Portable battery-powered fan?

Pete, thanks for this post. Now I am shopping.

I bought a couple smaller single 18650 fans from Caseys early last year for camping. They were cheap, worked great until I tried to run it while charging, burnt both of them up.
My wife likes to have a louder fan, I don’t mind the white noise now, took me long time to get use to it, now I have trouble sleeping when its to quite.

I also like a fan during the evenings to help keep bugs away (sometimes helps). Or keeping the smoke away.

I currently use a comfort zone usb power fan, on my dresser next to my bed, just barely enough airflow. It rotates , I cant find a link to it, got it last year, Menards i think

My COMLIFE 7.5 Inch Battery Operated or USB Powered Desk Fan is being delivered today, one day after I ordered it from Amazon.

Nice. I ordered the 9” version.

Ordered: June 3
Delivered: June 5

Wouldn’t that technically be two days?

Please let us know how it performs.

I will :slight_smile:

That’s what Amazon Prime guarantees. Mine still hasn’t arrived yet. I’m guessing the Fed-Ex will be delivering it since USPS was already here.

Make sure that you all test your COMLIFE 18650 cells out. They look like naked junkers, but they’re run in parallel, so you have that going for you!

Chris

I ordered 9” sunday, it just arrived, put some 13q’s in while the batts it came with are charging. Nice and quiet and high speed puts out a good bit of wind!

Hi Chris, I’m doing a nor test right now. Both cells were around 4 volts. In the meantime, I’m using Samsung Q30’s. My initial opinion of this fan is positive. The low mode is very quiet and is more than enough CFM’s for my needs. Build quality is very good. I think it’s a steal at $21.24.

I’m looking at them now, although as I suggested above, I went the 02 Cool 10” 8/6xD (12vdc input) fans for my hurricane preps, which came in handy during hurricane Irma last September.

Any quality HiCap 18650 would probably be better, even naked cells are fine in your fan and you should be able to extend the duty cycle by 50% using something like NCR-GA Pannies, or even the cheaper NCR-Bs. I’m sure that it’s not pulling more than 500mA on high, so it’s not a strain on the cells.

I would run the good cells down and charge them back up with the internal charging module and then measure the cells when you see that they’re full, just to confirm what the charger is doing. If it’s within spec, then you know and if it’s dwanky, just charge outside the fan.

Good luck.

Chris

Chris, I’ve decided not to use the original cells. I have plenty of Samsung Q30’s, so I’ll be using those. It’s better to be safe than sorry. I’ll be using this fan on an Anker USB Power Supply most of the time. The batteries will come on handy when I’m not around house power such as camping, etc.

Trust buy verify. They could be quality cells, or they could be re-wrapped laptop pulls, lol.

Quality cells are so cheap that it just makes more sense…but confirm what the internal charging module does. That’s just as important.

Chris

Chris, I’m on top of it. I’m very careful when it comes to these cells. I never leave them alone when I’m charging. I always charge on fireproof surfaces, and I have a fire extinguishers just in case.

I think Chris was referring to testing the capabilities of the fan’s built-in charger.

I will check that out too.

For the 7.5” version, runtime on high is listed as 5 hours. If that’s based on 2x2200mAh cells, then that would translate to about 880mA current draw, give or take.

But your point is still valid - any 18650 cells can handle this.

FYI, protected cells will not fit in this fan. I am currently running down one cell in it to find out at what voltage it stops as I was not able to get an answer if there is any kind of LVP built in.

There are a lot of variables there, that are unknown and these are cheap ChiCom fans, so who really knows what’s what?

My reference is only my two O2 Cool fans and both have 500mA vdc stamped on the barrel input, so they want a wall wart capable of supplying 500mA at 12vdc, so 6w for power consumption, for the HIGH setting? It’s a 10” diameter blade, so I doubt that these ComLife fans are drawing more, but that’s just a guess.

Anyhow, I was talking about verifying the internal charging module to make sure it’s charging in spec…

Chris

Some assorted info regarding my 9” COMLIFE fan:

- Actual name on the box (and on the cells) is LILENG

- Model number: 836

- Power consumption: 3.5W (per included documentation)

- Current draw when running on battery: 0.48A (low) / 1.1A (high)

- Current draw when running on USB cable: 0.6A (high)

- Current draw when charging via USB: 0.7A

- When running on battery, the fan starts cutting out at around 3.33V, and then slowly agonizes with frequent on and off for about 5-10 mins until voltage drops to about 3.3V, at which point the fan stops

  • Supplied cell capacity (tested on Lii-500): 1422 / 1426 mAh

All in all, nice little fan, minus the junk cells.

FYI, I’m missing the water bottle that was indicated in the Packing List. I’m sure it was a good one! :slight_smile:

Hi folks,

If you want an amazing twin cell 7.5 inch 18650 desk fan (wired parallel) this is the one to get linked below. I’ve purchased numerous fans, including the O2 Cool brand, but this one
blows them all way. Never needed it on HIGH fan power, and both my wife and I sleep like babies on the LOW fan setting. Pushes lot of air and the LED night light is far superior to all the rest.
We originally purchased one unit from Amazon, but when we saw how great they are, over the last few weeks, we now own 3 of them. On LOW fan power, lasts well past 8 hours of sleep.

The unit comes with two 18650 cells labeled as DP brand in a light green wrapper. I don’t know what Chinese brand they are, but one of my emergency power banks contain the same 18650’s, only 27 of them. They appear to be great cells and hold a 4.20 charge perfectly.

MIADY

Last year I ordered three of These and added a 5K potentiometer to the back of the housing of the fans.
I bought them for camping, but we now use them at home as well. The kids love it.

Works great, analog speed setting, cheap, works on both battery pack or usb charger and not noisy.