Voltage ntawm equalizing tus nqi tswj taw tes: tom qab tus nqi ncaj qha, lub roj teeb feem ntau yuav raug tso tseg rau ib lub sij hawm los ntawm tus nqi hluav taws xob tswj kom nws qhov hluav taws xob poob lawm. Thaum nws poob rau qhov "rov qab voltage" tus nqi, nws yuav nkag mus rau hauv lub xeev equalizing nqi. Vim li cas peb yuav tsum tsim ib qho nqi sib npaug? Ntawd yog, tom qab them nyiaj ncaj qha, tej zaum yuav muaj cov roj teeb ntawm tus kheej "lagging qab" (lub davhlau ya nyob twg voltage kuj tsawg). Txhawm rau rub cov tib neeg cov molecules rov qab thiab ua kom lub davhlau ya nyob twg voltage ntawm tag nrho cov roj teeb tsis sib xws thiab zoo ib yam, nws yog ib qho tsim nyog yuav tsum tau them rov qab nrog cov hluav taws xob siab thiab nruab nrab tam sim no rau lub sijhawm luv luv. Nws tuaj yeem pom tau tias qhov sib npaug ntawm kev them nyiaj tseem hu ua "kev sib npaug sib npaug". Lub sijhawm them nruab nrab yuav tsum tsis txhob ntev dhau, feem ntau los ntawm ob peb feeb mus rau ntau tshaj kaum feeb. Yog tias lub sijhawm teem sijhawm ntev heev, nws yuav ua rau muaj kev phom sij. Rau lub kaw lus me me nrog ib lossis ob lub roj teeb, txawm tias them nyiaj tsis muaj qhov tseem ceeb. Yog li ntawd, txoj kev teeb lub teeb tswj feem ntau tsis teem sib npaug, tsuas yog ob theem.