Works! But takes more than one
589866
I find if we wear one on each wrist and one on each ankle, we don't get bit unless the mosquitoes are voracious.
4347931
They work.  Period.  But you need more than just the four that come in one pack.  They can get pricey at that rate.
3940663
i'm giving1 * for now maybe i can change it if i find i'm @ fault.it is very difficult to get it started-almost impossible.i get it to start about once every 30 times so i think i'm doing the right position of the various parts.
3667912
Works as expected, but can't handle more than one larger appliance at a time. Example: Hair straightener on and laptop charging at the same time is a no-go. Otherwise, works great for charging up multiple small electronics at a time.
3960800
Took me a while to get it to work, but works flawlessly now.  Wish it had more settings, a 2x or 3x would be nice as I always find myself needing multiple doses.
4372283
Works ok but it takes time to get it right!  My timer also stopped working after second use. I have to do this and then strain my yogurt, I make a huge mess and spend so much time and at the end I don't get it right :(. I just buy it instead of making it from scratch bc it could be so time consuming
443632
It works!  However there is only three wires so you have to spice in a ground going to your 12 volt device.  The wires are too short, maybe 18" or so to go reach the +  and - on your 48 volt batteries.  Seems to me for another few pennies they could have given you 4 wires long enough to reach.  However, it does work at least so far.
808058
It is important to read the directions. For one thing, it says to NOT shake it, which is counterintuitive! It works great, but, seems to have a short life. However, 16 of them go a long way! It "frosts up" and takes a long time to evaporate, and doesn't really move particles around that well, but, it is adequate, and the price was right (far cheaper than even half the number of name brand compressed air cans in most retail stores).
4950014
Bought two of these, they work. But spent a lot of effort loosening the female slots where an electrical plug enters. At first, I could not insert a plug fully (I could still see the metal blades of the plug), but after repeated insertion and forceful oscillations, I was able to get the required insertion force to a reasonable level.
289506
working fine just not as fast as i was hoping
4694641
Took a bit of time to work, but eventually I got the thrugh the instructions and now I have two working remots.
3590099
For what it is, it is expensive, but it does work.  It took me a few minutes to get it working, but it works like a champ.
3555091
I have read complaints about the eight-second setup limit being too short. Here's how to get around it:

If you're doing different things to four different batteries, make sure you insert just one battery and then set it up. Insert the second battery, do the setup, and do the same with the third and fourth batteries. That gives you eight seconds for each battery.

If you're going to do just one thing to all four batteries, here's what you should do:

Insert all four batteries while the power cord is disconnected. Connect the cord to the outlet and set it up. That way, you don't need to beat the clock. It's really not rocket science. ;-)

P.S.
About the charger not charging "dead" batteries, position the bad one beside a good battery on the charger, then short the positive ends of the two batteries using a thin paper clip for several seconds (make sure the charger is not powered). This should somehow revive the dead battery and will allow the charger to recognize and start charging it.

I'm giving this charger four stars because one part of the LCD is dead -- instead of getting a reading of 208, for instance, what I get is 20 ) (an inverted letter C).

Cheers,
Norman
3275499
Work
Is ok but if you have more than one device plugged in at a time it charges verrrrrry slow
2012993
Only used it once so far.. but it worked as it is supposed to!
4681385
Still hard to install (it took two of us), but it works. The line may be too short to last long.
4207154
Works great, just have to figure it out first.