When performing work on or in proximity to the battery, take extra care not to inadvertently connect any tool between the negative and positive terminals, or make ground, as this causes shorting and possible severe electric shock. Fire and other sources of ignition such as smoking and spark should not come in contact with battery because has explosive gases. It is mandatory to hold on the battery using a hold-down device in order to avoid its movement and consequently acids leakage and corrosion. Daily or at least weekly visual check for cracks, leakage and overall corrosion is required and damaged batteries need to be replaced as quickly as possible. Before removing a battery, the negative terminal should be disconnected and then the positive one, next, the hold-down device should be loosened and then the battery should be removed. As the battery is removed, ensure that the battery tray is clean as well as free from rust and clear it if necessary. In installation, tighten the hold-down device but do not over tighten it as you connect the positive cable before the negative one. Non-sealed batteries need routine examination of the electrolyte level and replenishing with distilled water if needed, while a sealed battery needs to be checked with the assistance of the hydrometer that is installed on it. There is also need to ensure that battery terminal and cables are free from any form of corrosion and cleaning should be done at least once a year. In a case where the battery is not frequently used then removing the negative terminal during the period of storage is recommended. It is recommended for the electrolyte level to be controlled once a month and the addition of distilled water is necessary in freezing weather. Specific gravity tests can show battery charge and also reveal if there is swelling and if the cells are very high or very low, then they should be replaced. Battery terminals and cable clamps need to be cleaned at least once a year, the electrical connection must be good and dielectric grease can be also used to retard corrosion. In charging the battery, this should be done slowly in order not to over heat the battery and when the battery is being replaced, an amperage rating of the battery must be equivalent or higher than the original battery, to allow for the increased electrical resistance in the battery.