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Here are main features of the sealed lead acid batteries. Sealed lead acid batteries ( VRLA ) batteries manufactured by the Power Kingdom brand are a wise choice for various applications in the industry. Power Kingdom ps sereies VRLA batteryAGM technology:     Power Kingdom batteries make use of fine mat separators (glass fiber) wherein sufficient electrolyte is absorbed to provide the longest life and steady service. This system prevent escape of electrolyte from separator which causes leakage. Gas recombination:   Power Kingdom batteries are incorporated unique design that effectively controls generation of gas and allows recombination of over 90% of gas generated during the normal use.   Maintenance free operation:    During the expected floating service life of power kingdom batteries, there is no need to check the specific gravity of the electrolyte or add water, which means they require no maintenance service. In fact, there is no provision for these maintenance functions. Position free and leakage free:    The combination of the sealed battery construction and the use of absorptive mat separators permits operations of power kingdom batteries in any position without loss of capacity , electrolyte and service life. Power kingdom batteries are made to operate in any position. Low pressure venting system:    Power kingdom batteries are equipped with a safe, low pressure venting system , which operates at 1 psi to 6psi, designed to release excess gas and reseal automatically in the event that gas pressure rises to a level above the normal rate. Thus, there is no excessive build up of gas in the batteries. Economical and recycling:    Compared with lithium or other batteries, sealed lead acid batteries are readily available and lower in cost. The technology is more mature and has a complete recycling system. Wide operating temperature:    Power kingdom lead acid batteries may be discharged over a temperature range of -20°C(4°F) to 50°C(122°F),and charged at temperatures ranging from 0°C(32°F) to 40°C (104°F). High recovery capability    Power Kingdom batteries have an excellent charge acceptance and recovery capability even after deep discharge.

 lead-acid batteries are one of the earliest types of rechargeable batteries. They are the most widely used rechargeable battery.They are used in back-up power supplies for alarm and smaller computer systems (particularly in uninterruptible power supplies, UPS) and for electric scooters, electric wheelchairs, electrified bicycles, marine applications, electric vehicles or micro hybrid vehicles, motorcycles and Wind, solar ,renewable energy storage system.The lead acid  battery construction is illustrated below.Positive Plate：positive plates are plate electrodes of which a grid frame of lead-tin-calcium alloy holds porous lead dioxide as the active material Negative Plate：negative plates are plate electrodes of which a grid frame of lead-tin-calcium alloy holds spongy lead as the active material Separators：Power Kingdom lead acid battery separators, which retain electrodes and prevent shorting between positive and negative plates adopt a nonwoven fabric of fine glass fibers that is chemically stable in the diluted sulfuric acid electrolyte. Being highly porous, separators retain electrolyte for the reaction of active materials in the plates. Valve(one way valve): The valve is comprised of a one way valve made of material such as neoprene. When gas is generated in the battery under extreme overcharge consideration due to erroneous charging，charger malfunctions or other abnormalities，the vent valve opens to release excessive percific rang(5 to 45 kpa ). During ordinary use of the battery, the vent valve is closed to shut out outside air and prevent oxygen in the air from reacting with the active material in the negative electrodes. Positive and negative terminals:Positive and negative electrode terminals may be fasten tab type, bolt fastening type, threaded post type, or lead wire type, depending on the type of the battery. Sealing of the terminal is achieved by a structure which secures long adhesive-embedded paths and by the adoption of strong epoxy adhesives. Battery case: Material of the body and cover of the battery case are manufactured from ABS resins, unless otherwise specified. Power Kingdom brand battery has been promoting in the international market since 2002. As a VRLA battery manufacturer and supplier, we have developed one of the most comprehensive battery ranges within the industry. Our factory acquired with ISO9001, ISO14001 and also honored with UL, CE, VdS certificate. All Power Kingdom batteries comply with international standards. We also provides OEM or custom battery solutions for our clients.

INTRODUCTIONInvented in 1859, lead-acid batteries are one of the earliest types of rechargeable batteries. They are the most widely used rechargeable battery.A lead-acid battery consists of a number of cells. Each cell has positive and negative plates, separators and electrolyte, all contained in a battery container. Cells are densely packed with alternating lead and lead oxide sheets.There are two main types of lead-acid batteries: Flooded (or wet) Cells and Maintenance Free Sealed Lead Acid Batteries (SLA). Sealed Lead Acid Batteries are also referred to as Valve-regulated lead–acid (VRLA ) batteries.MAIN APPLICATIONSMost of the world's lead–acid batteries are automobile starting, lighting, and ignition (SLI) batteries, with an estimated 320 million units shipped in 1999.In 1992 about 3 million tons of lead were used in the manufacture of batteries.Valve-regulated lead–acid (VRLA ) batteries cannot spill their electrolyte. They are used in back-up power supplies for alarm and smaller computer systems (particularly in uninterruptible power supplies, UPS) and for electric scooters, electric wheelchairs, electrified bicycles, marine applications, electric vehicles or micro hybrid vehicles, motorcycles and Wind, solar ,renewable energy storage system.Power Kingdom provides different types of sealed lead acid batteries, each with a specific set of features:1.General Purpose 2. Deep Cycle series 3. AM Gel 4. High-Rate series 5.front terminal series.GENERAL PURPOSE  VRLA  BATTERYThe General Purpose battery is the most versatile of the four and is reliable for backup or cycling. Power Kingdom general purpose VRLA batteries include PS(0.8AH to 28 AH) , PK(33AH to250AH) & PL(100AH to3000AH) series. They are used in such fire and security systems, UPS battery backups, solar wind renewable energy system ,household mechanisms as sump pumps and riding toys. Starter batteries for automotive use are considered general purpose, too.They provide the initial power needed to start the engine, and are then recharged during driving.DEEP CYCLE AGM BATTERYThe Power Kingdom deep cycle AGM batteries provide enhanced performane and brilliant reliability in long period cycling use. Term deep cycle refers to the fact that they can be discharged down to as low as 20% of a full charge. The deep cycle AGM battery series offer an exceptionally long cycle life Compared to standard AGM making them the ideal batteries for tour car, forlift, golf car, cropper, electric car, wheelchair and mobility scooters, industrial floor scrubbers, RVs, and trolling motors for fishing boats or other marine applications, solar power and other renewable energy applications. The life of this type of battery, or the number of cycles, depends on the average depth of discharge. If the discharge is too small or very deep, the battery will not last as long as one with an average depth of discharge around 50%. AGM GEL BATTERYCompared to general purpose battery series, AGM Gel series battery is filled with gel not Sulfuric, AGM gel battery has wider operating temperature (-20℃-50℃）and more stable performance at lower/higher temperature. Power Kingdom AGM Gel battery can be used for standby power supplies, such as UPS & EPS, Automatic door system, Power tools, Telecommunications, Railway systems, solar power, wind power system.HIGH RATE VRLA BATTERYPower Kingdom high rate series VRLA batteries provides constant power backup that UPS system and critical backup applications require.The high rate series VRLA batteries have been designed specifically for UPS system, startup standby power supply system, electric tool. They have a long lifespan and need little maintenance, making them ideal for data centers, emergency lighting or server banks. FRONT TERMINAL  VRLA BATTERYThe additional function of the easy-to-use front terminal connector ensures that it is easy to install and maintain when installed in the battery cabinet. Utilizing a special thick plate design for demand of long life.Power Kingdom front terminal series VRLA battery have been designed to be used in UPS system and telecom equipment.

The lead-acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It was the first rechargeable battery for commercial use. Despite its advanced age, the lead chemistry continues to be in wide use today. There are good reasons for its popularity; lead acid is dependable and inexpensive on a cost-per-watt base. There are few other batteries that deliver bulk power as cheaply as lead acid, and this makes the battery cost-effective for automobiles, golf cars, forklifts, marine and uninterruptible power supplies (UPS).Lead acid is available in large quantities with little worries relating to security of the supply and in a variety of off the shelf pack sizes. Lead acid is great fit for large scale stationary applications where space is abundant and energy requirements are low.AdvantagesInexpensive and simple to manufacture; low cost per watt-hourLow self-discharge; lowest among rechargeable batteriesHigh specific power, capable of high discharge currentsGood low and high temperature performance