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15% Off All Online Orders of Select Parts and Accessories
Receive 15% Off Your Online Purchase. Use promotional code MMJ15 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Batteries, Wheels, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner, Champion and BBK Performance. Valid online until 2:59 am EST on 2/2/17. Online orders scheduled for in-store pick up must be completed by closing on 2/1/17 for discount to apply.

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Lead Acid Car Battery


Lead Acid Car Battery

The lead acid car battery was the first rechargeable battery produced for commercial use. The battery is a storage device, which stores energy and provides a power source for all of the electrical and electronic accessories. It is a physical reserve of energy within the car that is used to power the vehicle during starting and during operation to provide energy for the lighting system and accessories.

What is a AGM Battery and how does it work

How Does it Work?

  • A battery stores energy in chemical form that can be released on demand as electricity.
  • This electrical power is used by the car’s ignition system for cranking the engine.
  • Should the alternator or accessory drive belt fail, the battery might also need to power the vehicle’s entire electrical system for a short period of time.

How is it Made?

  • Car batteries are made up of alternating negative and positive plates of lead and separators.
  • Plates are bundled to produce about 2.2 volts and inserted into cells in the case.
  • Cells are tied together by a strap of which one end forms the positive battery terminal and the other, the negative.
  • These plates are submerged into an electrolyte solution of sulfuric acid and water.

Why Does it Fail?

  • Old age.
  • Heat, cold and vibration.
  • Elements in the electrical system that drain your battery.
  • Leaving your headlights, radio, etc on when your car isn’t running.

What are the Symptoms of Failure?

  • Slow engine crank.
  • Issues with electrical components.
  • Dashboard warning light.
  • Swollen battery case.
  • Old age.
  • Weird smell.

What are the Implications of Failure?

  • Most frequently, the vehicle will fail to start.
  • Conventional car batteries last 3-4 years, much shorter in hot climates and those with poor road-quality.

How Difficult is the Install?

Difficulty Rating:


  • Installation difficulty varies by vehicle

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