What to do if the battery capacity is reduced

After the battery is charged, the use of time is not long enough to save power, the starter rotation is weak, the engine is difficult to start, the speaker, the sound volume is reduced, the light is dim, the single cell battery is checked with a high rate discharge meter, the voltage is lower than 1.5V, that is, the battery capacity is reduced. Should first check whether the generator capacity is appropriate, whether the regulator voltage is too low, whether the battery is self-discharging due to long-term storage, whether the use of the starter is too frequent, whether the electrolyte level is too low and commonly used instead of distilled water to add the battery, if there is no such problem, the battery cover should be opened to check whether the electrolyte is missing.

If the liquid level is too low and the time is too long, the exposed part of the plate is vulcanized, then the plate should be extracted for inspection. If a layer of white lead sulfate appears on the surface of the plate, it indicates that it has been vulcanized. If the electrolyte is poured out after the plate is extracted, there is too much falling off the plate active substance or other impurities in the battery bottom shell, indicating that these substances cause short circuit between the plates, resulting in insufficient capacity.

How to diagnose the battery storage capacity decline fault storage capacity decline commonly known as "running", the main phenomenon is: the first day when the car is still enough to save electricity, the next day the starting motor rotation is weak; If the engine shuts off for a little longer, it will be difficult to start again. The lights were dim and the horn was silent.

Check whether the battery wires are connected with iron. If not, use a high rate discharge meter to check the voltage of each cell, check once an hour. If the initial voltage reaches a certain value, it decreases rapidly, and drops to 0 in serious cases, indicating that there is a short circuit fault between the plates. Open the battery cover and use a glass tube to extract the electrolyte. If the electrolyte is cloudy, it indicates that the electrolyte contains impurities. At this time, the plate should be removed and the partition board should be drawn out for observation. If the partition board is perforated, it indicates that the fault is caused by the partition board perforation.

In addition, check whether the battery surface is too dirty and whether there is electrolyte overflow.