OnTriggerEnter No effect

enter code herei have used capsule collider on the battery and checked IsTrigger box
The code below is part of playercollision script where on collision i want the effects to take place but nothing is happening

function OnTriggerEnter(collisionInfo : Collider)
{	
 if(collisionInfo.gameObject.tag == "battery")
 {	
  BatteryCollect.charge++;		
  audio.PlayOneShot(batteryCollect);		
  Destroy(collisionInfo.gameObject);		
 }
}

Did you added a rigidbody into the mesh that you are trying to collide with your battery?