There is a wide range of options available in today’s market

Whether it is replacing a poor performing battery in an everyday vehicle, upgrading a 4WD or powering a vehicle fitted with Idle Stop Start (ISS) technology, understanding the differences between battery types is essential.
The three most common automotive battery technologies available are Calcium batteries, Enhanced Flooded Battery batteries and Absorbent Glass Mat batteries.
R&J Batteries explains that each offers distinct benefits depending on the vehicle’s requirements, driving habits, and customer budget.
Calcium Batteries
Calcium batteries are the most widely used among the three. These lead acid batteries have small amounts of calcium added to the positive and negative grids which enhances grid durability.
Calcium batteries are called maintenance free because the water in the electrolyte doesn’t evaporate like it does in conventional lead acid batteries, which eliminates the need for regular maintenance to top up (replace) the water.
Enhanced Flooded Batteries (EFB)
EFB batteries are a mid-range option which are relatively new to the market and have been specifically designed to meet the needs of modern Idle Stop Start (ISS) vehicles.
Built on the Calcium battery design, EFB batteries benefit from improvements which increase charge acceptance, cranking power and the ability to constantly function at a Partial State of Charge (PSoC).
EFBs are considered to be an entry level option for vehicles with ISS technology.
Absorbent Glass Mat (AGM) Batteries
R&J Batteries says AGM batteries are the ultimate choice for premium and prestige vehicles, including those fitted with ISS systems.
AGM batteries differ from flooded batteries in several ways, though the basic chemical reaction remains the same.
They use a compressible glass mat to separate the positive and negative plates; these glass mats also absorb and suspend the electrolyte needed for the battery to function.
This design improves durability and resistance to vibration, resulting in a longer service life when compared to Calcium and EFB batteries.
AGM batteries are well suited to vehicles with high accessory and technology demands, as well as those with ISS systems to help save fuel.
In terms of cost, AGM batteries are more expensive than Calcium and EFB batteries because they are more complex to manufacture.
While it is possible to upgrade a battery to a higher construction type, R&J Batteries explains downgrading is never advisable.
A vehicle initially fitted with a Calcium battery can almost always be upgraded to an EFB if the case size matches. Downgrading from an EFB battery to a Calcium battery however will lead to premature failure.
The installation environment also plays a crucial role, particularly in terms of temperature. Flooded batteries are better at managing heat compared to AGM batteries, as the electrolyte helps transfer heat to the outside of the case.
It is also sometimes possible for ISS vehicles to upgrade from an EFB to an AGM, depending on the battery location and the charging system of the vehicle.
If the original battery had a heat shield installed, it must always be installed around the replacement battery as this reduces the heat transferred to the battery which extends battery life.
Choosing the best battery for Australian conditions
From city commuting to long distance touring, Australian drivers rely on their vehicles in a wide range of operating conditions.
Selecting the correct battery technology not only helps ensure reliable starting performance but can also maximise battery life and support the increasing electrical demands of modern vehicles.
R&J Batteries explains it offers a comprehensive range of Calcium, EFB, and AGM batteries from global brands such as ACDelco, Delkor, Predator, OPTIMA and more.
One hundred percent Australian owned and independent, R&J Batteries says its formula for continued success is attributed to three founding principles: “our people, our products and our service.”
It invites you to visit the nearest R&J Batteries branch for expert advice on choosing the correct battery for the vehicle.

For more information, visit www.rjbatt.com.au or call 1300 769 282.