diff --git a/src/resonantinduction/base/SetUtil.java b/src/resonantinduction/base/SetUtil.java
index 67dad1f7..740ff1ec 100644
--- a/src/resonantinduction/base/SetUtil.java
+++ b/src/resonantinduction/base/SetUtil.java
@@ -59,6 +59,11 @@ public class SetUtil
 		return toReturn;
 	}
 	
+	/**
+	 * Copies a set.
+	 * @param set - set to copy
+	 * @return copied set
+	 */
 	public static <V> Set<V> copy(Set<V> set)
 	{
 		Set<V> toReturn = new HashSet<V>();
@@ -145,6 +150,11 @@ public class SetUtil
 		return toReturn;
 	}
 	
+	/**
+	 * Gets the top object in a set.
+	 * @param set - set to get the object from
+	 * @return top object in the set
+	 */
 	public static <V> V getTop(Set<V> set)
 	{
 		for(V obj : set)
diff --git a/src/resonantinduction/battery/BatteryUpdateProtocol.java b/src/resonantinduction/battery/BatteryUpdateProtocol.java
index 5f19ff35..a30c459c 100644
--- a/src/resonantinduction/battery/BatteryUpdateProtocol.java
+++ b/src/resonantinduction/battery/BatteryUpdateProtocol.java
@@ -219,11 +219,17 @@ public class BatteryUpdateProtocol
 		{
 			ArrayList<Set<ItemStack>> inventories = SetUtil.split(oldStructure.inventory, iteratedNodes.size());
 			List<TileEntityBattery> iterList = SetUtil.asList(iteratedNodes);
+			boolean didVisibleInventory = false;
 			
 			for(int i = 0; i < iterList.size(); i++)
 			{
 				TileEntityBattery tile = iterList.get(i);
 				tile.structure = SynchronizedBatteryData.getBase(tile, inventories.get(i));
+				
+				if(!didVisibleInventory)
+				{
+					tile.structure.visibleInventory = oldStructure.visibleInventory;
+				}
 			}
 		}
 	}
@@ -258,6 +264,12 @@ public class BatteryUpdateProtocol
 				TileEntityBattery tileEntity = (TileEntityBattery)obj.getTileEntity(pointer.worldObj);
 				
 				structureFound.inventory = SetUtil.merge(structureFound.inventory, tileEntity.structure.inventory);
+				
+				if(tileEntity.structure.hasVisibleInventory())
+				{
+					structureFound.visibleInventory = tileEntity.structure.visibleInventory;
+				}
+				
 				tileEntity.structure = structureFound;
 			}
 			
diff --git a/src/resonantinduction/battery/SynchronizedBatteryData.java b/src/resonantinduction/battery/SynchronizedBatteryData.java
index 78e5f102..c0ca748c 100644
--- a/src/resonantinduction/battery/SynchronizedBatteryData.java
+++ b/src/resonantinduction/battery/SynchronizedBatteryData.java
@@ -14,6 +14,11 @@ public class SynchronizedBatteryData
 	
 	public Set<ItemStack> inventory = new HashSet<ItemStack>();
 	
+	/**
+	 * Slot 0: Cell input slot
+	 * Slot 1: Battery charge slot
+	 * Slot 2: Battery discharge slot
+	 */
 	public ItemStack[] visibleInventory = new ItemStack[3];
 	
 	public int length;
@@ -26,6 +31,8 @@ public class SynchronizedBatteryData
 	
 	public boolean didTick;
 	
+	public boolean wroteVisibleInventory;
+	
 	public int getVolume()
 	{
 		return length*width*height;
@@ -67,6 +74,19 @@ public class SynchronizedBatteryData
 		}
 	}
 	
+	public boolean hasVisibleInventory()
+	{
+		for(ItemStack itemStack : visibleInventory)
+		{
+			if(itemStack != null)
+			{
+				return true;
+			}
+		}
+		
+		return false;
+	}
+	
 	public static SynchronizedBatteryData getBase(TileEntityBattery tileEntity, Set<ItemStack> inventory)
 	{
 		SynchronizedBatteryData structure = getBase(tileEntity);
diff --git a/src/resonantinduction/battery/TileEntityBattery.java b/src/resonantinduction/battery/TileEntityBattery.java
index d8b2686e..e6d06fcf 100644
--- a/src/resonantinduction/battery/TileEntityBattery.java
+++ b/src/resonantinduction/battery/TileEntityBattery.java
@@ -82,6 +82,7 @@ public class TileEntityBattery extends TileEntityBase implements IPacketReceiver
     {
         super.readFromNBT(nbtTags);
         
+        //Main inventory
         NBTTagList tagList = nbtTags.getTagList("Items");
         structure.inventory = new HashSet<ItemStack>();
 
@@ -91,6 +92,24 @@ public class TileEntityBattery extends TileEntityBase implements IPacketReceiver
 
             structure.inventory.add(ItemStack.loadItemStackFromNBT(tagCompound));
         }
+        
+        //Visible inventory
+        if(nbtTags.hasKey("VisibleItems"))
+        {
+	        NBTTagList tagList1 = nbtTags.getTagList("VisibleItems");
+	        structure.visibleInventory = new ItemStack[3];
+	
+	        for(int tagCount = 0; tagCount < tagList1.tagCount(); tagCount++)
+	        {
+	            NBTTagCompound tagCompound = (NBTTagCompound)tagList1.tagAt(tagCount);
+	            byte slotID = tagCompound.getByte("Slot");
+	
+	            if(slotID >= 0 && slotID < structure.visibleInventory.length)
+	            {
+	                setInventorySlotContents(slotID, ItemStack.loadItemStackFromNBT(tagCompound));
+	            }
+	        }
+        }
     }
 
 	@Override
@@ -98,6 +117,7 @@ public class TileEntityBattery extends TileEntityBase implements IPacketReceiver
     {
         super.writeToNBT(nbtTags);
         
+        //Inventory
         NBTTagList tagList = new NBTTagList();
 
         for(ItemStack itemStack : structure.inventory)
@@ -111,6 +131,26 @@ public class TileEntityBattery extends TileEntityBase implements IPacketReceiver
         }
 
         nbtTags.setTag("Items", tagList);
+        
+        //Visible inventory
+        if(!structure.wroteVisibleInventory)
+        {
+	        NBTTagList tagList1 = new NBTTagList();
+	
+	        for(int slotCount = 0; slotCount < structure.visibleInventory.length; slotCount++)
+	        {
+	            if(getStackInSlot(slotCount) != null)
+	            {
+	                NBTTagCompound tagCompound = new NBTTagCompound();
+	                tagCompound.setByte("Slot", (byte)slotCount);
+	                getStackInSlot(slotCount).writeToNBT(tagCompound);
+	                tagList1.appendTag(tagCompound);
+	            }
+	        }
+	
+	        nbtTags.setTag("VisibleItems", tagList1);
+	        structure.wroteVisibleInventory = true;
+        }
     }
 	
 	public void update()
@@ -246,9 +286,32 @@ public class TileEntityBattery extends TileEntityBase implements IPacketReceiver
 	}
 
 	@Override
-	public ItemStack decrStackSize(int i, int j) 
+	public ItemStack decrStackSize(int slotID, int amount) 
 	{
-		return null;
+        if(getStackInSlot(slotID) != null)
+        {
+            ItemStack tempStack;
+
+            if(getStackInSlot(slotID).stackSize <= amount)
+            {
+                tempStack = getStackInSlot(slotID);
+                setInventorySlotContents(slotID, null);
+                return tempStack;
+            }
+            else {
+                tempStack = getStackInSlot(slotID).splitStack(amount);
+
+                if(getStackInSlot(slotID).stackSize == 0)
+                {
+                	setInventorySlotContents(slotID, null);
+                }
+
+                return tempStack;
+            }
+        }
+        else {
+            return null;
+        }
 	}
 
 	@Override