For a limited time, buy one pack of Toys R Us branded alkaline batteries at ToysRUs.com and get a second pack of equal or lesser value for free. For example, if you purchased the 20 Pack of Toys R Us AA Ultra Alkaline Batteries, which drop from $9.99 to $6.99, you could get a second pack for free. That's only $6.99 for 40 batteries! Shipping is around $6 or free with $49. In store pickup is also free. Sales tax is charged in most states.