pbbat(4) - NetBSD Manual Pages

PBBAT(4)                NetBSD Kernel Interfaces Manual               PBBAT(4)


NAME

     pbbat -- PowerBook 1xx Battery and AC adaptor


SYNOPSIS

     pbbat* at aed?


DESCRIPTION

     The pbbat driver supports PowerBook 1xx batteries and AC adaptors.

     The battery and adaptor status are made available through the envsys(4)
     API.  The battery information can be displayed also with the envstat(8)
     command:

       $ envstat
                       Current  CritMax  WarnMax  WarnMin  CritMin Unit
       [AC Adaptor]
            connected:    TRUE
       [pbbat0]
              present:    TRUE
       design voltage:   6.000                                        V
              voltage:   7.267                                        V
           design cap:  60.000                                       Wh
        last full cap:     N/A
               charge:  47.910                      3.674%   2.799%  Wh (47.91%)
          charge rate:     N/A
       discharge rate:   5.641                                        W
             charging:    TRUE
         charge state:  NORMAL


EVENTS

     The pbbat driver is able to send events to powerd(8) daemon when a capac-
     ity state has been changed.  The new state will be reported as the fourth
     argument to the /etc/powerd/scripts/sensor_battery script.  If a custom
     capacity limit was set via envstat(8), the pbbat driver will report a
     user-capacity event to the same script when current capacity limit has
     been reached.  AC Adaptor events are passed to the
     /etc/powerd/scripts/acadaptor script as pressed and released events when
     power is connected or disconnected respectively.


SEE ALSO

     adb(4), envsys(4), envstat(8), powerd(8)


AUTHORS

     Nathanial Sloss


HISTORY

     The pbbat driver appeared in NetBSD 11.


BUGS

     This driver currently only supports the PowerBook 100 series batteries
     excluding the 150 and 190 computers.

     The design capacity is an approximation of charge based on a new battery.

     The charge and discharge rates are approximations between successive
     reads of the battery capacity and should not be relied upon for accurate
     running time calculations.

NetBSD 11.0                     March 28, 2025                     NetBSD 11.0