There is a special battery measuring instrument for the quality of the battery, but the average user rarely has this instrument, and there is only one multimeter. The following points in the repair of the identification of the quality of the battery is summarized for reference.

1, judging from the appearance: Observe whether the appearance is deformed, protruding, leaking, cracking and blasting, burning, and whether there is oxide seepage at the screw connection.

2, with load measurement: if the appearance is not abnormal, the UPS works in the form of a battery, with a certain amount of load, if the discharge time is significantly shorter than the normal discharge time, after 8 hours of charging, it can not recover the normal standby time, determine the battery aging.

3. Measure with a multimeter:

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A, Vada battery discharge form measurement: measurement of the battery pack in each battery terminal voltage, if one or more of the battery terminal voltage is clearly higher or lower than the nominal voltage (nominal voltage 12V/ section), to identify battery aging.

B. Measurement in the form of mains: the charging voltage of each battery in the battery pack, if the charging voltage of one or more batteries is significantly higher or lower than other voltages, determine the aging of the battery.

C, measure the total voltage of the battery pack: the total voltage of the battery pack is significantly lower than the nominal value (take the nominal value of the C1K battery pack is 36V as an example), after 8 hours of charging, it can not recover to the normal value, even if the recovery to the normal value, discharge can not reach the normal discharge, determine the battery aging.

D, battery boot measurement: UPS does not turn on, do not connect to the mains, first use a multimeter to measure the total voltage of the battery pack, take C1K as an example, the voltage may be between 36V-40V at this moment, return to the normal value, do not leave the pen, always stare at the instructions of the multimeter, and then connect the power button, if the total battery voltage immediately drops to 30V or even more than ten volts, the UPS will automatically shut down immediately. The voltage recovers to the original value immediately after shutdown. Determine the aging of Viada battery.