As the temperature drops, many South African drivers find themselves turning the key on a cold morning… only to hear a slow crank or, worse, nothing at all. A flat or failing battery is one of the most common winter-related car issues — and it’s no coincidence.
Understanding how cold weather impacts your car battery can help you avoid the inconvenience of a breakdown and keep your vehicle running smoothly through the winter months.
Why Do Batteries Struggle in Cold Weather?
Batteries rely on chemical reactions to generate power, and cold weather slows these reactions down significantly. At around 0°C, a typical car battery can lose up to 35% of its strength, and this loss increases as temperatures drop further. That means your battery has less power to crank the engine — just when your engine needs more effort to start.
The Automobile Association explains that batteries under strain from cold temperatures are more likely to fail, especially if they’re already a few years old or haven’t been maintained properly.
Increased Demand, Decreased Output
In winter, your vehicle also places more demand on the battery — think of heaters, demisters, headlights, and windscreen wipers running more often. When the battery is already weakened by the cold, this extra load can tip it over the edge.
As outlined by battery experts at Yuasa, even newer batteries can underperform in low temperatures if they’re not fully charged or are subjected to repeated short trips, which don’t allow enough time to recharge.
How to Protect Your Battery in Cold Conditions
Here are a few practical tips to keep your battery in top shape during the chilly season:
✅ 1. Get Your Battery Tested
Don’t wait until it fails. Visit your local Naskar for a free battery test — we’ll assess its charge level and overall health, so you can replace it before it lets you down.
✅ 2. Drive Longer Distances
Short trips don’t give your alternator enough time to recharge the battery. Try combining errands or taking slightly longer routes to allow for proper recharging.
✅ 3. Switch Off Electronics When Starting
Before you turn the ignition, switch off lights, the radio, and climate control to give the battery full capacity to start the engine.
✅ 4. Check the Terminals
Dirty or corroded terminals can reduce battery efficiency. Keep them clean and tightly connected to avoid voltage drops.
✅ 5. Replace Ageing Batteries
If your battery is more than three years old, it’s wise to have it checked or replaced — especially if you’re noticing slow starts or dimming lights.
Stay Powered Up This Winter
While winter in South Africa might not be as extreme as in colder regions, cold mornings and wet conditions can still cause serious problems if your battery isn’t in good condition. Make the smart choice this season: drop by Naskar for expert advice, a free battery test, and a wide selection of trusted brands like SABAT. A small check now can save you from a big inconvenience later.
