So I’m noticing this more in the summer temperatures, but my FP6 gets incredibly hot when I use a fast charger, to the extent that it’s almost uncomfortable to handle and remains so until a few minutes after I disconnect. Is this normal? It worries me a bit and makes me wonder whether it’s safe to leave it charging unsupervised…
Which charger exactly are you using?
I would not say it is normal. I was affected by death by fast charging. Are you on Android or e/os? Latest software?
I would set the phone to eco charge and contact support. And make regular backups.
I’ve also noticed that the temperature is increasing, that’s normal. But for me it feels just “warm” and not “hot”.
What is “extremely” hot? Have you measured the temperature? What’s the ambient temperature? This all needs to be taken in account to judge if it is a “critical” hot or not.
On the weekend, when I will charge my phone again, I’ll measure the temperatures on my phone an you can compare with the temperatures of your phone.
I believe it’s this one
Android. Yes it does seem excessive…and worrying
I can try to measure it but it can be hot enough that when handling it my hands get sore…so definitely - speaking very unscientifically here - in the hot range rather than warm
Hey, the temperature is displayed dynamicly in the My Fairphone app under “Phone → Device Status”.
Here in german:
I alway use a 18W charger with USB Power Delivery function. It fits eco and fast charging.
The temperature rises steadily from the displayed 25 degrees (which is also the ambient temperature) to max 32 degrees during fast charging:
It is likely intended to measure the ambient temperature, but since it is installed inside the device, the device’s temperature will presumably affect it.
Mine too gets very hot, not just warm. I try to avoid fast charging when possible, because I’m worried about deteriorating the OLED screen over time.
Is 32 °C too hot or even dangerous for the FP6?
I ask this because mine goes very easily to 37-38 (and sometimes 42) during battery charges, even if I have slow charging always activated and use the FP charger.
I do not have FP6 but here it is what I found on the support pages
Is my Fairphone (Gen. 6) too hot or too cold?
Normal operating temperatures for electronic devices range from 25-43°C. Slightly higher temperatures are also normal, especially during intense usage like gaming or system updates.
You can safely use your Fairphone when its internal temperature is between -10°C and +55°C. Note that below 0°C, the battery will discharge faster than usual.
Avoid charging your Fairphone if the ambient air temperature is above 40°C. If the internal phone temperature reaches 60°C, stop charging and immediately power off the device. Allow it a few minutes to cool down before powering on the device.
My FP5 overheats easily. Once it reached 48 degrees and I have received a warning (not sure if prompted by the system or one of my thermal monitoring apps). When it did, it felt properly hot to touch.
Mine seems to be reaching 45 degrees or so…it feels abnormally hot for a phone. Just got a response from support with a whole list of things to do…but I’d rather find out here how normal this is with a FP as, if it’s not, perhaps I need to use my warranty for a replacement device
Had a similar issue recently with my FP4 while using a charger from a different, purely chinese company device.
Unreasonable hot to touch. I’ve switched to an old battery I had as backup, switched the charger and it doesn’t heat up now.
Just to take in consideration, that the battery could become defective as well in certain circumstances.
Once my phone started heating up, it did so with all chargers and started draining way faster. Which is generally a tellyale sign somethings wrong. So lucky that I still had my old FP4 battery.
As long as the battery stays below 40 degrees, then there is no problem. Between 40 and 45 could still be okay but if you can charge slower it would be better.
My fp6 became quite hot while charging to around 45 degrees from 20w to 30w charging. Then I bought the fairphone 65w charger with PPS and now the phone just gets warm at 30w charging.
Here a few observations from my side as a reference for further comparisons: Ambient temperature 25°C, fast charging up to 20W with an Anker Zolo charger, supporting PD 3.0 and PPS. Charging from 9% to 80%. Phone sits inside third-party silicone cover.
Maximum temperature reported during frequent lookups in the Fairphone app: 45°. Phone feels hot, but not too hot to touch and temperature drops quickly after reaching 80%.
Personally,I decided not to worry. Maybe will have a look again when charging with 30W maximum power.
Yeah, I got a response from FP support saying something similar, that 45 was fine but that it’s probably best to use a slower charger. I wonder whether it depreciates the quality of the battery faster, letting it heat up that much when you charge…anyway good to know it’s not dangerous! Thanks for all the input everyone!!
I once read about a YouTube channel presenting some long term testing results, e.g. see here Long-term battery test: Does fast charging actually harm smartphone battery longevity? - Notebookcheck News (Did not watch the source video). Results there were that fast charging nearly had no impact, with charging only up to 80% having a larger, but still minor impact on battery degradation. Of course, may depend on the device and higher temperatures are said to increase aging. Still, most dominant factors appear to be age and amount of charging cycles.
