With small bulk

voltage stabilization

without pollution

weight light

discharge capability high and maintenance quantity light characteristics

VRLA becomes the first selection in communication power supply since ninety era. but in fact

due to the VRLA’s capability abnormality drop

that brings direct current halt

and solicitation communicate suffocate accident sometimes. how to reliably maintenance the VRLA

insure equipment use longevity and ensure communication safety

become a mostly problem at currently. The thesis discuss the mostly factor that affect VRLA’s capability and longevity from VRLA’s philosophy

and elaborate how to maintenance VRLA’s capability well from normative maintenance

to insure ’communication power supply no interruption.