Heat is the real enemy
High temperatures speed up the chemical reactions inside a lead-acid battery, which wears it out faster. Underbonnet temperatures in a parked car in summer can be far above the air temperature. The result is that batteries in the UAE commonly last less time than in cooler climates.
Why the failure often shows up later
A heat-damaged battery can keep starting the car through summer, then fail on the first cooler morning, because cooler weather asks the battery for more power at start-up. So the damage is done in summer and the failure shows up afterwards.
Warning signs
Watch for any of these:
- Slow cranking or a clicking noise on start
- Dim headlights or flickering dashboard
- A battery warning light
- Needing a jump start
- A battery that is three or four years old or more
- Corrosion around the terminals
What you can do
Get the battery load-tested before summer and again after. A test takes little time and tells you how much life is left. Keep terminals clean and tight, and avoid leaving lights or accessories on. If you leave the car parked for long periods, tell your mechanic so they can check for a parasitic drain.
Some modern cars need the new battery registered with the car's computer after replacement. Make sure whoever fits it does this where required.
Published 2026-11-07. General advice only; every vehicle is different, so ask us about yours.