We had bought a fuel rod a couple of trips ago.
One trip we were with family, so about 5 phones and four mini fans that all used the fuel rod. Every time I passed a exchange spot, I got a fresh one. No one ran out of power.
Last trip , two phones and one fan, I was at BLT. I forgot the charger. I had cords but I couldn't find any USB ports in the room. I used the power rod all week for most of our power needs. Again exchanged it when I could and always had something plugged in to it. I did have one large fully charged unit with me but only used it when in the room and the fuel rodl was empty.