Had another close look at @SmartWatch_Ticks new video where he disconnects the battery from the watch.
At the outer rim where the battery connector goes are two solder/test pads on the pcb. If these are equal to the +/- of the battery that would enable us to replace the specific battery with a generic one.
These batteries are cheap, but that comes sometimes with a price. that price is called Internal Resistance. The battery wil measure 4.25 volts when fully charged, but as soon as the watch is powered on, the internal resistance wil drop the voltage conciderably.
I’ve seen some posts where people have good and some bad battery life experiences. These could be caused by a better or worse internal resistance. Same batch of batteries, cheap production line.
With these two solderpads, you would have the option to cheaply replace the battery. They only cost a few dollars.
I’ll test the pads as soon as I’ve recieved the watch