因(yin)電(dian)(dian)(dian)池放(fang)電(dian)(dian)(dian)時(shi)(shi)間(jian)與(yu)放(fang)電(dian)(dian)(dian)電(dian)(dian)(dian)流、環境溫度、負載類(lei)型、放(fang)電(dian)(dian)(dian)速率(lv)、電(dian)(dian)(dian)池容量等多因(yin)素相關，故實(shi)際放(fang)電(dian)(dian)(dian)時(shi)(shi)間(jian)無法(fa)直(zhi)接用公式推導出。

現提(ti)供電(dian)池大放電(dian)電(dian)流(liu)公式：I=（P*cosφ）/（η*Ei）其中P是UPS的標稱輸(shu)出功率;cosφ是負載功率因數，PC、服務器一般取0.6~0.7;η是(shi)逆變器的效(xiao)率(lv),一般也取0.8(例(li)如華為UPS5000效率高達96%);Ei是電(dian)池放電(dian)終了(le)電(dian)壓，一般(ban)指電(dian)池組的電(dian)壓。

蓄電(dian)(dian)(dian)(dian)池組在使用期間，放完電(dian)(dian)(dian)(dian)應及時充(chong)電(dian)(dian)(dian)(dian)，另外(wai)如(ru)果長期不停電(dian)(dian)(dian)(dian)，每三個月應人為斷掉市電(dian)(dian)(dian)(dian)用電(dian)(dian)(dian)(dian)池放電(dian)(dian)(dian)(dian)帶設備工作，這樣可以擊活(huo)蓄電(dian)(dian)(dian)(dian)池延長其使用壽命。