Ten years ago, a 4WD battery had to start the engine and run the lights. Today, a typical touring rig might be running:
- A 12V fridge (40–60W continuous)
- Dual battery system with DC-DC charger
- Electric winch (300–400A peak draw)
- Drawers with internal lighting
- Inverter for devices
- Communication equipment
- Dash cam and tracking device
Your factory battery wasn't designed for all of that. And your factory alternator may not be keeping up with recharge requirements, especially in stop-start town driving.
Heat and Batteries
Heat kills batteries. Every 10°C above 25°C halves the expected life of a lead-acid battery. In Alice Springs summers, under-bonnet temperatures regularly exceed 60°C.
A battery that might last 5 years in a southern city will often last 2–3 years in Alice Springs. When it fails, it tends to fail suddenly — and often in inconvenient places.
Signs Your Battery Is Struggling
- Slow engine cranking, especially when cold or after the vehicle has sat
- Accessory loads dimming lights slightly
- Battery warning light
- Flat battery after the vehicle has sat for a few days
What We Check
We do a proper load test — not just a voltage check. A battery can show 12.6V at rest and still fail under load. We test it under realistic load conditions and give you a straight answer on whether it needs replacing.
Book your 4WD in today and we'll give it a once-over for you.
