv USB2.0 voltage thiab cov zis tam sim no.
Tus naj npawb ntawm lub zog yog lub zog. Raws li cov qauv P=U·I, nws tuaj yeem suav tias lub zog yog 5Vx1A=5W.