Is your battery running out at the Park? We recommend this charger, it charge your phone 6-8 times (full charges), it is amazing http://amzn.to/vEV5VF (MW benefits if you purchase)
#TIP Today I learned that the tax in DHS is a higher percentage than it is at MK or EPCOT (not sure where AK falls yet) since they are in different counties! I was a bit shocked! So to save a little money buy your non DHS exclusive merchandise at the other locations!