I found a seemingly new problem recently after a battery change. When I plug in my device while powered off, the current reading on the keyboard screen goes from -0.5 amps +/- 0.1 to about -0.05 amps after a few seconds and stays there. When I turn it on, it charges again around -0.4 amps, but drops down again when I shut the device off. I have tried this with my original charger and a Ravpower wall wart my wife and I use for our regular laptops.
My device is an RK3588 upgrade on mainboard version 1.0, battery board 2.0, and firmware 20251030.
For the past few months, I have been using 706090 batteries. When I go to the battery status screen, the voltage reading would jump to 9.9V for a second or two before dropping down to more believable levels.
Last week I switched back to the 606090 batteries that came with my device when I bought it in 2023 to see if they did the same thing. I had disconnected them at around 50% and kept them in an anti-static bag.
When I re-installed them, I started having the problem where the battery stops charging at a random percentage. I disconnected and reconnected them, then went through a recalibration where I charged them to 100% and then ran the device until it shut off automatically.
Since then, they seem to stop charging at just above 60%. They were 66% when I left for work this afternoon with the device plugged in and powered down, but had dropped to 62% when I came home. The charging light was on, but the current seemed to vary between about -0.03 and -0.05. I could get the current to go back to -0.50 if I plugged it back in, but after a few seconds it would drop down again. Turning it on seems to help, but the current drops after I shut it down.
I think my next step ought to be trying the 706090 batteries again and see if they run into the same problem.
What do you all think? Any other suggestions?