Nitecore EMR10 - Bug repellant, 2x21700, Powerbank, USB-C

I received the EMR10 from Nitecore for the Review.

The EMR10 is a battery (1 or 2 21700) powered mosquito repellent with USB-C charging and powerbank functionality, 2 modes (indoor and outdoor) and a display to convey useful information.

The EMR10 comes in this box.

MY EMR10 comes with 2x21700 5000mAh battery preinstalled (there’s also available a version without batteries included), manual, USB-C Cable, 10 extra large and individually sealed mosquito repellent pads.

The EMR measures 167 mm x 60mm x 33.5 mm, and weights 135 grams without batteries, 304,6 grams with the 2 provided 5000mAh 21700 batteries. The body of the EMR is made out of plastic, with a grey upper and lower body, and a black outer side with gripping texture.


At the bottom there’s a button to unlock the battery cover.

The top part, where the heating element is, is shielded by a black plastic guard that can be removed


With the shield removed, you can remove the sturdy metal clip

The USB-C port at the top of the EMR10.

The OLED display shows several information, like % of battery, runtime, active function etc.




The EMR10 works in 2 ways as a repellent:

  • Battery powered heating pads device: on the top of the EMR10 there’s a slot where you can insert 1 extra large Nitecore repelling pad (or 2 of the generic brands smaller ones), and the resistance will heat it up. There are 2 heating levels: a lower one, better suited for indoor uses, and higher one, for outdoor uses. The EMR10 will provide effective shield from the mosquitos after around 10 minutes from the activation.
  • 25kHz and 40kHz ultrasound repeller: this is more useful to deter other pests like snakes,mice and other instects. With my ear I can’t feel any noise coming from the machine when the ultrasounds are active, only the faintest electronic noise when i’m with my ear practically glued to the EMR10.

Both functions can be used when the activated when the EMR10 is charging or being used as a powerbank. There’s also an electronic lockout to avoid accidental activation.

The EMR10 can work with 1 or 2 batteries, and the OLED display allows you to see: runtime, instant Watts (either in or out), selected mode (indoor or outdoor) and if the ultrasounds are on or off.

The Powerbank functionality allows for 18W (QC3.0/PD3.0, 5V 2.4A or 9V 2A as input, 5V 2.4A or 9v 2A or 12V 1.5A in output) both in charge and as a powerbank.

My thoughts

The EMR10 is well built and finished.

I like the EMR10. It does exactly what it’s supposed to do. The anti mosquito feature works well, with 2 levels that suit both indoor and outdoor uses. I can attest to the functionality of the anti mosquito feature, however I could not test the ultrasonic repellent feature. If you plan to go for camping, I would suggest to also use the ultrasonic repellent, as I have seen some efficacy in other devices with the same technology. The OLED screen gives you all the information you need, and the interface is quite easy to use, with both the backlit buttons (once their function is active) and the display.

The powerbank feature is a nice addition, with reasonable speed (18W). I like both the fact that the EMR10 is USB-C rechargeable, as well as it uses universal, non proprietary batteries. In a pinch, 18650 batteries could work too with the appropriate spacers. Of course these extra features make the EMR10 a rather large and heavy device, but for sure useful in the summer. If you are interested in this technology, but the weight and size are a concern for you (or if you don’t care about swappable batteries), there are other mosquito repellent from Nitecore that would work for you, with or without the powerbank function.

I am planning on taking it on vacation and being able to enjoy my evenings outside, without having to paint myself with nasty smelling mosquito repellent.

The only issue I have is that removing the battery cover with the clip installed is a bit difficult, because the clip presses on it.

Thanks to: AntoLed, Won, Zampa

So they took the thermocell and made it electric.

IDK. I have a thermocell and it works great. Been using one since they came out. It is annoying with the cost of the refills and butane carts. If I was in the market without already owning one I might go after this version. It will depend on how easy it is to get refills and their cost. I can run in any local store with a sporting section to get thermocell refills. Is nitecore gonna set up something easy like that in walmarts or am I gonna have to keep track of what I have and mail order them (also adding to the cost). Even better will the thermocell pads fit this? I’ve already retrofitted my butane carts to be refillable.