Friday, July 1, 2022


RVelectricity – Just Ask Mike (J.A.M.): Mike gets “So kool” with an O2COOL personal fan

Welcome to my J.A.M. (Just Ask Mike) Session, a weekly column where I answer your basic electrical questions. If you’re a newbie who’s never plugged in a shore power cord (or ask – what’s a shore power cord?), or wonder why your daughter’s hair dryer keeps tripping the circuit breaker, this column is for you. Send your questions to Mike Sokol at mike (at) with the subject line – JAM. Today I talk about a nifty little rechargeable personal fan.


Dear Mike,
I really liked that Embr Wave watch you wrote about last week for your wife’s hot flashes, but at $300 it’s out of my price range. Do you know of a more affordable solution? —Rita

Dear Rita,
To review, here’s what I published about the Embr Wave last week.

Yes, it works great. And yes, it’s expensive. But here’s another possible solution that’s quite inexpensive and shareable. Yes, you can get a pair of them (or more) in contrasting colors.

The Necklace Fan

I bought two of these fans for my wife, Linda, and myself last year, and they’ve been great. The 02COOL Necklace Fan has a built-in lithium battery that runs for up to 12 hours. It can be recharged with a standard USB cable and power supply.

Note that the stream of air blows straight up, so your face gets a windy breeze with both of your hands still free. It has three speed settings from gentle to a significant breeze. And it’s really very quiet, so you won’t bother anyone else in the room.

Linda uses her O2COOL fan while working in the garden, walking when the weather isn’t cool, or even in church when the air conditioning isn’t on. What’s not to like?

How much does it cost?

That’s the best part. You can buy a pair of these O2COOL fans on Amazon for less than $40. In fact, I had to buy extra for Linda to give to her sister and a friend as birthday gifts. So be prepared for your friends to ask where you got it.

The following ad was auto-inserted by Google

Keep Cool… O2 Cool!

Looks like this is going to be a hot summer, so remember to hydrate and keep out of the sun as much as possible. And any kind of fan will help keep you cool, as well. You can find the O2COOL personal fans on Amazon HERE. Just note that there’s a version that requires 2 AA batteries, and you want the rechargeable version.

OK, everyone. Remember that electricity is a useful and powerful force, so we all need to pay attention to safety precautions while using it.

Let’s play safe out there….

Send your questions to me at my new RVelectricity forum here.

Mike Sokol is an electrical and professional sound expert with 50+ years in the industry. His excellent book RV Electrical Safety is available at For more info on Mike’s qualifications as an electrical expert, click here.

You don’t want to miss Mike’s webcasts on his YouTube channel.

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Bob p
24 days ago

I ordered the O2cool on your recommendation, not for hot flashes but for cooling air when it’s 90 and the humidity is 95% here in Florida. As long as a breeze is blowing I’m OK but when the air is dead I burn up, I will let you know how it works for me. Thanks

Mike Sokol
24 days ago
Reply to  Bob p

Yes, please let me know….

Bob p
21 days ago
Reply to  Mike Sokol

As President Reagan would say, We’ll… I ordered it, now $19.97+tax for one, it arrived on time and I opened the package, started the motor and immediately heard grinding noise. Turning it flat on its back the grinding noise subsided and finally quit. Picking it upright as it would be if hanging around my neck the grinding started again. It turns out the motor and pocket recess it fits inside are of different diameters allowing the motor/fan assembly to “float”. Being mechanically minded and not wanting to go through the return process I opened the case halves and with just the right amount of electrical tape the motor is now securely held in place. This should be useful to me as when I’m working outside if there is a breeze I can work. If the air is dead I sweat so badly it runs off my head and drips on my glasses then I have to stop to clean the glasses and I spend more time cleaning than working. Lol, typical Chinese quality!

Mike Sokol
19 days ago
Reply to  Bob p

Well, after buying 2 of them for my wife and myself, we ordered 4 more for gifts, and they all seem to be working well. But yes, imported products can have varying levels of quality assurance…

25 days ago

We bought our first O2Cool fan 20 years ago when we had a non-electric site and it was very hot out. Can run on electric power, plugged in a “cigarette” lighter, or batteries. Great product we still use in our RV today.

25 days ago

Thanks for sharing Mike‼️

Stay safe, Joe

25 days ago

I love it! Now if only it used USB C….

25 days ago
Reply to  TIM MCRAE

Adapters are available for the ends of your cord on Amazon.

Steve K.
25 days ago

Not really much of an electrical concern but I guess you have to keep the sponsors happy.

Mike Sokol
25 days ago
Reply to  Steve K.

These are not sponsor supported articles and I don’t make a cent from Amazon. My Monday JAM sessions are used to answer any questions readers send me about camping lifestyle. My Saturday RVelectricity columns are more oriented on RV electrical power. 😁

Jesse Crouse
11 days ago
Reply to  Steve K.

Good, bad or indifferent Mike always gives you the “straight skinny”.

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