At the beginning, it is recommended to adopt a preventive maintenance schedule on the battery of your car for quick and most efficient startup and the recommended safety equipments. Measures include switching off the engine and all access series, and unscrewing the negative terminal cable while working on it. The battery should not be charged near any source of ignition not to blow hydrogen gas which is flammable avoidance of smoking or use of lighted matches while charging it or placing the charging in a room that that is well aerated. Electrolyte has sulfuric acid considered as corrosive substance therefore safety glasses must be worn and contents of the electrolyte must not come into contact with skin or eyes or consumed. Examine the battery's outer shell and look at the positive post and cable lug, for signs of corrosion, loose connection or of the outer shell showing signs of cracking. If there is corrosion, then remove the battery to clean it, the ground cable should be disconnected first before the positive one. Rinse cable clamps with a battery brush containing a solution of warm water and baking soda without allowing the solution to get into the battery. The components of battery should be clean and the battery tray should not have any signs of rusting, while hold-down clamp bolts should be properly tightened not overly tightened. Any rusting metal should be put onto a zinc rich primer and auto-painted. On the charging, it is advised that you take out the battery from the car to avoid paint work destruction by the leaking gas, while slow rate charging is held as most effective means of recharging a flat battery. It is recommended to use a one or a two-amp charger, although any charger that is higher than this should not be more than 1/10 the ampere/hour of the battery. Some charging times differ, but for a trickle charger, it takes up to 12 to 16 hours. If there are cell caps, then it is necessary to take them off, if the holes are there, cover them with any cloth, and if the charger cable is like a star, connect it as it is shown on the picture. Watch the battery temperature when charging and if it is of the wet or gellable type, compare specific gravity by using a hydrometer on the removable cell caps. A fully charged battery should register 12.6 volts or more, and some of the Sealed Absorbed Glass Matt (-AGM) batteries contain integrate hydrometers, which helps check the charge level.