Hi Lisa! As someone who has to have a backup battery to my backup battery for my mobile phone, I am a big fan of the
Portable Phone Charging Systems!
When fully charged, they provide up to 8 hours of talk time or 4 hours on a mobile tablet.
In my opinion, they are worth every penny as I have become so dependent on my cell phone.
I would also suggest that you review the various apps you have on your mobile device and determine which ones have the highest battery usage. If there are any you can turn off or disable during your vacation, I highly recommend it. I did this during my last vacation at Walt Disney World Resort and the performance of my battery was significantly better. I also found out that some of those apps I felt I couldn't live without weren't actually that important to my daily routine so this carried over into my day to day cell phone usage.
The charging systems come with a cord so once you are back at your Resort hotel, you can recharge it and use it the next day. If you find yourself without a brick, plug the cord and portable battery into your TV for the night and it should be back to 100% by morning.
Thank you so much for sharing your question with the Disney Parks Moms Panel! Please let us know if you need any other tips as you plan your magical Walt Disney World Resort vacation!