My experience with motorcycle, ATV, & UTV batteries has not been positive, & that's using them as they are intended to be used. Thankfully, my two Honda ATVs are easy to kick start.
I bought a cheap 600A Lithium-ion jump starter (see below) last year. I keep it in the storage area of my Kawasaki Mule, which doesn't have an alternative method of starting. My Mule battery died for good earlier this winter, and I used the jump starter until I was able to replace the battery.
https://www.walmart.com/ip/Everstart...e&athbdg=L1100
I used the Lithium-ion jump starter on a 2003 Mercury Sable that wouldn't even crank last week. It had been parked for a long time, and my jump starter had been left in the cold for several weeks. It started the 6-cylinder Sable! I was impressed, because it's not much bigger than a cell phone. A simple cell phone charger charges it up, too. It's been a good $50 investment for me. If that small jump starter can start a 6-cylinder Sable, I'm confident it would do well with a Mirage.
I'm sure there are some good motorcycle/ATV batteries out there, but none of them have overly impressed me. I already have enough crappy batteries (add John Deere Riding lawnmower & 4WD Bolens G174 diesel tractor to my list) to deal with. The last thing I need is one of those in my Mirage. I wish my Mule used a car battery, and I think some guys have converted their machines to car batteries or cheaper lawnmower batteries.
My brother has a Honda UTV, & he has constant issues with batteries for that machine, too.
A factory Mirage battery in the States is only 356 CCA. You can buy a 340 CCA lawnmower battery at Walmart or a 350 CCA one at my local Farm & Fleet store. I'm sure they would start a Mirage.
I am going to Walmart to pick up a group size 35 battery when my factory battery dies. On a positive note, my 2011 Forester takes the same group size 35 battery.