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All You Need To Know About Batteries continuedF - Removing Batteries and InstallingBatteries on VehiclesRemoving Batteries1. It is good practice to tell the customer that, while you will doyour best to keep the memory settings, it is possible thesemight be lost.2. Make sure the hand-brake is on, and that the car is inneutral or park. Switch off all electrical loads and removethe ignition key from the car. Note: On some cars, the doorswill lock when the battery is disconnected so this is why thekey should be removed from the car. Also switch off anynon-factory-fitted alarms.3. Check that the cigar lighter is still working. If not, turn theignition key to the auxiliary position. Install a ComputerMemory Saver (CMS).4. Disconnect the earth-connector first. (This is normally thenegative on modern vehicles). This can result in the loss ofmemory settings; please refer to the vehicle handbook.5. Disconnect the live-connector second. If a CMS is used, theconnector will still remain live after it has been disconnected.To prevent the connector shorting against the car, place aninsulator such as a rubber glove over the connector.6. Remove the hold-down clamps.Preparation of a Battery for Fitting1. Check that the battery has the correct polarity for thevehicle.2. Check that the battery has the correct height for the vehicle.(If a battery is too high, it can short out on the bonnet or thebottom of a seat, or it can damage the bonnet).3. It is good practice to place the old and new battery side byside to compare polarities, hold-downs andperformance-levels. Some batteries have hold-downs atboth the sides and ends. Only the ones used for securingthe battery on the vehicle need to be checked.4. Check that the battery is clean and dry.5. Check that the vent-plugs or manifolds are firmly in position.6. Check that the battery has a voltage above 12.40V. If not,charge the battery or use another that has a voltage above12.40V.7. Ensure the 2 terminal caps are still fitted at this stage.Preparation of the Vehicle1. Clear away any items on the battery-tray which mightdamage the battery. (Placing a heavy battery on a piece ofsharp grit can puncture the bottom of the battery).2. Check that the connectors, the hold-down clamps and thetray are clean and corrosion-free. (If there is any corrosion,hot water will instantly remove this). If there is severecorrosion which might affect the stability of the battery orhas affected other parts of the engine compartment, havethe vehicle checked by an authorised distributor.3. Check that the alternator drive-belt tension is correct.Refer to the vehicle handbook or service manual.4. It is recommended that the electrical system, andparticularly the charging system, of the vehicle be checkedto make sure it is operating correctly. Refer to the vehiclehandbook or service manual.Installing the Battery1. Fit and tighten the hold-down clamps. These should betight enough to secure the battery and not allow it to move.DO NOT OVERTIGHTEN.2. Connect the live-connector first to the correctbattery-terminal (normally the positive) after removing theterminal cap. DO NOT OVERTIGHTEN.3. Connect the earth-connector to the other terminal afterremoving the terminal cap. DO NOT OVERTIGHTEN.4. Place the 2 terminal caps on the old battery that has beenremoved from the vehicle to avoid the possibility ofshort-circuits.5. Replace onto the new battery any components that havebeen taken from the old battery such as exhaust tubes,vent-elbows, terminal covers, removable hold-down strips(widgets) etc.6. The use of petroleum-jelly (Vaseline) is not necessary onmodern polypropylene batteries, but there is nodisadvantage in using it. Smear lightly on the terminals.It is still recommended for hard-rubber batteries. Do notuse grease.7. Remove the CMS.8. Start the engine9. For non-automotive applications, install the battery in linewith the equipment-supplier’s recommendation.G - Charging Off-VehicleNote: Please read before charging batteries• Do NOT charge a battery if its temperature is below 3°C asthe electrolyte may have frozen.• Charging the battery on the vehicle is not recommended.• Refer to Section F for information about removing thebattery from the vehicle.• ‘Sealed and AGM’ vehicle batteries should be charged onlyon constant potential chargers or ‘smart’ chargers. Do notcharge on constant current chargers or boost chargers.‘Sealed’ vehicle batteries do not allow any access to theelectrolyte, and so cannot be topped up. There are noremovable vent-plugs or manifolds. The battery is able tovent gases through breathing holes, and so it is not strictlysealed.• A new, unused battery with a voltage below 11.00V shouldbe scrapped and not charged. See Section B.InformationYUASA - The world's leading battery manufacturer523