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All You Need To Know About Batteries continuedInformationC : DRY Charge Batteries : Commissioning1. Only commission a dry-charged battery when it is neededfor a customer.2. If fitted, remove and discard any sealing plugs, tape or foil.3. If fitted, remove and keep normal vent-plugs and terminalcovers (usually red and black).4. For filling, use battery-grade dilute sulphuric acid of specificgravity 1.270 – 1.280 at 25°C conforming to BS3031 orbetter. (Note: contaminated acid with impurities canseriously damage the life of the battery, in some casesreducing this to a few days. Do not use acid from old batteries).5. The temperature of the acid and the battery should both beat room-temperature in the range 15 - 30°C.6. Fill each cell with acid to a level of 3 – 6mm above the topsof the separators. Fill each cell one after the other andcomplete the filling in one operation.7. Leave the battery for 20 – 30 minutes and then measure theopen-circuit voltage. If it is below 12.50V, charge thebattery. (See Section G). If it is above 12.50V, adjust theacid-levels to the correct operating levels with dilutesulphuric acid of specific gravity 1.270 – 1.280.See Section D.8. Fit the normal vent-plugs and terminal covers.9. Wash the battery with hot water and dry it.10. Note that performance checks on newly-commissioneddry-charged batteries with modern electronic digital testersusing conductance technology are not recommended.Examples are testers supplied by Midtronics or Bosch. Theresults can be misleading until the battery has undergonesome service use.D - Electrolyte-Levels (Acid-Levels)in ServiceNotes: Please read before adjusting acid-levels.• Do not top up to the maximum levels a battery that needscharging. (Levels rise on charging). However, if the levelsare below the tops of the separators, top up with distilled ordeionised water until the separators are just covered.• Adjust levels to the maximum levels only after the batteryhas stood for at least an hour after charging.• Never overfill a battery. (The acid may come out of thevent-plugs when the battery is being charged).• Use only distilled or deionised water for topping up.(Sulphuric acid should never be used except for the initialfilling of a battery). Do not use bottled Mineral water(impurities within the water will increase water loss andbattery self discharge).1. When the battery is in service, the electrolyte levels shouldbe checked and adjusted to the levels given below.2. If the battery has a maximum level line on the side of thecontainer, fill to this maximum level.3. If there is no maximum line, but there are filling tubesprojecting from the bottom of the lid, fill to the bottomof the tubes.4. If there is not a maximum line nor filling tubes inpolypropylene batteries, fill to 7mm (0.25 inches) belowthe bottom edge of the lid-skirt.5. If there are no filling tubes in hard-rubber batteries, fill to15mm (0.5 inches) above the tops of the separators.E - Selecting the Correct Battery for theApplicationCar and Commercial Vehicle (CV) Batteries1. Select the specified battery from the Application Sectionof this Catalogue.2. On 24 Volt systems, or when 2 off 12 Volt batteries arefitted in parallel, both batteries should be replaced at thesame time. Failure to do this will result in a greatly reducedbattery life for the new battery that has been fitted.When batteries are joined in series, the negative terminalof one battery is connected to the positive terminal of theother, giving a total voltage of 24 Volts. The Ampere-hourcapacity of the system is the same as that of the individualbatteries.When batteries are joined in parallel, the positive terminalsof the 2 batteries are connected together, and the negativeterminals of the 2 batteries are also connected together.The voltage of the system remains unchanged at 12 Volts,but the Ampere-hour capacity of the system is double thatof the individual batteries.Neptune Leisure Batteries1. Use the battery with the performance and sizerecommended by the equipment supplier.2. We recommend that a leisure battery in a medium cyclicapplication should be sized so that it is not normallydischarged to more than 50 per cent state-of-charge. Thiswill ensure that the battery gives a good life. The life of abattery regularly discharged by 50 percent is about 5 timesthat of a battery regularly discharged to 100 per cent. Forexample, a load of 4A for 10 hours will discharge a batteryby 30Ah. If this represents 50 per cent state-of-charge, wewould recommend a 80Ah battery.Neptune Marine Batteries1. The MarineLine battery range has been designed withgreater cyclic durability than the Leisureline range andprincipally designed for hotel load usages on boats.522