Car battery testing and replacement at Grimmer Motors, 998 Heaphy Terrace, Hamilton. We test your battery and charging system first, so you only pay for a new battery if you need one. We fit Repco batteries with a free warranty and recycle your old battery. Book online or call 07 855 2037.
Stress-free Car Battery Replacement in Hamilton.

If your car constantly needs jump-starting, you may need to have your vehicle’s battery replaced. Batteries allow for your stereo, lighting and air conditioning to function while the car is off. When a battery is faulty, these features can quickly drain its energy, causing your car not to start. A faulty car battery can lead to lots of unnecessary stress and result in your vehicle becoming unreliable to use.
Faulty car batteries are a common, easy to fix issue. Grimmer Motors offer high-quality battery replacement on all vehicles, regardless of their make and model. Our skilled team of mechanics can quickly replace your vehicle’s battery with a brand new one, meaning you won’t have to worry about your car going flat when you need it the most.
Looking For a New Car Battery?
At Grimmer Motors, we use Repco car batteries. These batteries provide reliable, high-quality performance to keep your car running in all conditions.
When you get your car battery changed through Grimmer Motors, you will receive a free warranty. This means that if you encounter a manufacturer-related fault during the warranty period, your battery will be replaced, free of charge.
When you buy a battery through Grimmer Motors, you can request a free email or text message reminder to be sent to you near the end of your battery warranty period. This way, you can book your vehicle in for a battery check before the warranty period expire
Advanced Testing for your Car Battery.

We use advanced electronic testing tools to see the status of your battery. This way, we can quickly determine if the car’s battery is the source of the issue. Sometimes a suspected car battery fault may actually be caused by a malfunctioning charging system or ignition system. If the battery is not the issue, we can use our advanced scanning tools to quickly diagnose the problem and suggest ways of fixing it.
Conveniently located in Fairfield, Grimmer Motors have been providing quality service to Hamilton since the company was established in 1934. When you receive battery-related services through Grimmer Motors, you can trust our fully qualified mechanics to safely and efficiently service your vehicle, advising you before further repair work is conducted.
Signs That Your Car Battery Needs Replacement
- Old age: Most car batteries last between three to five years. If your battery is more than three years old, it’s a good idea to have it checked regularly and consider replacing it.
- Slow engine cranking: If your engine is slow to start or the cranking sounds weak, it may be a sign that your battery is losing its ability to hold a charge.
- Battery warning light: Most cars have a warning light on the dashboard that indicates a problem with the battery. If the light stays on after starting the engine, it may be time to replace your battery.
- Corroded terminals: Corrosion on the battery terminals can cause poor electrical connections and affect the battery’s ability to charge. If you notice corrosion on the battery terminals, it’s time to have them cleaned or replaced.
- Electrical issues: A weak battery can cause electrical problems such as dim headlights, flickering interior lights, or a malfunctioning radio.
- Swollen or bloated battery case: A swollen or bloated battery case can be a sign of overheating and can cause damage to your car’s electrical system. If you notice any swelling or bloating, it’s time to replace your battery.
Is it the battery? A quick check
If your car won’t start, try this before calling for help:
- Turn the headlights on, then try to start the car while watching them.
- If the lights dim a lot or go out while the engine is cranking, the battery is probably low or flat.
- If the lights stay bright but the engine won’t turn over, the battery may be fine and the fault is likely somewhere else.
We can test the battery and the charging system in the workshop and tell you which it is before anything is replaced.
Other reasons a car won’t start
A flat battery is the most common cause, but not the only one. If a new battery is fitted and the real fault is elsewhere, it will go flat again.
- The alternator isn’t charging the battery. See alternator not charging the battery and car battery not charging.
- A faulty starter motor. The battery is fine but the engine won’t crank. See starter motor and alternator repairs.
- Dirty or corroded battery terminals. White or green powder on the terminals stops power getting through. See corroded battery terminals.
- Something draining the battery while the car is parked. See battery flat overnight and 10 causes of a flat battery.
How often should a car battery be replaced?
Most car batteries last three to five years. They tend to last longer in cars that are driven every day, because the alternator keeps the battery charged while the engine runs. Short trips, cars that sit for weeks, and lots of electrical use with the engine off all shorten battery life. Cold mornings are when a weak battery usually gives up, because the engine needs more power to turn over.
How much does a car battery replacement cost?
It depends on the battery your car needs. We’ll test your battery first and give you a price before we fit anything.
What affects the price
- The size and power of battery your car needs
- The type of battery: many cars with engine stop-start need a stronger EFB or AGM battery, not a standard one (for example Mazda i-stop batteries)
- Some newer cars need the new battery registered to the car’s computer after fitting
- Hybrids have a small 12-volt battery as well as the main hybrid battery. The 12-volt one is replaced like a normal battery; for the main battery see hybrid battery repair and replacement
Your old battery is recycled free of charge, and you can also drop off old car batteries for free recycling.
Car Battery Recycling
At Grimmer Motors, we correctly recycle all old car batteries and scrap metal.
When you receive a car battery replacement through Grimmer Motors, you can be assured that your old battery will be recycled correctly. You can also drop off your old car battery for free recycling.
Live/work in any of the following areas? Grimmer Motors could be extra convenient for you.
- Fairfield
- Fairview Downs
- Enderly
- Claudelands
- Peachgrove
- Hamilton East
- Chartwell
- Chedworth
- Central Hamilton
- Forest Lake, Beerescourt
- Frankton
- Melville
- Waikato
