12v28ah VRLA storage battery

Middle Dense Cell GD Battery is safety without acid leaked, reliable opening and closing of safe-valve prevent damage to equipment and explosion battery.The main application of Middle Dense Cell GD Battery:1. Standby power of electric Power Company, Telecom Company, Bank, and Securities Systems.2. Standby power of all kinds of emergency illumination.3. Uninterruptible Power Supply.4. Standby power of guardagainst theft and Alarm Systems.5. Power source for Power-assit cehicle. electromotive tool and toys.The mainfeatures of GD Battery:1.1 Sealed Construction GUANGDAO's unique construction and sealing technique ensure that no electrolyte leakage can occur from the terminals or case of any GUANGDAO battery. This feature insures safe, efficient Operation ofGUANGDAO batteries in any position.GUANGDAO batteries are classified as "Non-Spoilable" and will meet all requirements of the International Air Transport Association. 1.2 Absorptive Glass Mat System (AGM System) GUANGDAObatteries make use of fine mat separators (glass fiber) wherein sufficient electrolyte is absorbed to provide the longest life and steady service. This system prevents escape of electrolyte from the separator which causes leakage. 1.3 Gas Recombination GUANGDAObatteries incorporated unique design that effectively controls generation of gas and allows recombination of over 90% of gas generated during the normal use. 1.4 Maintenance-Free Operation During the expected floating service life of GUANGDAO 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. 1.5 Position-Free and Leakage-Free The combination of the sealed construction and the use of absorptive mat separators permit operation ofGUANGDAO batteries in any position without loss of capacity, electrolyte and service life.GUANGDAO batteries are made to operate in any position. 1.6 Stable Quality & High Reliability GUANGDAOBattery has stable and reliable performance. It can be easily maintained to permit proper operation of the equipment that it powers. The battery can withstand overcharge, overdischarge, vibration, and shock, and is capable of extended storage. 1.7 Long Service Life, Float or Cyclic GUANGDAOVRLA Battery has long life in float or cyclic service. The expected life of float service is shown on Figure10 and life of cyclic service figure 11. 1.8 safe sealed lead acid battery GUANGDAO batteries are equipped with a safe, low pressure venting system, which operates at 1psi 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. This low pressure venting system, coupled with the extraordinarily high recombination efficiency, makeGUANGDAO batteries the safest sealed lead-acid batteries available. 1.9 Heavy-Duty Grids The heavy-duty lead calcium-alloy grids inGUANGDAO batteries provide an extra margin of Performance and service life in both float and cyclic applications, even in conditions of deep discharge. 1.10 Low Self Discharge Because of the use of Lead Calcium grids alloy,GUANGDAO VRLA battery can be stored long periods of time without recharge. 1.11 High Recovery Capability