I recently bought the xtar VP1 on a whim even though my Pila worked fine. I've been using the VP1 since I received it and today noticed that the springs I compress when inserting the batteries into the charger are so powerful that they have inflicted a substantial indentation in the bottom of most of my AW batteries. I don't like that at all. Charger worked fine otherwise but didn't do anything my Pila wouldn't do more gently.