Car batteries

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40% of all AA Roadservice calls are battery related. Don’t wait until you’re stuck on the side of the road. AA Battery Service covers the metropolitan Auckland, Wellington and Christchurch areas as well as throughout the country by our regional contractor network 365 days a year – you don’t have to be an AA Member. Let us come to you!

Benefits of a new car battery

  • Latest technology means a high quality battery, built to last at a competitive price
  • New Zealand-wide warranty of up to 3 years
  • Our batteries are sealed & maintenance free
  • We can deliver, install and remove your old battery to be recycled

4WD battery benefits

  • Heavy duty batteries are tough and built to last
  • Fully sealed, maintenance free technology eliminates acid leakage
  • Expanded grid technology ensures consistent grid quality
  • Increased electrolyte volume prevents overheating
  • Hot melt glue over plates prevents vibration damage
  • Higher cold cranking amps provide greater starting power
  • Carry handle for easy installation and removal

Car battery types explained

There are many car battery types available and we’re often asked about types of car batteries, especially the different types to match different models of cars.

AGM battery

AGM (Absorbed Glass Mat) batteries are becoming more popular with modern vehicles.

At AA Battery Service, we’ve introduced the 3884 AGM battery into our range to provide support to a number of vehicles. Please be aware that AGM batteries are heavier than a wet battery for the same case size, so care must be taken when lifting and installing them.

Stop-Start technology

Stop-Start technology switches off a car's engine when the vehicle is stopped, for example while at a red light or in a traffic jam. This delivers between 5 and 10% lower emissions, and a similar improvement in fuel economy.

Stop-Start vehicles are fitted with either an EFB or AGM battery, as they are able to cope with the higher loads and constant cycling experienced in a Stop-Start vehicle. It is important that the correct type of battery is installed in these vehicles to ensure the Stop-Start system operates correctly. Replacing one of these batteries with a conventional flooded lead acid battery will result in the vehicle deactivating the Stop-Start system, and will also result in premature failure the incorrect battery. Many major manufacturers now utilise Stop Start technology, including BMW (EfficientDynamics), VW (BlueMotion) and Mazda (SKYACTIV).

The benefits of AGM Stop Start battery technology

  • Delivers three to four times the cycle life of a conventional flooded battery
  • High charge acceptance which is critical for modern battery management systems
  • 100% leak-proof and spill-proof.
  • Excellent starting power, so you can rely on the engine starting – even at a low state of charge.
  • Totally maintenance free.

AA Battery Service is constantly expanding its range of AGM Stop-Start batteries to meet growing demand as this technology becomes more commonplace.

Calcium battery

In a calcium battery the antimony is totally substituted with calcium in all plates. This results in double the shelf life and virtually no gassing in the battery, resulting in less maintenance.

Calcium batteries do require a higher charge voltage (nominally 15 volts) to achieve the same level of charge as a normal antimony battery. They also require a periodic equalisation cycle to help maintain optimum operating condition. When installed in a vehicle designed for an antimony battery (i.e. a traditional 12 volt system which charges at 14 volts) the battery will only achieve 85% state of charge.


  • Higher cold cranking amps
  • Longer useful life
  • Can be 100% maintenance free
  • Will accept higher charge rates.


  • Takes longer recharge after being run flat
  • Requires a calcium specific charger to restore to 100% state of charge

Spiral coil battery

A spiral coil battery is an AGM battery, but with a different construction. They're often found in high performance or off road vehicles that need extra torque for starting. These batteries are more resistant to excessive vibration, heat and higher charge rates. The spiral battery can have a shelf life up to 18 months without affecting starting ability.

Gel battery

Gelled batteries, or "gel cells" contain a jelly-like substance which is due to silica gel being added to the acid. The advantage of these batteries is that it is impossible to spill acid even if they are broken. The disadvantage is that they must be charged at a slower charge rate to prevent overheating. They cannot be fast charged on a conventional automotive charger or they may be permanently damaged. Gel batteries are often found in golf buggies, back up for house alarms and electric toys.

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