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Ruiyu Company and Nanshahe Town Government signed a letter of responsibility for soil pollution prevention and control

What we usually call "maintenance-free battery" is not really "maintenance-free", but that this kind of battery does not need to be taken out for charging under normal conditions. The maintenance-free battery on some cars is also equipped with a temperature-compensated hydrometer, which can indicate the storage state of the battery and the height of the electrolyte level. When the indicator eye of the hydrometer is green, it indicates that the battery is fully charged and the battery is normal; when the indicator eye has few green dots or is black, it indicates that the battery needs to be charged; when the indicator eye is light yellow, it indicates that the battery is faulty and needs to be repaired or replace it. 
The specific gravity of the electrolyte drops below 1.200; the discharge exceeds 25% in winter; the discharge exceeds 50% in summer; the light is dim;
Some people think that fast charging can save time, it only takes 3-5 hours. In fact, fast charging just quickly activates the surface of the battery, but in fact the interior of the battery is not fully charged.
In addition to fast charging, there is also a slow charging. The charging time is 10-15 hours. Those batteries with deep losses must be charged slowly, otherwise the charging time is not enough and the charging capacity is insufficient, which will directly affect the driving performance of the car. .
While charging is a fairly straightforward operation, there are some caveats:
1. When charging, there should be no sparks near the battery, and smoking is prohibited.
2. Wear protective clothing when charging lead-acid batteries
3. When charging one or more batteries in parallel, the charger voltage should not exceed 16V.
4. When turning on the charger, first set it to the lowest current, and then gradually increase the current until the battery starts to receive current.
5. Connect the positive lead of the charger to the positive pole of the battery, and the negative lead to the negative pole of the battery.
In the case of a deeply discharged battery or a battery at low temperature, this process may take several minutes.

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