Lub roj teeb thib ob yog ib hom tshuaj siv hluav taws xob siv dav hauv ntiaj teb tam sim no, uas muaj qhov ruaj khov, muaj kev nyab xeeb thiab txhim khu kev qha, tus nqi qis, daim ntawv thov dav thiab ntau cov ntaub ntawv raw thiab qhov zoo ntawm cov khoom siv rov ua dua tshiab, nws yog qhov loj tshaj thiab feem ntau siv roj teeb nyob hauv lub ntiaj teb. Muaj ntau hom roj teeb theem nrab nrog kev ua haujlwm sib txawv. Raws li cov ntaub ntawv electrode, lawv tuaj yeem muab faib ua cov roj ntsha lead-acid, nickel-cadmium roj teeb, nickel-hydrogen roj teeb, lithium ion roj teeb, thiab lwm yam.
Cov roj teeb tseem ceeb me me, cov khoom siv hluav taws xob nqa tau yooj yim, xws li cov khoom siv hauv tsev, cov koob yees duab thiab lwm yam khoom siv digital, lub peev xwm dav dav yog qis dua 2Ah, yooj yim siv, tsis tas yuav them. Lub roj teeb tsuas siv tau ib zaug xwb. Thaum siv hluav taws xob, lub roj teeb raug muab pov tseg. Tus nqi siv yog qhov siab, thiab cov roj teeb pov tseg tsis tuaj yeem rov ua dua, uas yuav ua rau ib puag ncig.
