diff --git a/src/core/actions/EndTurnAction.ts b/src/core/actions/EndTurnAction.ts
index b55252b..39b8d5f 100644
--- a/src/core/actions/EndTurnAction.ts
+++ b/src/core/actions/EndTurnAction.ts
@@ -21,6 +21,10 @@ module TK.SpaceTac {
         getActionPointsUsage(ship: Ship, target: Target | null): number {
             let toggled_cost = isum(imap(ship.iToggleActions(true), action => action.power));
             let power_diff = ship.getAttribute("power_generation") - toggled_cost;
+            let power_excess = ship.getValue("power") + power_diff - ship.getAttribute("power_capacity");
+            if (power_excess > 0) {
+                power_diff -= power_excess;
+            }
             return -power_diff;
         }
 
diff --git a/src/ui/battle/ActionIcon.spec.ts b/src/ui/battle/ActionIcon.spec.ts
index affb7a0..49bcf80 100644
--- a/src/ui/battle/ActionIcon.spec.ts
+++ b/src/ui/battle/ActionIcon.spec.ts
@@ -14,10 +14,19 @@ module TK.SpaceTac.UI.Specs {
             icon.refresh();
             check.same(icon.img_power.visible, false, "no change");
 
-            check.patch(action, "getActionPointsUsage", () => 3);
+            let cost = 3;
+            check.patch(action, "getActionPointsUsage", () => cost);
             icon.refresh();
-            check.equals(icon.img_power.visible, true);
-            check.equals(icon.text_power.text, "3");
+            check.in("power cost = 3", check => {
+                check.equals(icon.img_power.visible, true);
+                check.equals(icon.text_power.text, "3\n-");
+            });
+            cost = -2;
+            icon.refresh();
+            check.in("power cost = -2", check => {
+                check.equals(icon.img_power.visible, true);
+                check.equals(icon.text_power.text, "2\n+");
+            });
         })
 
         test.case("displays disabled and fading states", check => {
diff --git a/src/ui/battle/ActionIcon.ts b/src/ui/battle/ActionIcon.ts
index 721d698..aeee1a3 100644
--- a/src/ui/battle/ActionIcon.ts
+++ b/src/ui/battle/ActionIcon.ts
@@ -68,7 +68,7 @@ module TK.SpaceTac.UI {
             this.img_power.anchor.set(0.5);
             this.img_power.visible = false;
             this.container.addChild(this.img_power);
-            this.text_power = new Phaser.Text(bar.game, 0, 0, "", { align: "left", font: "16pt SpaceTac", fill: "#ffdd4b" });
+            this.text_power = new Phaser.Text(bar.game, 0, 4, "", { align: "left", font: "16pt SpaceTac", fill: "#ffdd4b" });
             this.text_power.setShadow(1, 1, "#000000");
             this.text_power.anchor.set(0.5);
             this.img_power.addChild(this.text_power);
@@ -206,10 +206,10 @@ module TK.SpaceTac.UI {
             }
 
             // left
-            let power = this.action.getActionPointsUsage(this.ship, null);
-            this.img_power.visible = bool(power);
-            this.text_power.text = `${Math.abs(power)}`;
-            this.text_power.fill = (power > 0) ? "#ffdd4b" : "#dbe748";
+            let cost = this.action.getActionPointsUsage(this.ship, null);
+            this.img_power.visible = bool(cost);
+            this.text_power.text = `${Math.abs(cost)}\n${cost < 0 ? "+" : "-"}`;
+            this.text_power.fill = (cost > 0) ? "#ffdd4b" : "#dbe748";
             this.text_power.alpha = disabled ? 0.2 : 1;
             if (disabled != this.disabled || selected != this.selected || toggled != this.toggled) {
                 if (disabled) {