Pinebook's battery flat on arrival

[p3p1]

Finally it's working after 23 times. I have a question the right ways to shutdown are the shutdown dialog or press power button (physical button) for 12 sec: is there a way via terminal ?

There are several ways to shutdown and poweroff the system.  The two main (best) ways are following:

1)  press the power button (physical button) briefly which will pull up the dialogue, then click "shutdown"  ;  this will do the  "poweroff" under the covers.

2)  on a terminal enter :

       sudo poweroff

shutdown -h now   is deprecated;  since systemd don't use it !

sudo halt  will only shutdown the system;  but it won't poweroff !!

New problem: with pinebook turned on if I remove the power supply it turn off (as if the battery not present). If I re-plug again the power supply the power led blinks and power button doesn't turn on the laptop. In this case only solution to boot is unplug and re-plug the battery connector under the cover. How I can solve this?