Generalizes emp energy weapon drain to power cells

code/modules/power/cell.dm

@@ -128,7 +128,7 @@
 		rigged = 1 //broken batterys are dangerous
 
 /obj/item/weapon/cell/emp_act(severity)
-	charge -= 1000 / severity
+	charge -= maxcharge / severity
 	if (charge < 0)
 		charge = 0
 	if(reliability != 100 && prob(50/severity))

code/modules/projectiles/guns/alien.dm

@@ -36,9 +36,6 @@
 /obj/item/weapon/gun/launcher/spikethrower/update_icon()
 	icon_state = "spikethrower[spikes]"
 
-/obj/item/weapon/gun/launcher/spikethrower/emp_act(severity)
-	return
-
 /obj/item/weapon/gun/launcher/spikethrower/special_check(user)
 	if(istype(user,/mob/living/carbon/human))
 		var/mob/living/carbon/human/H = user

code/modules/projectiles/guns/energy.dm

@@ -19,9 +19,8 @@
 	var/charge_tick = 0
 
 /obj/item/weapon/gun/energy/emp_act(severity)
-	power_supply.use(round(power_supply.maxcharge / severity))
-	update_icon()
 	..()
+	update_icon()
 
 /obj/item/weapon/gun/energy/New()
 	..()

code/modules/projectiles/guns/projectile/crossbow.dm

@@ -62,10 +62,6 @@
 	var/obj/item/weapon/cell/cell = null    // Used for firing superheated rods.
 	var/current_user                        // Used to check if the crossbow has changed hands since being drawn.
 
-/obj/item/weapon/gun/launcher/crossbow/emp_act(severity)
-	if(cell && severity)
-		cell.use(100*severity)
-
 /obj/item/weapon/gun/launcher/crossbow/update_release_force()
 	release_force = tension*release_speed
 
@@ -148,8 +144,8 @@
 	if(istype(W, /obj/item/weapon/cell))
 		if(!cell)
 			user.drop_item()
-			W.loc = src
 			cell = W
+			cell.loc = src
 			user << "<span class='notice'>You jam [cell] into [src] and wire it to the firing coil.</span>"
 			superheat_rod(user)
 		else