The purpose of the battery is to supply the necessary current to the starter motor and the ignition system while cranking to start the engine. Traditionally, this is called an SLI, for Starting, Lighting, Ignition, and its main purpose is to start the engine. Once the engine is running, power for the car is supplied by the alternator.

Battery that contain unformed plates, filled with sulfuric acid and charged.

1. Disconnect the negative battery cable using a wrench. Be extremely careful not to place metal tools or objects across the battery posts. Auto batteries can be explosive.
2. Disconnect the positive cable. Positive cables are usually marked with the color red and a "+" symbol. Use the terminal puller for easy removal (top post batteries.)
3. Remove the automotive battery hold-down clamp or retaining system. Place parts and fasteners aside, in a place where they won't get misplaced.
4. Remove the battery itself, being careful not to knock it around too much. Use a battery carrying strap, if it is a top post battery, to make it easier to handle.
5. Install new battery and secure with retainer. Before removing the battery post safety caps, make sure that the battery connectors are clean, and that the red post is in the right spot for the positive battery connector.
6. Wipe down the new battery and be sure terminals are clean. Then apply a thin layer of dielectric grease and anti-corrosion washers to both posts and connectors.
7. Connect the positive post first, then tighten the connector until it is snug. Then connect the negative post and tighten the connector until it is snug. Reassemble the retaining system and check for movement. You're finished!

1. Take out your jumper cables.
2. Place both vehicles in Park or Neutral and shut off the ignition in both cars.
3. Attach one of the red clips to the positive terminal of your battery.
4. Attach the other red clip to the positive terminal of the battery of the other car.
5. Attach one of the black clips to the negative terminal of your battery.
6. Attach the other black clip to the negative terminal of the other car.
7. Start the working vehicle and let the engine run for a few minutes.
8. Try to start your vehicle.

An ampere hour (abbreviated AH, or sometimes amp hour) is the amount of energy charge in a battery that will allow one ampere of current to flow for one hour. An ampere is a unit of measure of the rate of electron flow or current in an electrical conductor.

It is consists of strong plastic container that contain positive and negative lead plates, separators and battery acid.

It is the number of minutes a battery can sustain some voltage under a 25 ampere discharge. This is very important as it provides emergency power such as for ignition, lights and so on. The higher the minute rating, the higher the chance for the car to run for a longer period before recharging is needed.

Cold Cranking Amperes (CCA) is a rating to show how much current can a battery produced to the starter motor for a particular time.

Refer to vehicle’s manual for battery group size and minimum rating. Or else, look up for the vehicle models and year in battery application guide. Take note for the group size and rating. Do not use lower one than your car rating. Instead, higher rating can provide longer battery life, especially in starting an older car.

Terminals and vent plugs need to be clean. Explosion may occur if the vent plug is blocked. Pay attention to the water level of each cell and fill up with distilled water or battery water when necessary, without over filling. Do not use polluted water because it can ruin the power and the battery life.

Since it is maintenance free, it is made without adding distilled water for the period of the warranty and as long the environment is suitable. In case for hotter region area, this may weaken the battery life due to gas release. Have battery heat shields installed to keep the battery temperature down as well as avoiding parking under the sun.

Whether they are charged or not, it must be handle carefully to avoid any explosion due to sulphuric acid. When the battery is charged, it must be done in well-ventilated area. The red positive lead is connected to the positive terminal and black negative lead to the negative terminal. Before and after charged, make sure the charger connection to the lead is off to avoid sparks. Do not charged a damaged or frozen battery. Plus, prolong the charging is prohibited.

Some of the examples are slow in igniting the motor; quick power loss; headlights are dim-lit; battery discharged indication for some time even after the engine is on, and etc.

The lifespan differs from the perspective of vehicle, region, and driving patterns. A normal lead acid battery will up to 18-36 months.

• Switch off any electrical items (radio, lights) when the engine is shut.
• Check the wiring system. Short circuit will drain the battery.
• Check for any fault in alternator belt.

Each cell of a lead storage battery contained plates of lead (cathode) and lead coated with lead dioxide (anode). Through chemical reaction, the electrons flows through the conductor to produce electricity.

The function of the battery is important to supply current to the starter motor and ignition while turning on the engine. Plus, it provide extra current when the demand is higher than the alternator can provide and act as an electrical storage.

• Pros
  
  • Can be overcharged
    This battery can take up slow charges and fast charges to start the car. Still, the battery is needed to be charged after prolong inactivity.
  • Highly reliable and great working capabilities
    Cheaper compared to Maintenance Free Battery. It is very reliable.
• Cons
  
  • Environmental concerns
    Long exposure to lead can cause kidney failure and brain damaged and cancers.
  • Corrosion
    Lead acid battery always corrode which causes loss of the chemical reaction inside the battery.
  • Sulphucation
    The formation of lead sulfate causes an internal resistance and makes the battery weak.

• Pros: 
  • Less preventive maintenance
  • Faster recharge
  • Greater overcharge resistance
  • Reduced terminal corrosion
  • Longer shelf life
  • Environment friendly
• Cons: 
  • No filler caps
    If too hot, the water boils away, so they can’t be topped off like wet charged battery.
  • Prone to deep discharge (dead battery)
    Caused by increase of   shedding of active material.