d_batt 21[mm] "Battery diameter"
h_batt 70[mm] "Battery height"
d_term 6[mm] "Terminal diameter"
h_term 1[mm] "Terminal thickness"
w_sc 3[mm] "Serial connector width"
h_sc 1[mm] "Serial connector height"
h_pc 0.5[mm] "Parallel connector height"
w_pc 1[mm] "Parallel connector width"
h_holder 10[mm] "Holder height"
gap 2[mm] "Gap between battery cylinders"
nx_batt 5 "Number of batteries in x direction"
ny_batt 4 "Number of batteries in y direction"
n_batt nx_batt*ny_batt "Number of batteries"
r_batt d_batt/2 "Battery radius"
r_term d_term/2 "Terminal radius"
x_disp d_batt+gap "x displacement for serially connected batteries"
y_disp x_disp*tan(60[deg])/2 "y displacement for batteries connected in parallel"
x_offset  (d_batt+gap)/2 "x displacement for batteries connected in parallel"