This isn't bad but the 5damage charges may be a bit high. Here is why I say this.
Unupgraded
With 1 Battery + 6 lighting bolts = 60 damage for 18

(5

battery cost + 12

spell cost + 1

activation cost)
With 2 Batteries + 6 lighting blots = 90 damage for 24

(10

battery cost + 12

spell cost + 2

activation cost)
With 3 Batteries + 6 lighting blots = 120 damage for 30

(15

battery cost + 12

spell cost + 3

activation cost)
With 4 Batteries + 6 lighting blots = 150 damage for 36

(20

battery cost + 12

spell cost + 4

activation cost)
With 5 Batteries + 6 lighting blots = 180 damage for 42

(25

battery cost + 12

spell cost +5

activation cost)
With 6 Batteries + 6 lighting blots = 210 damage for 48

(30

battery cost + 12

spell cost + 6

activation cost)
Upgraded
With 1 Capacitator + 6 lighting blots = 60 damage for 11

(4

battery cost + 6

spell cost + 1

activation cost)
With 2 Capacitator + 6 lighting blots = 90 damage for 16

(8

battery cost + 6

spell cost + 2

activation cost)
With 3 Capacitator + 6 lighting blots = 120 damage for 21

(12

battery cost + 6

spell cost + 3

activation cost)
With 4 Capacitator + 6 lighting blots = 150 damage for 26

(16

battery cost + 6

spell cost + 4

activation cost)
With 5 Capacitator + 6 lighting blots = 180 damage for 31

(20

battery cost + 6

spell cost + 5

activation cost)
With 6 Capacitator + 6 lighting blots = 210 damage for 36

(24

battery cost + 6

spell cost + 6

activation cost)
Now this is only the 12 cards listed and if more spells are cast(I'm assuming by either player) then the damage will go that much higher.