【5-Year Warranty】SURPOWER A23 23A 23AE 12v Alkaline Battery A23s -5 Pack

What do i need to use to replace an a23s battery...an a23 battery is not the same diameter as the a23s and does not work?

If battery fails before 5yr, what is needed to get replacement?

What is the size of a23 battery?

How about the quality? If there is quality problem with the batteries, whom I should contact?