How to repair a lead-acid battery?

Depending on the application, lead-acid batteries are classified as either constant discharge (such as an uninterruptible power supply) or transient discharge (such as a car starter battery). Commonly used lead-acid batteries fall into three main categories:

1) Ordinary batteries: the plate of a common battery is made up of lead and lead oxides, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage, low price; the disadvantages are low specific energy (that is, energy stored per kilogram of battery), short service life and frequent daily maintenance.

2) Dry battery: the full name of dry lead-acid battery. Its main feature is that the negative plate has a high capacity 2V lead-acid battery. In a completely dry state, it can be stored for up to two years. Power, when you use it, just add the electrolyte and wait 20-30 minutes.

3) Maintenance-free battery: maintenance-free battery, due to its structural advantages, has a very small electrolyte consumption, and basically does not need to supplement distilled water during its service life. It also has the characteristics of impact resistance, high temperature resistance, small size and small self-discharge. The service life is generally twice as long as that of ordinary batteries. There are two types of maintenance-free batteries on the market: one that requires no maintenance when the electrolyte is applied in a single application at the time of purchase (replenishment is added); the other is that the battery itself has been charged by the electrolyte and sealed in the factory, the user cannot add rehydration solution at all.