This was my fault. I didn't pay attention to the fan blade size. I purchased one very similar last year which was amazing. I do not yet know the battery life per charge but I suspect it is great like my last fan. I unfortunately gave that fan to a friend who lives in Jamaica after the latest hurricane.
While I'm sure the longevity of this per charge is more than good, likely 16 hours, I do regret not looking at the blade speed. I've been in Florida since Beryl almost two years ago and it's already getting hot and humid. While this will have to do for a while, I'm going to give it a month and possibly order something with an 8 inch fan blade. I was a little spoiled by my first fan, had this been my first purchase, I'm sure I would be thrilled.
I bought the 30,000 mah battery, you are going to want at least that size, possibly more as they do have a 40,000 mah and if there is potential for a power outage in hot weather, the more the better.