I had problems about a month ago or so, my FP3 wouldnt charge up properly and the cable kept falling out. I did use my lenovo charger by mistake (it looks almost identical…) which I took to mean the reason it had problems - perhaps it was too much for it. It got so bad it took some where between 24-48hours to charge it fully it was so slow and if the cable fell out by knocking it slightly as you walk past, that would obviously make the situation more frustrating.
I purchased a bottom module and an official fairphone cable & charger direct from fairphone. It all worked great for about a month or so, super fast charging perfect. But now its not charging properly again, it doesnt even tell me if its charging rapidly or charging slowly etc the only way I can tell its charging is an led light on the front of the phone goes red. This was how it was before - the cable is not falling out though but its exactly as it was before!
If possible, test with another FP3 battery before ordering a new one. If there’s a fairphoneangel nearby they may be able to help.
The red LED, by design, indicates abnormally low battery charge. The phone may need to charge for quite a long time to recover. How old is the battery? Did you check the battery status as indicated by Amoun?
The spin test image is a generic battery, the innards of the FP3 and FP3+ are mostly identical. All parts are dimensionally the same, only the inside of the modules differ and of course the white circles around the camera lenses.
The contacts in the USB C socket in the bottom module
The contacts between the bottom module and the core module
Cleaning debris can be done with a small pick in the USB C
The contacts can be cleaned of oil etc. by using Isopropyl Alcohol (any 90% clean alcohol)
Heavy tarnishing may require a scrub, some use a tooth bus.