Mobile battery replacement

Mobile battery replacement vs driving to a shop – what do you guys prefer in Abu Dhabi?

I’ve got a 2015 Nissan Altima that’s been cranking slower each morning, and I’m trying to decide whether to call a mobile fitter or risk driving to a garage in Mussafah before the battery gives up completely. A friend said I should explore professional services that come to you because they can test the alternator on the spot, but I’ve also heard horror stories about mobile guys charging double for the same battery you’d get at a shop. Has anyone here tried both options around Khalifa City or Al Raha and found one clearly better? I don’t mind paying a bit extra for convenience, but I also don’t want to end up with a cheap battery that dies again in six months. Just trying to figure out what makes the most sense before I get stuck somewhere.