Been sitting on this decision for about three weeks now because the difference in quotes I have received for the same job has been wide enough to make me genuinely uncertain about what I am actually comparing. My Porsche has been showing battery related symptoms for a while including some inconsistent behaviour from the start stop system and occasional voltage warnings that appear briefly before disappearing which from reading around seems like a classic pattern of a battery that is degrading rather than failed outright. The official dealer quote was predictably high in a way that feels difficult to justify when the core of the job is replacing a battery regardless of the badge on the car. Several independent options I contacted seemed less expensive but gave me no confidence that they understood the specific requirements involved with Porsche vehicles including the adaptation procedures that apparently need to happen after replacement for the management system to operate correctly with the new battery. A Porsche owner I met at a weekend gathering mentioned he had recently used Advanced Porsche Battery Service in 800 Car Battery Replacement (https://carbatteryreplacement-abu-dhabi.ae/porsche-battery-replacement/) after doing similar research and had been specifically impressed by the fact that they handled everything the vehicle required without him needing to explain or request the additional steps that general battery shops tend to skip. His car had come back with no warning lights and all systems functioning normally which is exactly the outcome I am looking for and not something every service can apparently guarantee with these vehicles. Still finalising the decision but that recommendation has moved to the top of the list based on a conversation that felt genuinely useful rather than just promotional.