Batteries - Car-Tech


Here at Car Tech Leighton Buzzard, we offer a free battery check that will show the condition of the battery. If required we offer a Battery Replacement & Fitting service.

Although batteries can be ordered from online platforms such as eBay it is still worth having this looked at by a garage first as there are many types of batteries with different specifications. We check the new batteries Cold Cranking Amps (CCA), Cranking Amps (CA) and Amp-Hours (AH) match or better the old battery insuring longevity. (for more information, please see below)

Regularly checking your car battery is crucial for several reasons:

Prevent unexpected breakdowns

A weakened or dead battery can leave you stranded, especially during inconvenient times or in harsh weather conditions. By proactively checking your battery, you can identify potential issues early and avoid the hassle and expense of a breakdown.

Ensure optimal performance

A healthy battery delivers consistent power, contributing to efficient engine starting, smooth electrical system operation, and improved fuel economy. Checking your battery helps maintain this optimal performance and prevents sluggish starts, flickering lights, or other issues.

Extend battery lifespan

Batteries naturally degrade over time, but proper care can significantly extend their lifespan. Regular checks allow you to detect problems like corrosion, electrolyte levels, or loose connections, addressing them before they cause permanent damage.

Maintain car value

A neglected battery can lead to major electrical problems down the line, impacting the car’s overall value and resale potential. Regular checks ensure your battery stays in good condition, contributing to a well-maintained vehicle.

Peace of mind

Knowing your battery is healthy provides peace of mind when you’re on the road, allowing you to drive with confidence and avoid the worry of potential breakdowns.

Helpful ways to check your car battery

  • Visual inspection: Look for signs of corrosion on the terminals, loose connections, or damage to the case.
  • Voltage test: Use a multimeter to measure the battery’s voltage (around 12.5 volts when fully charged). If you haven’t got a multimeter, then please feel free to book your free battery check online today (link to service bookings).
  • Load test: This test will have to be completed at Car Tech as it requires the correct equipment. It simulates the high current demand during engine starting to assess the battery’s health.
  • Start your car: Observe how easily the engine cranks. A sluggish start can indicate a weak battery.
Help understanding your vehicle battery Jargon
Cold Cranking Amps (CCA)

The discharge load in amperes that a new, fully charged battery can deliver at 0 degrees F for 30 seconds while maintaining a voltage of 1.20 volts/cell or higher. This measures the battery's ability to start (crank) an engine under low-temperature conditions where the chemical reaction inside the battery slows down: A battery puts out 100 percent of its rated power at 80 degrees F, 65 percent at 32 degrees, and only 40 percent at 0 degrees.

CCA is great for comparing battery performance in cold climate areas, but in hot climates lead-acid batteries with extremely high CCA ratings may actually have a shorter life than those with lower ratings: Within a given overall battery case (group) size, upping the CCA requires thinning out the internal plates to squeeze more out of them within the same case volume. Thinner plates are more susceptible to vibration and overheating.

Cranking Amps (CA)

The discharge load in amperes that a new, fully charged battery at 32 degrees F can continuously deliver for 30 seconds while maintaining a terminal voltage equal to or higher than 1.20 volts/cell. CA ratings can be misleading because they can be up to 30 percent higher than the equivalent CCA rating. The BCI requires that a battery carrying a statement of its CA performance must also list its CCA capacity.

How often should I service my car's air conditioning?

While there's no set schedule, it's generally recommended to have your AC system checked every 2 years for potential leaks, refrigerant level, and overall performance.

Reserve Capacity (RC)

If listed, this is the number of minutes a new, fully charged battery at 80 degrees F can be discharged at 25 amperes while maintaining a voltage of 1.75 volts/cell or higher. For a 12-volt battery (six cells), RC is the number of minutes it can maintain a voltage of 10.5 volts with a 25-amp draw; therefore, a "75-minute" battery lasts 75 minutes under these conditions. The bigger the RC, the better; modern cars with lots of accessories can see a current discharge rate much greater than 25 amps.

Amp-Hours (AH)

This one's a little tricky. Sometimes also known as the "C20" rating, usually you'll see this on a deep-cycle battery sticker. It's a measurement of how much energy a battery can deliver continuously for 20 hours at 80 degrees F without falling below 10.5 volts. If a battery is rated at 100 amps/hour, it will supply 100 amp/hours of power, or 5 amps/1 hour.

Date Code

Most batteries have a date code, usually a long string of numbers and letters that show when the battery was purchased. One row of one- or two-letter codes indicates the month, the other row of numbers is the last digit of the year. The relevant date code in the ID should have been stamped or highlighted at the time of purchase.

Group Size

This is the standard "envelope size" of the battery case that equates to its height, width, length, and terminal position.

Why choose Car Tech for a battery replacement

  • Competitive pricing
  • Diagnostic equipment to check battery health.
  • Same Day fitting (subject to availability)
  • Up to 5 years Warranty on selected batteries
  • Sourcing the correct battery for your car.
How does a car battery work?

A battery stores and releases electrical energy, using chemical reactions between sulphuric acid and lead paste within the plastic case.

Over time, the acid erodes the lead content and this reduces the battery's capacity. Batteries, therefore, cannot last indefinitely.

Before replacing a battery, we recommend that it is tested for its state of charge and state of health.

What are the signs of a failing car battery?

Difficulty starting the engine, dimming lights, sluggish electrical components, unusual smells, and corrosion around the terminals can all indicate a battery issue.

Can I jump-start a dead battery myself?

With caution and the right equipment, yes. Follow safety precautions and consult your owner's manual for specific instructions

Can I take my old battery to Car Tech for recycling?

Yes, we accept used car batteries for recycling. It's important to dispose of them properly due to environmental concerns.

What should I do if my car won't start due to a dead battery?

If you can safely jump-start it, follow proper procedures. Otherwise, call roadside assistance or if you are local please feel free to contact us.

What are the differences between different types of car batteries?

Common types include flooded, AGM, and gel batteries. Each has its own characteristics and suitability for different vehicles. Consult your owner's manual or contact us for guidance.

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