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Valve-regulated lead-acid (VRLA) technology encompasses both gelled electrolyte and absorbed glass mat (AGM) batteries. More than a decade ago, East Penn began building valve-regulated batteries using tried and true technology backed by more than 50 years experience.
VRLA batteries can be substituted in virtually any flooded lead-acid battery application (in conjunction with well-regulated charging), as well as applications where traditional flooded batteries cannot be used.
It never needs watering, and should never be opened as this would ?°poison?± the battery with additional oxygen from the air. The ?°acid-starved?± condition of gel and AGM batteries protects the plates during heavy deep-discharges.
Wet batteries do not have special pressurized sealing vents, as they do not work on the recombination principle. Therefore, they are not air transportable without special containers.They cannot be shipped via UPS or Parcel Post or used near sensitive electronic equipment. While our VRLA batteries accept a charge extremely well due to their low internal resistance, any battery will be damaged by continual under- or overcharging.
The charger must be temperature-compensated to prevent underor overcharging due to ambient temperature changes. For safety??s sake, these potentially explosive gasses must be allowed to vent to the atmosphere and must never be trapped in a sealed battery box or tightly enclosed space!
Our VRLA batteries will work in SLI (Starting, Lighting and Ignition) applications as long as the charging voltage is regulated to the appropriate values from the tables on page 11. Minutes discharged at 50, 25, 15, 8 and 5 Amperes Minutes discharged is the time in minutes that a new, fully chargedbattery will deliver at various currents and maintain at least 1.75 volts per cell. Most system designs will specify a battery that will deliver a minimum of twice the capacity required. CHART BCharging Current vs.Charging TimeShown is the current needed to charge a battery from 0% to 90% state of charge in a given time.
A critical feature of any VRLA battery, gelled or absorbed, is the quality of the sealing valve. Our AGM electrolyte contains high purity sulfuric acid and absolutely pure totally demineralized, deionized water to increase battery performance.
Our AGM topping process assures that the maximum retainable electrolyte quantity is held within the battery separators, without leaving any unabsorbed liquid to spill or leak. East Penn is the only battery manufacturer that uses tank formation to activate the battery plates.
One of the causes of self-discharge in batteries is the minute electrical currents that flow between each cell through the partition at the weld area. We block these currents by using an exclusive weld seal or gasket.This feature dramatically reduces self-discharge to less than 3% per month: the lowest self-discharge rate of any battery manufacturer and seven times lower than many conventional batteries! This exclusive alloy provides longer shelf life, more powerper-pound and superior corrosion resistance. While other manufacturers cut costs by using automotive style grids, we use a high-performance deep cycle grid. Electrolyte in an AGM battery is strongly held by the capillary forces between the glass mat fibers, but not completelyimmobilized. This feature makes carrying, installation and removal easier, more convenient and less time consuming.
Our batteries are delivered with the most popular type of terminal; however, on a special order basis many terminal options are available. We design and mold our own rugged polypropylene cases, vents and covers in our on-site, state-of the-art plastics molding facility.
It??s nice to know that every possible safeguard was designed into our process to protect our co-workers and the environment?­ special safeguards that are exclusive to East Penn. The EM52 by Siltron is an ideal choice for commercial applications where ease of installation, reliability, and moderate remote loads are required.
Description: The EM52 by Siltron is an efficient, and maintenance free emergency light designed for use in commercial applications. Both types are valve-regulated and have significant advantages over flooded leadacid products. East Penn??s unique computer-aided manufacturing expertise and vertical integration have created a product that is recognized as the highest quality, longest lived VRLA battery available from any source. East Penn manufactures high power gel and AGM batteries with excellent performance and life. However, upside-down installation is not recommended.* Connections must be retorqued and the batteries should be cleaned periodically.

However, upside-down installation is notrecommended.* Connections must be retorqued and the batteries should be cleaned periodically. This means that the oxygen normally produced on the positive plates of all lead-acid batteries is absorbed by the negative plate.
Our gel cells have triple the deep cycle life of wet cell antimony alloydeep cycle batteries, due to our unique design.
Our manufacturing process features improved controls using state-of-the art computers and the latest manufacturing technology and equipment.
Not only must the valve keep the cell pressurized and safely release excessive pressure and gas due to overcharging, but it must also keep the cell from being contaminated by the atmosphere. Our gelled electrolyte contains sulfuric acid, fumed silica, pure demineralized, deionized water, and a phosphoric acid additive. Since the designs are ?°acid-starved?± to protect the plates from deep discharge, the acid concentration can drop to nearly zero during an extremely deep discharge. Thisextra reinforcement locks the active material onto the plate for longer life and extended performance.* The ultra-clean separators have no oil contamination or other impurities. Each of our plate lugs is automatically milled to assure the highest quality strap with no loose or dropped plates. A battery can lose its critical pressure through tiny pores and fissures in the battery terminals.
Stratification is possible in extremely tall cells, but cannot occur in batteries of the size covered in this document. This gives you total flexibility to specify the proper terminal for your application?­ without making compromises. This provides ultimate control of our high performance designs, quality and delivery to our manufacturing plant, assuring you the highest quality battery and most reliable service.
One benefit is assurance of a consistent source for batteries without fear of governmental interference or delays.
After initial charging, every battery is discharged and then recharged at the factory. The unit has two Par36 Sealed Beams which illuminate in emergency battery back up mode for at least 90 minutes during a power failure. AGM batteries excel for high current, high power applications and in extremely cold environments.What is the difference between VRLA batteries and traditional wet batteries? This is especially true of antimony and hybrid types.* continually over-discharged, due to active material shedding. The shelf life of a VRLA battery is seven times higher than the shelf life of a deep cycle antimony battery. Although most of the normal gasses (oxygen and hydrogen) produced in a VRLA battery will be recombined as described above, and not escape, oxygen and hydrogen will escape from the battery in an overcharge condition (as is typical of any type battery). Using a 50% depth of discharge (versus 80% or 100%) will dramatically extend the lifeof any battery. Therefore, the VRLA batteries produced by East Penn consistently meet the highest quality performance and life standards.
The phosphoric acid is a key reason that our batteries deliver dramatically longer cycle life than leading gel competitors and 3 times longer cycle life than traditional wet cells. Substances that will not dissolve in acid may become soluble when the concentration drops this low.
We have designed and built the newest, state-of-the-art gel battery manufacturing facility in the world. Most other manufacturers fill their gel cells in a one step process, vibrating the battery with hopes of releasing most of the air pockets.This system is less than perfect and leaves voids or air pockets at the critical gel-to-plate interface. The extra handling of the plates provides an additional inspection step in the process to verify plate quality.
The hefty ?°power rods?± designed into our grids not only lock the active material onto the grid, but also act as ?°bus bars?± to collect and direct the energy to the terminals. Pressure loss is harmful to the battery and is evident by black posts, which are caused by sulfuric acid fumes escaping from the battery through and around the lead posts and bushings. Mounting: This emergency light is mounted on the surface of a wall or ceiling via universal easy back-plate for labor saving installation. Overcharging dries out the electrolyte by driving the oxygen and hydrogen out of the battery through the pressure relief valves. Therefore, when helping to specify a battery for a system, choose a battery with at least twice the capacity required for best performance. Upon recharge, these dissolved substances crystallize outof the electrolyte, potentially destroying the battery.

These voids are non-reactive and reduce overall battery performance.Our process fills and vacuums each cell several times.
Ultrapremium, Gel Glass Mat, Double Insulating Separators Another critical component is the separator, which isolates the positive from the negative plate. This ends the battery??s service life.Our AGM separators wrap around the bottom of the plate and are wider than the plates. Since the concentration is not uniform, diffusion (spontaneous mixing by random molecular motions) begins. Before shipment, every battery is required to stand for a designated period of time.Beginning and ending voltages are compared.
If 50 Ah is required, specify at least a 100 Ah battery.CHART AIndependent Laboratory Testing BCI 2-Hour LifeGroup Size ?°27?± Batteries East Penn Gel and AGM vs.
This multi-step process assures complete evacuation of air and complete gel-toplate interface. These pores and fissures are caused by the industry??s method of casting posts and bushings. If this mixing occurred rapidly, stratification would not occur, but it is relatively slow, allowing lighter parts of electrolyte to ?°float?± toward the surface and heavier parts to ?°sink?±toward the bottom.The top portion of the plates do not perform as well in contact withlower concentration electrolyte. This extra quality assurance step verifies that the critical pressurecontrol valves are functioning properly.* Filling Weight Control. Like gelled electrolyte batteries, absorbed electrolyte batteries are also considered non-spillable ?C all of the liquid electrolyte is trapped in the sponge-like matted glass fiber separator material. If a battery is continually undercharged, a power-robbing layer of sulfate will build up on the positive plate, which acts as a barrier to recharging. CompetitorThis chart compares the cycles run until the battery capacity dropped to 50% of the 15th cycle??s capacity (on discharges at the 2-hour rate to a 10.5-volt cutoff). Our exclusive gel electrolyte is formulated, mixed and controlled to assure proper ?°set?± in every battery.
Computer control delivers superior consistency for gel battery performance that is unequaled. Our computerized process also weighs every battery before and after filling as a check for proper gel levels.
To prevent life-shortening mossing in our gel batteries, we use a special polyester fiber sheet that is wrapped around the edge of each element, similar to the wrap in an industrial battery. This method produces tiny air pocketsand paths which allow corrosive gas to escape, causing life shortening depressurization, cell dry-out and corrosion damage.To eliminate this problem, we use forged terminal posts and bushings, which are completely solid with absolutely no porosity.
The bottom portion of the plates do not perform as well with the higher concentration, and will corrode prematurely.
East Penn??s computer-controlled gel mixing and filling equipment ensures homogenization of the mix. Our temperature-controlled process and specially designed equipment assure a homogenous gel. The benefit is longer life, better performance and no leakage of corrosive gas?­especially important when installed in or near sensitive electronic equipment. High voltage ?°equalization?± charging is sometimes used in wet batteries to make gas bubbles that re-mix the electrolyte.Because the immobilized gel will not ?°float?± or ?°sink?± within itself when a non-uniform concentration exists, it cannot stratify. This assuresthat the exact amount of electrolyte is in each battery.* Multi-Staged Filling and Vacuuming Process. It is important to note that our equipment was designed by our engineers specifically for gel mixing?­ even down to the contour of the tank bottoms and feed pipe locations. Multi-staged vacuuming assures complete electrolyte-to-plate interface, with nopower-robbing air pockets.* Computerized Polarity Check. The AGM filling process assures that each cell is saturated with the maximum amount of electrolyte that can be held by the separators, without leaving excess electrolyte that could spill or leak.
A sensitive computermonitors the voltage drop during this discharge to assure that every battery performs as designed.* Formed Element Inspection. Elements are assembled and charged outside the battery container in a computerizedforming and drying process. Forming each plate outside the battery assures the highest quality, best matched plates in the industry, and also allows a visual check before and during assembly.

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