Why UAE heat cuts battery life to 24-36 months
Lead-acid batteries age through chemistry, and chemistry runs faster when it is hot. As a working rule, every 8-10 degrees Celsius above the design temperature roughly doubles the rate of internal grid corrosion and water loss. An engine bay in stationary August traffic on Sheikh Zayed Road sits comfortably above 70 degrees. That is why the same battery brand that carries a five-year reputation in Europe is realistically a two-to-three-year consumable here, and why every experienced fleet manager in the Gulf budgets for it that way.
The damage is done in summer but the failure often shows up later, because a heat-weakened battery can still start a warm engine. What it cannot do is deliver full cranking current after the car has sat for a week, or carry the electrical load of a cabin pre-cool with the engine off. Short urban trips make it worse: five kilometres to the school gate with the AC blower on full never puts back what the starter took out, so the battery lives permanently half-charged and sulphates from the inside.