Maintenance-free lead-acid battery The correct use and maintenance of the battery mainly have the following 9 points: 1. Check if the fixing bolt of the battery on the bracket is tight. If the installation is not secure, the housing will be damaged due to the running vibration. Also, do not place metal objects on the battery to prevent short circuits. 2. Always check if the pole and terminal are connected reliably. To prevent oxidation of the terminal, a protective agent such as petroleum jelly can be applied. 3. It is not possible to check the battery's power by direct ignition (short-circuit test), which may cause damage to the battery. 4. Ordinary lead-acid batteries should pay attention to the regular addition of distilled water. The dry charge battery should be properly charged before use. As for the maintenance-free battery that can be added with water, it is not impossible to maintain proper inspection. If necessary, supplement the distilled water to help extend the service life. 5. The air holes on the battery cover should be unobstructed. When the battery is charged, a large amount of air bubbles will be generated. If the vent hole is blocked, the gas cannot escape. When the pressure is increased to a certain extent, the battery case will burst. 6. There is often a yellow-white paste around the battery pole and cover. This is because sulfuric acid corrodes the root column, line card, fixing frame, etc. The resistance of these substances is very large and should be removed in time. 7. When the two or more batteries need to be used in series, the capacity of the batteries is preferably equal. Otherwise it will affect the battery life. Generally, such maintenance-free batteries can be stored for 10 months from the factory to the use, and the voltage and capacitance remain unchanged. The voltage and capacitance of the poor quality will decrease after about 3 months from the factory. If you choose to leave the production date for 3 months at the time of purchase, you can check whether the voltage and capacitance of the battery meet the requirements on the manual. If the voltage and capacitance are reduced, the material inside is not good, then the quality is definitely not good. It may be that the water battery is disguised after being charged by the dealer. 8. Maintenance of maintenance-free lead-acid battery electrolyte Check the residual acid in the acid pool. If it is less than 1/4 of the acid pool, the pure water that meets the technical requirements should be injected into the acid-containing tank to make it reach 2/3 of the liquid level. The amount of concentrated sulfuric acid in accordance with the technical requirements is added in a ratio of about 4:1. When adding concentrated sulfuric acid, first put the plastic stirrer into the acid pool for stirring, then slowly pour the concentrated sulfuric acid into the acid pool to prevent the sulfuric acid from splashing; when the acid is mixed, pay attention to the temperature of the acid pool. When the temperature in the acid pool is greater than 60 °C, immediately stop adding sulfuric acid, add pure water or stir to cool, when the temperature of the acid liquid drops below 45 °C, then re-adjust according to the required acid specific gravity by adding pure water or sulfuric acid; 5.2.3 Preparation of electrolyte for battery: When the temperature of the electrolyte in the acid pool is lowered to room temperature, the actual value is measured by a hydrometer and a thermometer. When the actual temperature and the specific gravity of the electrolyte meet the requirements, the weight of the dilute sulfuric acid is taken. .4 If the preparation of the electrolyte is not at room temperature, it can be corrected according to the following formula: d25 = dt + 0.00075 × (t-25) (g / cm3): where d25 represents the density converted to the standard temperature (25 ° C); Dt is the measured density; t is the temperature of the electrolyte when the specific gravity is measured. 9. The battery should not be placed for a long time, and the battery that has been deactivated for a long time should be charged and maintained regularly. There is an internal self-discharge problem in the battery. The self-discharge amount is about 2% per day. That is to say, a fully charged battery, even if it is not used at a time, will be discharged by internal self-discharge after a long time. In the case of a battery that is depleted, the plates are quickly sulfated, which greatly impairs the storage capacity. Therefore, the battery that has been deactivated for a long time should be recharged once a month for the battery, about 10 hours each time. If the battery has been left for a long time, the battery vulcanization phenomenon occurs. After the battery is fully charged, it can be repaired by using the battery online maintenance instrument for about 20 days, and the capacity can be restored.