An old thread but just wanted to note I bought a Fuel Rod (finally - lol) just a couple of weeks ago while I was at Pop and it worked really well for me. Sometimes I'd charge my phone from the
scooter but many times when I wanted to charge it wasn't convenient (like raining or whatever). I took the Fuel Rod with me while eating and got a charge then. I also passed it along to my kids a couple of times when they needed a quick charge. It isn't a big battery but on the plus side it isn't heavy and there are a lot of kiosks so you can swap. All of the batteries I got as a replacement were in great condition. I like that it comes with 3 types of connectors so it fit everyone's devices. I brought the bigger battery packs but everyone wanted to use this one - lol.
Just wanted to also note I recently saw a DISPOSABLE charger (for iphones only) for about $5 at a local shop. It's something like this (and there are many other types on
amazon:
https://www.amazon.com/KICKCHARGE-Compatible-iPhone-Pre-Charged-Single-Use/dp/B07GGRNVQQ . I'm not advocating that brand - I didn't try any of them. Kind of interesting - kind of wasteful - maybe nice to keep for an emergency.