Toys R Us has batteries on sale, Buy 1 Get 1 Free this week, making for some great deals on batteries! You can opt to pick them up in the store, or get them shipped for free when you use your Shoprunner account! It is pretty rare when hot deals like these qualify for free shipping, so I would grab this offer while you can!
As a reminder, Shoprunner is an on-line site which offers free shipping (and returns) to select merchants. You can actually try it for free for 30 days and then if you want to continue, it is just $79 a year. The cost of the membership can quickly pay for itself in saved shipping charges, especially if you do a lot of on-line shopping! Sign up for your free trial offer over at Shoprunner.