Subaru keeps the battery in plain sight. The flat boxer engine sits low, which leaves the battery easy to reach at the front corner of the engine bay. Most models use a conventional sealed battery in a Japanese size, so terminal position and case height matter: the wrong shape will not clamp down properly. No registration is needed afterwards. Recent models with Auto Start Stop are the exception on type, since they need a battery made for frequent restarts.
After a battery change a Subaru may need a few things taught again. The one-touch driver's window has to be reinitialised, and the engine computer relearns its idle over the first few minutes of running. A memory saver avoids most of this. Subarus in Dubai are often enthusiast cars or weekend camping cars, and both habits are hard on a battery: one sits for long spells, the other runs fridges and lights with the engine off.