Battery Fan, Portable Rechargeable Desk Fan Strong Airflow Silent Personal Mini USB fan 3 Speeds with Flashlight & Blue Light Table Cooling Fan for Office Traveling Fishing Camping - Black

So far, so good. I was reluctant to spend £40+ on a larger desk fan that would, in all likelihood, be too strong for how close it would be to me, so I took a chance on this after reading some good reviews. The portability also got me interested as, rather than a pure USB fan that I wanted to avoid (I have one at work that's not so effective in very warm conditions), this runs off battery so I can literally take it anywhere.My flat gets very warm very quickly, particularly in the corner where my computers and guitar amp are set up and this fan is proving a nice relief from the often oppressive heat without being intrusive in terms of size and presence. What's most surprising is how powerful it is. I've got it set up on top of a money box to get it to a decent height and it kicks out a really good breeze without going full blast - I have it on '2' and it's perfect.I'm also using it straight out of the box without charging and it's lasted about an hour so far on '2'. I did flick it up to '3' and it turned itself off fairly quickly - I'm yet to ascertain whether this is a fault or the battery being too low to maintain the highest setting.In terms of noise, at the highest setting it is a bit loud. '1' and '2' are fine, though, particularly as I play a lot of games with headphones on making the humming unnoticeable. The LED light and plain side light are nice, handy additions, though I'd like them to do a red backing light to go with the colour scheme of my man-corner, but that's being picky.Overall, my first reactions are purely positive. If in peak Summer it's still cutting out on the highest setting I may revise this, but, let's be honest... English Summer's are hardly tropical.

I'm quite impressed with this fan. For starters, the included battery appears to be is genuinely made by LG and is nominally 2600mAh. I tested its capacity on my Charsoon Antimatter hobby charger. After charging it up to 4.2V, the real discharge capacity was 2550mAh when discharged to 3.0V at 1A. Had I done the discharge in accordance to the datasheet parameters (0.5A to 2.75V) I'm sure it would have exceeded the rated 2600mAh.Now onto the fan. The fan itself is a brushless DC motor - practically identical to a computer fan in terms of construction and noise signature. It's much, much more effective than the cheap brushed motor fans you find for sale everywhere. This fan makes enough airflow to create noticeable cooling even at the lowest setting.Onto the features. The left button turns it off. The right button turns it on. Every time you press the on button, it cycles between modes in this sequence - low, medium, high, sidelight, off. "Sidelight" basically turns off the fan motor and turns on a white LED on the right hand side of the fan (to illuminate the room).There seems to be no way to have the white sidelight and the motor on at the same time. There's also no way to cycle backwards through the modes (eg to go from speed 3 to speed 2). However, after pressing the off button, the next click of the on button always restarts it from low speed. So for example if you want to go from speed 2 to speed 1, you could either press "on" 5 times (to go 3, light, off, 1, 2), or press "off" then "on" twice (to go 1, 2). Hope that's clear, you'll understand immediately if you use the fan. Most competing fans only have the on button, so you have to always go the long way round to decrease speed.It has another cool feature in the form of a blue accent light that illuminates the fan blades. My photo shows what I mean. To turn on that light, you turn on the fan, then hold down the on button for about 4 seconds. This light can only be turned on when the fan motor is operating. It resets to off when you turn off the fan - so you'll have to press and hold the on button again to get the blue light any time you turn off the fan.Lastly, I have to say I'm very impressed with the quality of the instruction book. I'm an engineer by profession and when I get a device like this I normally measure and write down the current draw to calculate the expected battery runtime. In this case the instruction book contains a table of the current, rpm and projected runtime in each mode (see photo). And it's written in good English too.All in all I'd definitely recommend this fan over the half-dozen similar models you'll find for sale for a similar price. The battery alone is worth at least 25% of the value of the whole fan, and the fan is well-built and has the blue and white lights that not many of the competing models seem to have.I can't comment about durability as I've only had it for a few days. However I did a test of the low-voltage cutoff and found that it stops running with a battery input voltage of 3.00V. That's spot-on, it's perfect to prevent over-discharge of the lithium battery, so the fan should give a long service life on the original cell alone. I didn't test the charge cutoff voltage as I use an external fast charger for my 18650s.

Being able to remove the USB charging cable is an added bonus. Good power and the charge lasts quite long on level 1, I haven't needed to go higher yet.

The media could not be loaded. What I like about this fan is you can power it via usb either from your laptop/computer or plug it into a usb charger or power bank. There's also removable rechargeable battery in the bottom which powers the fan for several hours if you don't want to plug it into a power source. There's 2 lights too! A bright white led on the side & a nice blue led which illuminates the fan (You just hold the power button in for a few seconds while the fan is on & the blue light comes on, makes a great night light).The fan has 3 speed settings, the lowest is a nice breeze, the highest is like a windy day. For what it is, it's a powerful little fan. If you intend to leave it on like I do I would suggest removing the battery so that it doesn't lose its ability to charge over time.This is my 2nd one of these. The 1st one failed after nearly 2 years of 24/7 use which far exceeded my expectations! I couldn't live without it so immediately ordered another.All in all the best little fan I've ever owned.