EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: PeterMadach on November 21, 2024, 02:03:10 am
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Hello All,
I have a rechargeable wireless keyboard (Keychron K2 V2 ISO RGB) which seems to have killed it's battery, or at least it started killing it. When it is plugged in to cable the charging Led keeps blinking and also makes its backlight flicker which is super annoying. I took it apart and measured the voltage which sits at 4.1V, which seems like the turning point where the charging circuit wants to give it some boost, I guess the pack cannot handle higher voltages for long. It did not look swollen tho. Nevertheless the solution for the issue seems pretty straightforward, just swap it to a new one, but I'm not too happy that the keyboard kills a battery in less than 2 years. Since I use my keyboard almost all the time in wired mode, my best guess is that the reason why this happened so quickly is because the charging circuit keeps it in high charge all the time, so I was wondering if there is hardware based solution which I can use to limit the battery charge to somewhere between 50-80%? Unfortunately there is no way to limit the charge level in software/firmware.