1st and 2nd speeds are not too strong but 3rd is decently impressive. So far works well and battery can hold charge

I got these to give to my kids for a family Christmas cruise. Perfect size to be packable and portable. Will work great in stateroom onboard.

This is the second fan I have ordered because we loved the first one so much and unfortunately the second fan we received did not have a place to put in a rechargeable battery like the first fan we got. it is only chargeable by a USB-C cord. I would have much preferred having the fan that takes a battery because it lasts longer. Overall it is still a great fan.

The media could not be loaded. In Sept 2019, I decided to take a road trip out west and converted my Honda Fit into a tiny camper van. Knowing how hot it can get and how humid sleeping in a car can be, I knew I had to get a portable fan with decent battery life that would give me some air circulation for a solid six hours as I tend to sleep hot.

Specifications:

Weight:
221 grams, light enough to shove into a backpack (though the buttons are easily depressed, so it might turn on while being packed up or moved around). As it's so lightweight it's easy to knock over especially in a travelling environment, I wish it came with some sort of hook or loop so it could be tied to something to try to stabilize it. The base has two small rubber pads that will keep it from sliding around a desk but won't keep it upright if you bump it.

Size:
3.5 inches wide by 5.5 inches tall by 1.5 inches deep. It's small enough to slide into a pocket yet large enough to provide a good amount of air flow even with it's small size.

Battery:
Battery life is approx 6 hours when run on low, 4 hours on medium and 2-3 hours on high. Charge time seems to vary depending on what you're charging it with (external battery took about 4 hours to charge, wall charger was about 2). The battery used is a generic and replaceable rechargeable 18650 cell which is pretty common in portable rechargeable devices. It uses a microUSB port to charge so you can use your cell phone charger or any generic microUSB cable to charge it. It apparently can run off an external battery on low settings with a dead internal battery but either doesn't charge or very, very slowly charges if you keep the fan running while charging.

Performance:
This little fan can move a surprising volume of air. On it's lowest setting airflow speed is the equivalent to approx 4 mph. Medium 7 mph and on high a nice breeze of around 10 mph. The fan on medium is about as loud as a computer fan that is running hot, so it's not silent by any means but I prefer a bit of white noise when I sleep. We have actually used this multiple times to stoke our campfire when wood was a bit wet and hard to light, it was very valuable in that moment.

Reliability/Longevity:
As I've only used this for a couple weeks during my trip, I can't speak to the quality of the components used to build it. A frequent issue seen in inexpensive fans is the bearings in the motor going bad. I have knocked this fan around quite a bit, crushed it a couple times in my backpack when I dropped it on the ground and knocked it over numerous times. I have yet to hear any imbalance in the fan as of yet, but I will update this review if I do.

Final Thoughts:
If you're looking for a small portable fan that is easily recharged and won't cost you much, this is a fantastic investment. I was quite surprised how much air this fan could move when I first turned it on and realized the lowest setting was plenty for me to fall asleep to. Small enough to throw in a purse or backpack yet powerful enough to help cool you down during a 90 degree day, I must recommend it if you're looking for an inexpensive portable fan.

I live in Arizona so I'm usually surrounded by heat or trying to escape it. I've tried quite a few different small fans. I get hot and sweat easily, and this was the only small fan I found that did a quality job of cooling me down. I brought it to work with me and used it at home daily except the, maybe, two months it was cold in Arizona. It is quiet. For it's size, it holds quite a bit of power, so it generates a lot of air flow, which I have not been able to find with any other small fan I've tried in the past. Because of how efficient it is, you also do not have to be super close to it to feel it, which has been an problem for me in the past with other small fans. So, you can sit comfortably without it blocking your way while working. You also feel a cool air because the amount of airflow you receive, which is yet another problem I've encountered in the past with other small fans.

I'm very impressed. The quality has also lasted for as long as I've had it - maybe 1-2 years now. Definitely recommend, especially for the price.