Nissan covers both ends of Dubai motoring. The Sunny, Kicks and Sentra run small batteries that suit a light engine but have little reserve, so a week of short trips with the AC on can leave them flat. The Patrol sits at the other end, with a big petrol engine, rear air conditioning and often extra lights or a fridge socket. It needs a battery with high cranking power, and an undersized one will struggle by the first hot month.
Many Nissans built from the late 2000s have a small current sensor on the negative battery cable. The engine computer uses it to decide how hard the alternator should charge. The technician leaves that sensor in place and connects the clamp exactly as it was. Most models need no registration after a battery change, though the idle may take a short drive to settle. A memory saver is used so the radio, clock and window settings survive.