USB Heating Pad, 5V Heated Travel Blanket Pads for Car Airplane, FSA HSA Eligible 3 Heat Settings & Auto Shut Off, Warm Therapy for Pain Relief Abdomen Cramps (16″x 12″) (Non-Chargeable)

Pointless
This heating pad is barely big enough to fit in the seat of my office chair. It never feels warm, and it shuts off after just 45 minutes. If the heat were adequate, maybe 45 minutes would be okay. But, this thing doesn’t even get to normal body temperature on the High setting. The actual heated area is small and the warmest section is just in the middle. This is very disappointing.I used a brand new temperature gun and verified it was accurate against known temperature of other items. I then scanned my chair for a baseline and proceeded to scan most areas of the heating pad, from outside to inside. See video.I tried it plugged into a USB port and with a battery pack. Results were the same.

Good product for the price
Edit: as you will see below, my initial experience was not good. The company, however, reached out and made it right. They sent me a replacement and so far, it is working great! I appreciate their attentiveness and making this right!!I purchased this item in August 2024 to have for upcoming trips. When it arrived, I gave it a try and was pleased with the product. I took the item with me on a trip in Sept 2024. It would not work in my car — I tried both USB connection and with an outlet. Upon arrival, I plugged it in just to check and it worked fine.I didn’t use it again until I packed it on a trip in Oct 2024. While on the plane, the lights would come one “red, blue, green” then nothing — it would not come on. It would not work. I tried it in my hotel room and the same thing happened. After arriving home, I tried once again. The lights came on and then nothing. I unplugged it and tried again. Now the lights won’t even come on. I used this twice! Two times and it will not work now. I tried to contact the seller and had zero luck.

1-YEAR WARRANTY & HASSLE-FREE REPLACEMENT , but 100% impossible to contact them
USB heating pad worked great for 10 month, but now it does not heat anymore. Tried different powerbanks and USB cords. Heating pad is dead. Website says : “GUARANTEE: A Free No-Hassle Replacement Process; If you have any problems, please feel free to contact us, we will take care of it within 12 HOURS to ensure our customer experience; 1-YEAR WARRANTY & HASSLE-FREE REPLACEMENT! Use with Confidence”. But it is impossible to contact them. No Email, website nothing. This is false advertising, No-Hassle

Cheap barely warm pad.
I got this because I wanted to take one apart and see how they worked really, and this cheap chinese thing was exactly the right sort of low quality basic engineering I wanted to see. Its also a good way to show people through the photos here of what they are getting.The fabric was designed well enough that I ended up having to cut it open at one of the sides, as I tried very carefully to pick it open by the threads but it was too well sowed for that. So thats at least one decent portion of this.The powerflow for high power mode was stable too. So that was good. It used intermittent pulses for the other power modes, less frequently for the lowest.The actual heating area, was pretty much the circled spot, a little more square than my circle but it was very weak around the edges, hard to tell where it was heating, till I opened it up to see what was inside.After cutting it open, I took a photo of this with light behind it so you can see whats inside the fabric with the heating wires. It appears to have a temperature sensor, I’m not sure what that is, which indicates that there is at least a safety switch in there so thats good. Possibly just barely enough to pass international quality requirements.Now that I deconstructed it, its not returnable. I’ll just have to see if I can repurpose it for something else now and make it more useful, while keeping the fabric around for padding something of mine that I lay against frequently.