What's the 2016 acura rdx battery size?

Your 2016 Acura RDX will, unfortunately, require a new battery from time to time -- they don't last forever. In Your case, they can be quite pricey, as the group sizeS35, 24F, or 24R (depending on configuration and preference) can run anywhere from $80 up to over $250, plus installation if applicable. Cold cranking amps is another conversation to have. It's recommended that You stick with something above 600 CCA at a MINImum -- closer to 700 if You're in a cold climate. While that'll incur You an additional expense, it's well worth the peace of mind knowing that You won't be stranded without the ability to start Your RDX -- at least, with a reasonable degree of certainty.