At present, our commonly used car batteries are mainly divided into three categories, namely ordinary batteries, dry-charge batteries and maintenance-free batteries.  Ordinary battery: The plate of an ordinary battery is composed of lead and lead oxide, and the electrolyte is an aqueous solution of sulfuric acid. Its main advantages are stable voltage and low price; its disadvantages are low specific energy (ie, electric energy stored per kilogram of battery), short service life and frequent routine maintenance. Dry-charged battery: Its full name is dry-charged lead-acid battery
. Its main feature is that the negative plate has a high power storage capacity. In a completely dry state, it can save the obtained power within two years. Just add electrolyte and wait 20-30 minutes before use. Maintenance-free storage battery: Due to its structural advantages, the maintenance-free storage battery consumes very little electrolyte and basically does not need to be supplemented with distilled water during its service life. It also has the characteristics of shock resistance, high temperature resistance, small size, and small self-discharge. The service life is generally twice that of ordinary batteries. There are also two types of maintenance-free batteries on the market: the first is that the electrolyte is added once at the time of purchase and there is no need to maintain it during use (adding supplementary fluid); the other is that the battery itself has been filled with electrolyte and sealed up before leaving the factory , The user cannot add refill at all.
In the past few decades, top lead acid battery manufacturers production has increased because of the use of sealed lead acid battery.
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sealed lead acid battery is produced by Shenzhen Power Kingdom Co., Ltd. ’s professional skills in high technology.