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diff --git a/game/client/portal/c_prop_energy_ball.cpp b/game/client/portal/c_prop_energy_ball.cpp
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+++ b/game/client/portal/c_prop_energy_ball.cpp
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+//	c_prop_energy_ball.cpp
+// 
+// Purpose: Portal version of the combine ball. This client code is needed to provide a different
+//			look when the energy ball has infinite life and to have modified client effects.
+//
+//=====================================================================================//
+
+
+#include "cbase.h"							// precompiled headers
+#include "c_prop_combine_ball.h"			// Our parent class
+#include "clienteffectprecachesystem.h"		// To precache our new material
+
+ConVar cl_energy_ball_start_fade_time ( "cl_energy_ball_start_fade_time", "8", FCVAR_CHEAT );
+
+//-----------------------------------------------------------------------------
+// Purpose: Portal version of a combine ball
+//-----------------------------------------------------------------------------
+class C_PropEnergyBall : public C_PropCombineBall
+{
+public:
+	DECLARE_CLASS( C_PropEnergyBall, C_PropCombineBall );
+	DECLARE_CLIENTCLASS();
+	DECLARE_PREDICTABLE();
+
+	C_PropEnergyBall();
+
+	virtual void	OnDataChanged( DataUpdateType_t updateType );
+
+protected:
+	bool InitMaterials();
+
+	bool	m_bIsInfiniteLife;			// if this energy ball is an infinite life variety
+	float	m_fTimeTillDeath;			// If this is a finite life energy ball, the time remaining until detonation
+	float	m_fCurAlpha;				// The amount of alpha to apply at DrawModel, to simulate a decaying energy ball
+};
+
+LINK_ENTITY_TO_CLASS( prop_energy_ball, C_PropEnergyBall );
+
+// precache our different materials for the infinite life energy balls
+CLIENTEFFECT_REGISTER_BEGIN( PrecacheEffectEnergyBall )
+
+	CLIENTEFFECT_MATERIAL( "effects/eball_infinite_life" )
+	CLIENTEFFECT_MATERIAL( "effects/eball_finite_life" )
+
+CLIENTEFFECT_REGISTER_END()
+
+
+IMPLEMENT_CLIENTCLASS_DT( C_PropEnergyBall, DT_PropEnergyBall, CPropEnergyBall )
+
+	RecvPropBool( RECVINFO( m_bIsInfiniteLife ) ),
+	RecvPropFloat( RECVINFO( m_fTimeTillDeath ) ),
+
+END_RECV_TABLE()
+
+
+BEGIN_PREDICTION_DATA( C_PropEnergyBall )
+
+	DEFINE_PRED_FIELD( m_bIsInfiniteLife, FIELD_BOOLEAN, FTYPEDESC_INSENDTABLE ),
+	DEFINE_PRED_FIELD( m_fTimeTillDeath, FIELD_FLOAT, FTYPEDESC_INSENDTABLE ),
+
+END_PREDICTION_DATA()
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+C_PropEnergyBall::C_PropEnergyBall(): m_bIsInfiniteLife(false), m_fTimeTillDeath(-1), m_fCurAlpha ( 1.0f )
+{
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Flag our data as new this frame
+// Input  : DataUpdateType_t, either created or updated
+// Output : void
+//-----------------------------------------------------------------------------
+void C_PropEnergyBall::OnDataChanged(DataUpdateType_t updateType )
+{
+	BaseClass::OnDataChanged( updateType );
+
+	// If our data changed this frame, then operate based on it next think
+	if ( updateType == DATA_UPDATE_DATATABLE_CHANGED )
+	{
+		float fStartFadeTime = cl_energy_ball_start_fade_time.GetFloat();
+
+		if ( fStartFadeTime < 1.0f )
+		{ 
+			fStartFadeTime = 1.0f;
+		}
+
+		// The last x seconds of life, fade
+		if ( (m_fTimeTillDeath > 0.0f) )
+		{
+			float fNewAlpha = m_fTimeTillDeath / fStartFadeTime;
+			clamp( fNewAlpha, 0.0f, 1.0f );
+			m_fCurAlpha = fNewAlpha;
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Use our custom body materials for energy ball, but otherwise use the base class materials (base being C_PropCombineBall)
+// Output : bool
+//-----------------------------------------------------------------------------
+bool C_PropEnergyBall::InitMaterials()
+{
+	// Use the same materials as a combine ball
+	bool bRetVal = BaseClass::InitMaterials();
+
+	// If we're an infinite life combine ball, swap out the body material (and the base implementation didnt fail)
+	IMaterial* pBodyMat;
+	if ( m_bIsInfiniteLife )
+	{
+		pBodyMat = materials->FindMaterial( "effects/eball_infinite_life", NULL, false );
+	}
+	else
+	{
+		pBodyMat = materials->FindMaterial( "effects/eball_finite_life", NULL, false );
+	}
+
+	// If we can find our custom material, use it.
+	if ( pBodyMat == NULL )
+	{
+		bRetVal = false;
+	}
+	else
+	{
+		m_pBodyMaterial = pBodyMat;
+		m_pBodyMaterial->AlphaModulate( m_fCurAlpha );
+	}
+
+	return bRetVal;
+}
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