❄ Winter Battery Care
How to Protect Your Car Battery & Prevent Winter Starting Problems
With just a few minutes of care, you can reduce the potential of electrical system issues such as a dead battery and keep your vehicle running smoothly.
Quick Tips
Essential guidelines to keep your battery healthy during winter months
Avoid Charging Frozen Batteries
A discharged battery can freeze easily. Never attempt to charge it until you warm it.
Thaw Naturally Indoors
Let a frozen battery warm up in a heated area before charging. Do not apply direct heat.
Don't Rely on Jump-Starting
Jump-starting may get your engine running but won't fully recharge your battery. Driving or idling may take hours or longer.
Use a Slow Charger
For best battery health,recharge slowly at 2–4 amps. A full charge from dead can take several hours to two days.
How to Protect Your Battery
Follow these essential steps for optimal winter battery performance
Why Winter Is Hard on Car Batteries
Cold Slows Battery Chemistry
Reducing power output significantly
Higher Electrical Demand
Heaters, defrosters, and lights drain charge faster
Moisture & Corrosion
Build up more easily in cold, damp weather
Thicker engine oil
Makes it harder for the starter to turn over the engine
Test Your Battery, Starting, and Charging System
Before winter sets in, test your 12V battery and charging system to catch potential problems early. You can perform this yourself or visit a trusted repair shop.
Modern conductance testers are safe for batteries under 75% charge and range from $50–$400. Testing ensures your alternator, starter, and battery are ready to handle winter demands.
Clean & Protect Your Battery
A clean, corrosion-free connection is essential for strong starts and consistent performance. The Permatex Battery Care System — featuring Battery Cleaner #80369 and Battery Protector and Sealer #80370 — helps your battery perform at its best, even in freezing temperatures.
Clean
Ensure efficient power flow by removing dirt, corrosion, and grime.
- ✓ Spray Permatex Battery Cleaner #80369 generously over the battery and terminals
- ✓ Let it sit for 3 minutes. Rinse gently with water
- ✓ Repeat as needed, using a small wire brush for heavy buildup
Protect
Shield your terminals from future corrosion and extend battery life.
- ✓ Shake Permatex Battery Protector and Sealer #80370 for 1 minute
- ✓ Apply two thin coats to terminals and cable ends for a lasting, protective barrierr
Maintain a Healthy Charge
A clean, corrosion-free connection is essential for strong starts and consistent performance. The Permatex Battery Care System — featuring Battery Cleaner #80369 and Battery Protector and Sealer #80370 — helps your battery perform at its best, even in freezing temperatures. It's easy to maintain a healthy charge by following our tips below:
Drive regularly to keep your battery charged
Avoid short trips that don't allow the alternator to replenish power
Use a slow charger (2–4 amps) if your vehicle sits for long periods
Keep Your Battery Strong All Year Long
As temperatures drop, your vehicle’s electrical system faces one of its toughest challenges. Cold weather puts extra strain on your alternator and 12V battery as you rely more on the heating system, headlights, wipers, and other accessories. Thickened engine oil and lower battery capacity make it even harder to start your car.
All electrical power begins with the 12V battery — and with a little seasonal prep, you can keep it healthy and reliable all winter long. Always consult your vehicle’s Owner’s Manual for specific procedures related to battery sensors, radio locks, and other electrical systems.
With regular testing, cleaning, and protection, you can prevent most winter battery failures before they happen. Trust Permatex to help keep your vehicle’s electrical system reliable when temperatures drop.
Featured Products
Professional-grade battery care solutions from Permatex.
Permatex® Battery Protector & Sealer, 5 OZ
6 OZ aerosol can, 5 OZ net wt.
Permatex's Battery Protector & Sealer seals and coats battery terminals eliminating the formation of acid salt corrosion typically found when terminals are untreated. Use Permatex's Battery Protec...
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Permatex® Battery Cleaner, 5.75 OZ
6 OZ aerosol can, 5.75 OZ net wt.
Permatex Battery Cleaner works in just three minutes, allowing you to simply spray it on and wash corrosion off. Penetrates and removes corrosion, dirty and grime instantly.
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