Haven't seen any updated threads on this, but wanted to get some suggestions from everyone. I know they offer the fuel rods in WDW -- has anyone ever used those? I have a Galaxy s8 and a small Anker external charger that's at least 3 years old. I tried using it recently and it didn't give my phone a full charge, so looking for other options. Ideally something small I can fit in a purse. Also, I know they have charging stations around -- are they often all in use?