clear all 
close all
clc

vRealTime   = 2.3 ;

D           = .35  ;
capV        = 3.7 ;         % capacitor voltage
C           = 4.7*10^-6;    % capacitor capacity

Eorg        = 1/2*C*capV^2 
ErealTime   = 1/2*C*vRealTime^2

Erequired   = D*Eorg

Dcor        = Erequired/ErealTime

Vnew        = sqrt((1-D)*Eorg*2/C)