PineTab-V stopped charging battery when ON

NOTES.md

pinetabv:~$ while true; do echo "`date +%Y-%m-%d_%H:%M`, `cat /sys/class/power_supply/cw2015-battery/capacity`"; sleep 120; done 
2023-10-14_18:29, 39
2023-10-14_18:31, 39
2023-10-14_18:33, 39
2023-10-14_18:35, 39
2023-10-14_18:37, 39
^C
pinetabv:~$ while true; do echo "`date +%Y-%m-%d_%H:%M`, `cat /sys/class/power_supply/cw2015-battery/status`, `cat /sys/cl
ass/power_supply/cw2015-battery/capacity`%"; sleep 120; done 
2023-10-14_18:39, Charging, 39%
2023-10-14_18:41, Charging, 39%
2023-10-14_18:43, Charging, 39%
2023-10-14_18:45, Charging, 39%
2023-10-14_18:47, Charging, 39%
2023-10-14_18:49, Charging, 39%
2023-10-14_18:51, Charging, 39%
2023-10-14_18:53, Charging, 39%
2023-10-14_18:55, Charging, 39%
2023-10-14_18:57, Charging, 39%
2023-10-14_18:59, Charging, 39%
2023-10-14_19:01, Charging, 39%
^C
pinetabv:~$ echo "connected USB-C dock to charging"
connected USB-C dock to charging
pinetabv:~$ 
pinetabv:~$ while true; do echo "`date +%Y-%m-%d_%H:%M`, `cat /sys/class/power_supply/cw2015-battery/status`, `cat /sys/class/power_supply/cw2015-battery/capacity`%"; sleep 120; done 
2023-10-14_19:03, Charging, 39%
2023-10-14_19:05, Charging, 39%
2023-10-14_19:07, Charging, 39%
2023-10-14_19:09, Charging, 39%
2023-10-14_19:11, Charging, 39%
2023-10-14_19:13, Charging, 39%
2023-10-14_19:15, Charging, 39%
2023-10-14_19:17, Charging, 39%
2023-10-14_19:19, Charging, 39%
2023-10-14_19:21, Charging, 39%
2023-10-14_19:23, Charging, 39%
2023-10-14_19:25, Charging, 39%
2023-10-14_19:27, Charging, 39%
2023-10-14_19:29, Charging, 39%
2023-10-14_19:31, Charging, 39%

Yes, normally I just put the new image onto a SD card (with dd) then I boot from the SD card, and then I copy or download that new image again while I am running from the SD card, and dd that image on the eMMC, then I reboot, pull out the SD card, so PineTab-V boots from the eMMC.
Obviously backup your files and data first, before doing a reinstall.

The charging issue is hardware related. The fix is coming in the next revision of the hardware. The /sysfs/ trick just tricks the hardware into high current mode. There is no “fix” in software for the issue.