I was looking at getting a second charger but before I drop $45 on one I wanted to see what the pros and cons are on the parrellel chargers. I'm thinking it will work but will take twice as long with 2 batteries and three times as long with 3 batteries. The charger can only put out so much power to charge so it should take longer the more batteries you add is my guess. Therefore your not gaining anything. Am I wrong??? Thanks.