Battery labels are full of acronyms — CCA, Ah, RC — that can be confusing. But knowing what they mean can help you choose a battery that really performs for your driving conditions in South Africa.

CCA (Cold Cranking Amps)

CCA is a measure of how much current (in amps) a battery can supply for 30 seconds at –18 °C (while maintaining a minimum voltage). :contentReference[oaicite:0]{index=0}

In practice, a higher CCA means your battery is better able to start the engine under cold or stressful conditions (thickened oil, heavy draw). :contentReference[oaicite:1]{index=1}

Ah (Ampere-Hours)

Ah — often given as 20-hour capacity — indicates how much current a battery can give over time. For example, a 50 Ah battery can (in theory) deliver 2.5 A for 20 hours (2.5 × 20 = 50) before its voltage falls too low. :contentReference[oaicite:2]{index=2}

Ah is a measure of energy storage. The higher the Ah (for similar types), the longer electrical loads (lights, radio, alarms) can run if the alternator is off or under high draw. :contentReference[oaicite:3]{index=3}

RC (Reserve Capacity)

RC tells you how long the battery can sustain a discharge load (often 25 A) before the battery voltage drops too low (for a 12 V battery usually ~10.5 V). :contentReference[oaicite:4]{index=4}

For instance, if a battery’s RC is 110 minutes, it means the battery can deliver 25 A continuously for 110 minutes before it cannot sustain sufficient voltage for operation. :contentReference[oaicite:5]{index=5}

Putting It All Together

• Start with CCA — ensures your car will reliably crank, especially in cooler times or under strain.
• Compare Ah & RC — these tell you how long your battery can support your car’s electrical systems during heavy use or if the alternator is under load.
• Always match or exceed the manufacturer’s specifications. Choosing a battery with higher CCA, Ah, or RC (within physical and terminal constraints) can add margin and reliability.

Need help interpreting a battery spec or choosing the right model? Pop in to Global Batteries Alberton, and we’ll test your options and fit the best match for your vehicle and usage.