The Acura batteries are one of the smallest batteries used on SUV's. My Mercedes SUVs batteries were huge compared to the Acura, and I used 3 batteries (OEM and 3rd party) over the 108K miles that I put on each one of my ML SUVs. Smaller batteries normally have smaller reserves, which makes the Acura batteries very prone to discharge fast.
All my batteries only have lasted around 2 years here in Houston. Maybe because I always have my AC on (no pun intended), my fan high, and I like to use my stereo system loud. Here in Houston, TX, it is very hot and you normally need to run the AC and fan at max, which is not good when you are in rush hour traffic since the alternators only run at around %50 capacity around idle or less when the outside temperature becomes very hot, which can drain the battery if your overall electrical load is large. Knowing the these batteries don't like and are not designed to be deep cycled, it is not a surprise that they die fast, in my case.
With Acura, if you are in an emergency and the dealer is closed, you need to call Acura road side assistance first, if you want to have a refund. You need to bring the old battery, too.
On my 2011 MDX, I had to change the battery a couple of months ago because it just suddenly died at a parking lot. One of the battery cells seemed to have failed and the voltage was way below 12 volts and the battery load test showed it defective. My MDX has now around 45,000 miles.
2011 Pearl White MDX Advanced
... OEM towing, 20 mm wheel adapters,
... rails/crossbars, black wheel well trims,
... side windows acrylic deflectors,
... Michelin Latitude Diamaris HP 285/45R19,
... Full size spare tire,
... 6000 Kelvin HID's
2010 Acura TL Tech.
2001 Mercedes ML 320
2005 Mercedes ML 500 AMG Package