内阻过大一电蓄电池使用时间过久或导致活性下降、内阻过大，表明该一电 蓄电池需要更换！
(1)、随UPS电源使用时间的延长，总有部分一电 蓄电池的充放电特性会逐渐变坏，端电压明显下降，这种一电 蓄电池的性能不可能再依靠UPS电源内部的充电电路来解决，继续使用会存在隐患，应及时更换。
(2)、对于一电 蓄电池内阻增大，用正常的充电电压对一电 蓄电池进行充电已不能使一电 蓄电池恢复其充电特性的一电 蓄电池应及时更换。一电 蓄电池的内阻一般在10～30mΩ，如一电 蓄电池的内阻超过200mΩ上，将不足以维持UPS的正常运行，对内阻偏大的一电 蓄电池必须更换。
If the internal resistance is too large, the battery will be used for too long, or the activity will be reduced, or the internal resistance will be too large, indicating that the battery needs to be replaced!
(1) with the extension of UPS power supply use time, the charging and discharging characteristics of some primary batteries will gradually deteriorate, and the terminal voltage will obviously drop. The performance of this primary battery can no longer be solved by the internal charging circuit of UPS power supply, and there will be hidden dangers in the continuous use, so it should be replaced in time.
(2) if the internal resistance of the primary battery increases, the primary battery whose charging characteristics cannot be restored by charging the primary battery with normal charging voltage shall be replaced in time. The internal resistance of primary battery is generally 10-30m Ω. If the internal resistance of primary battery exceeds 200m Ω, it will not be enough to maintain the normal operation of ups. The primary battery with large internal resistance must be replaced.
