Types of car batteries

With so many different types of car batteries, it can get confusing as to which one your car needs.

Lead-Acid battery

Lead-acid batteries consist of lead-plate electrodes in a sulfuric acid electrolyte fluid. Lead-Acid batteries power the car’s initial crank cycle – and are the most affordable battery on the market. These batteries are heavy and relatively delicate – the amount of charge is also affected if they are powering too many auxiliary systems.

Absorbent Glass Mat

Absorbent Glass Matt or AGM batteries are similar to lead-acid batteries, however, the electrolyte is absorbed into a porous glass mat inside the battery. AGM batteries are suited to being discharged and are more robust than lead-acid batteries. They are more expensive than lead-acid batteries and more vulnerable to heat. 

Gel Lead-Acid

Gel Lead-Acid or Gel Batteries mix the electrolyte with a gelling agent. They are more resistant to damage and can be cycled more often.  

Enhanced Flooded Battery

Enhanced Flooded Batteries or EFBs are a modern version of the regular wet lead-acid batteries. They are capable of supporting the demands of stop-start systems and are a more affordable alternative to Absorbent Glass Mat or Gel batteries.  

Deep cycle batteries

Deep Cycle batteries can be any of the above types of batteries but they are specialised for a long-term discharge – rather than a burst of sudden power like a starter motor. Deep cycle batteries are used in dual-battery setups, and are suited for powering auxiliary systems over longer periods of time of between 5 to 20 hours.