IS4 PCS Film Heater Plate Adhesive Pad, Icstation PI Heating Elements Film 24V 30W Strip Heater Adhesive Polyimide Heater Plate 45mmx100mm

They get really hot and function exactly as advertised. If they go above temperature the plastic will start to smolder but the adhesive is super durable (will not fail under continuous running at 24V 30W) Only reason it gets too hot and started smoking is due to not having a thermal regulator but that is at no fault of the product, they clearly say it doesn't self regulate. Worked great for the project I used them for.

These work pretty well, but they will de-laminate towards the middle/upper edge of their temperature range. At 100C, the adhesive melted and the polyimide detached from the resistive element. Besides the melted and burned appearance, this produced a noxious odor. However, it seems like they do still function.Decent value for money, anyways.

Got these for a heater project for the rain gauge on PWS. Snow, freezing rain, etc, make it hard to measure since they tend to not drip into the tipping bucket inside the unit.So, as part of my testing, I connected these to my bench supply. At 12V, they draw only 0.62A (7.5W). And at 24V, they draw only 1.25A (30W). All four of the heaters were consistent in spec.I settled on 12V so I don't melt my rain gauge! Plus, I decided to use a 45°C bi-metal thermostat between the film and the unit plastic to keep it from getting too hot.These are great little film heaters and I highly recommend them!

24v 30w - These get VERY HOT! Be careful about where you stick them. I don't recommend sticking to any plastic, even if the plastic is in direct contact with liquids on the other side (I did this, and they deformed the plastic). They are probably too hot to run more than a few seconds in free air or near textiles. Use them stuck to a large metal or perhaps temprred glass heat sink (e.g. beaker) and they are probably ok. They are way too hot to run near skin. I did not try to determine whether they have lower max temp with lower voltage. They ended up being too hot for my application, so I can't report on longevity.

I have a remote gate opener that uses a lithium battery for power. Problem with lithium batteries is that they will be destroyed if you try to charge them while they are below freezing. I used 2 of these heat pads (in series) along with a W1209 temp controller ( https://www.amazon.com/dp/B07VDRGK9F/ref=cm_sw_em_r_mt_dp_U_YlIcFb5TW4SS1) to keep the battery above freezing in the winter. Don't know if it would work in really cold areas, but in my area with only brief dips into freezing it works well.