Txoj kev them nyiaj yog qhov tseem ceeb. Cov roj teeb lithium-ion roj teeb yuav tsum muaj lub roj teeb tshwj xeeb uas txhawb nqa lithium-ion roj teeb them hom, feem ntau qhia rau ntawm lub ntim ntim. Ntau lub chargers tau sib xws nrog ob hom kev them nyiaj; Thaum yuav khoom, them sai sai rau seb nws tsis siv neeg lees paub lossis kev teeb tsa ntawm kev hloov pauv. Yog tias yuav tsum tau teeb tsa phau ntawv, nws yuav tsum raug teeb tsa kom raug raws li hom roj teeb raug them.
Rau npib tsib xee-cadmium/nickel-hlau hydride roj teeb, cov roj teeb zoo heev siv txoj kev them nyiaj nrog rub-pulse tsis zoo, uas txo cov polarization thaum them nyiaj. Ib txwm, pheej yig chargers siv tas li tam sim no them. Lub roj teeb them waveform yuav tsum muaj oscilloscope rau kev soj ntsuam kom raug.
