One has to define "most powerful" but the largest to my knowledge is the BCI (Battery Council International) Group 8D. There may be larger special purpose batteries available but the 8D is the largest you're likely to find at any battery, marine, and truck supplier.Even in very large storage situations like ships the practice is to use many 8D batteries. Anything larger is too difficult to be handled by a person as 8D batteries are approximately 140lbs.
-8d + 8d = 0
Hexidecimal
11
8d = 5d+18 8d-5d = 18 3d = 18 d = 6
8D in Mathematics is a site offering classes in ABACUS Math.
8d-3d =65 plus work
8 Days a Week A person that says they are working 8 Days a Week means that they are working harder than anyone else. (Not enough hours in the day to do other things).
Regular flooded lead acid weigh between 120-130 pounds and gel configurations between 150-160 depending on manufacturer.
d2 + 8d + 7 = (d + 7) (d + 1)
2d + 11e +8d + 11e = 10d + 22e
8d