diff --git a/zscript.zs b/zscript.zs
index d761318..7e38f1a 100644
--- a/zscript.zs
+++ b/zscript.zs
@@ -8,6 +8,7 @@ const jumperCablesFixRange     = 48; // Maximum distance to a broken linedef to
 class JumperCablesMapLoader : EventHandler
 {
     Map<int, int> originalLinedefSpecials2;
+    Array<JumperCablesDeployed> deployedCables;
 
     static JumperCablesMapLoader Get()
     {
@@ -20,28 +21,62 @@ class JumperCablesMapLoader : EventHandler
     {
         JumperCablesMapLoader loader = Get();
 
+        // Clear out anything from the last level.
+        deployedCables.Clear();
         loader.originalLinedefSpecials2.Clear();
 
-        // Console.printf("butt\n");
-        // Console.printf("butt %s\n", level.MapName);
-        // Console.printf("linedefs %d\n", level.Lines.size());
-
+        // Go through all the linedefs and make note of what they're
+        // supposed to do.
         for(int k = 0; k < level.Lines.size(); k++) {
             Line line = level.Lines[k];
-
             if(line.special != 0) {
-                // Console.printf("  %d = %d\n", line.index(), line.special);
                 loader.originalLinedefSpecials2.Insert(line.index(), line.special);
             }
         }
+    }
 
+    override void WorldLineActivated(WorldEvent e)
+    {
+        // TODO: Deplete batteries.
+        Console.printf("Line activated: %d %d\n", e.ActivatedLine.index(), e.ActivatedLine.special);
+
+        for(int cableIndex = 0; cableIndex < deployedCables.size(); cableIndex++) {
+            if(deployedCables[cableIndex].lineDefIndex == e.ActivatedLine.index()) {
+
+                deployedCables[cableIndex].DecrementBattery();
+
+                break;
+            }
+        }
+    }
+
+    void RegisterCables(JumperCablesDeployed cableActor)
+    {
+        if(deployedCables.Find(cableActor) == deployedCables.size()) {
+            deployedCables.Push(cableActor);
+
+            // FIXME: Remove this.
+            Console.printf("Cables registered %d\n", deployedCables.size());
+        }
+    }
+
+    void UnregisterCables(JumperCablesDeployed cableActor)
+    {
+        Console.printf("UNREGISTERING\n");
+        int index = deployedCables.find(cableActor);
+        if(index != deployedCables.size()) {
+            deployedCables.delete(index);
+
+            // FIXME: Remove this.
+            Console.printf("Cables unregistered %d\n", deployedCables.size());
+        }
     }
 }
 
-
 class JumperCablesDeployed : HDUPK
 {
     int lineDefIndex;
+    int charges;
 
     default
     {
@@ -50,32 +85,54 @@ class JumperCablesDeployed : HDUPK
     states
     {
     spawn:
-        DERP A -1 {
+        DERP A -1 nodelay {
             invoker.bNoGravity = true;
+
+            // Register us with the global event handler so we can
+            // respond to the linedef getting used.
+            JumperCablesMapLoader loader = JumperCablesMapLoader.Get();
+            loader.RegisterCables(self);
         }
         stop;
     give:
-        DERP A 0 {
-            Console.printf("yoink\n");
-            // Re-break the line.
-            level.Lines[lineDefIndex].special = 0;
-            Destroy();
-        }
+        DERP A 0;
         goto spawn;
     }
 
-    override bool OnGrab(Actor grabber)
+    void DecrementBattery()
+    {
+        charges -= 1;
+        Console.printf("battery used, now: %d", charges);
+        if(charges <= 0) {
+            DespawnToBattery();
+        }
+    }
+
+    void DespawnToBattery()
     {
         // Re-break the linedef.
         level.Lines[lineDefIndex].special = 0;
 
-        // TODO: Spawn a battery.
+        // Spawn a battery, with the same level of charge.
+        HDMagAmmo.SpawnMag(self, "HDBattery", self.charges);
+
         // TODO: Spawn debris.
 
-        Console.printf("NO!\n");
+        JumperCablesMapLoader loader = JumperCablesMapLoader.Get();
+        loader.UnregisterCables(self);
+
         Destroy();
+    }
+
+    override bool OnGrab(Actor grabber)
+    {
+        DespawnToBattery();
         return false;
     }
+
+    // TODO: Tick function where we add sparks and stuff?
+    // TODO: Tick function where we set the sprite to indicate the charge level.
+    // TODO: Despawn if the sector gets broken *again*?
 }
 
 class JumperCablesUsable : HDWeapon
@@ -314,6 +371,13 @@ class JumperCablesUsable : HDWeapon
 
     action void AttachCables(HDPlayerPawn pawn)
     {
+        HDMagAmmo batteryAmmo = HDMagAmmo(FindInventory("HDBattery"));
+
+        if(!batteryAmmo || batteryAmmo.amount < 1) {
+            invoker.owner.A_Log("You need a battery to use this.");
+            return;
+        }
+
         JumperCablesMapLoader loader = JumperCablesMapLoader.Get();
         FLineTraceData linetraceData;
         DoLineTrace(pawn, linetraceData);
@@ -332,10 +396,18 @@ class JumperCablesUsable : HDWeapon
 
                 if(originalSpecial != currentSpecial) {
 
+                    // Remove battery from inventory.
+                    int batteryCharges = batteryAmmo.TakeMag(true);
+                    Console.printf("batteryCharges: %d", batteryCharges);
+
                     JumperCablesDeployed deployed = JumperCablesDeployed(
-                        Spawn("JumperCablesDeployed", linetraceData.hitLocation));
+                        Spawn(
+                            "JumperCablesDeployed",
+                            linetraceData.hitLocation - linetraceData.hitDir * 8));
+
                     deployed.lineDefIndex = brokenLine.index();
                     deployed.bNoGravity = true;
+                    deployed.charges = batteryCharges;
 
                     brokenLine.special = originalSpecial;
                 }