Pajero battery died at the car wash, need a reliable replacement ASAP

So I had one of those days where everything just goes wrong, starting with my Pajero refusing to start at the car wash in Al Barsha after they finished cleaning it. The guy had to push it out of the bay while everyone watched, and I felt like such an idiot standing there with my freshly washed car that wouldn't even move. I managed to get a jump from another customer, but I know I'm just delaying the inevitable because the battery has been struggling for a while now, especially on those hot afternoons when the car's been sitting in the sun. I've been doing some research online to figure out what my options are and I came across batteryzoneuae.com which seems to have a decent selection of batteries for Japanese cars. I'm wondering if anyone here has ordered from them or used a similar service and can tell me whether they actually deliver what they promise. I'm specifically looking for something that can handle the extreme heat here because I feel like that's what kills batteries so quickly. My last one barely made it two years and I'm tired of replacing them every other summer. Also, do they offer installation or just delivery? I'm not exactly handy with tools and I'd rather not mess up the connections or cause any electrical issues. I really need to get this sorted before the weekend because we're planning a family trip to Fujairah and the last thing I want is to get stranded on the highway with the kids in the car. Any honest feedback from people who've used them would be really helpful because I'm running out of time and I need to make a decision soon.