[BrianG]

Originally Posted by Maciolus

25V

7*3.7= 25.9V
8*3.3= 26.4V

Don't forget that lipos are 4.2v/cell, or 29.4v on 7s - and A123s are 3.6v/cell or 28.8v on 8s. Some components may not like that even though the voltage will drop fairly quickly.