Getting the spec right: size, terminals and cranking amps
Beyond chemistry, three physical details decide whether a battery fits and performs. First, the case size, quoted as a DIN code (European cars, e.g. DIN 66 or LN3) or a JIS code (Japanese and Korean cars, e.g. 80D26L). The tray, the hold-down clamp and the bonnet clearance are all built around that code, and a battery one size up that cannot be clamped down properly is a hazard, not an upgrade. Second, terminal layout: the L in 80D26L means the positive post sits on the left, and the leads on most cars will not stretch to the wrong side. Third, terminal type: Japanese thin posts and European standard posts are different diameters, and a clamp forced onto the wrong post never makes reliable contact.
On capacity, UAE buyers tend to over-focus on cold cranking amps, a figure invented for Scandinavian winters. In the Gulf, amp-hours and reserve capacity matter more, because the real workload is running electronics and blower fans through long idles and traffic crawls in 45-degree heat. Matching or slightly exceeding the original Ah rating is the right move; chasing the biggest CCA number on the shelf is marketing, not engineering.