1.\" $OpenBSD: acpibat.4,v 1.8 2017/03/30 16:04:36 jcs Exp $ 2.\" 3.\" Copyright (c) 2006 Dmitri Alenitchev <dmitri@wave.net.ru> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: March 30 2017 $ 18.Dt ACPIBAT 4 19.Os 20.Sh NAME 21.Nm acpibat 22.Nd ACPI control method battery 23.Sh SYNOPSIS 24.Cd "acpibat* at acpi?" 25.Sh DESCRIPTION 26The 27.Nm 28driver supports the ACPI Control Method Battery interface between the 29battery and the host. 30Information about the battery, such as capacity, recharge rate, voltage, 31and serial number, is available through this driver. 32Battery status is updated through an event triggered when a battery 33changes state (such as starting to charge) and, as a failsafe if the 34system does not support passing such events, every 10 seconds. 35Battery status can be monitored using 36.Xr sysctl 8 37or 38.Xr sensorsd 8 . 39.Sh SEE ALSO 40.Xr acpi 4 , 41.Xr acpisbs 4 , 42.Xr intro 4 , 43.Xr sensorsd 8 , 44.Xr sysctl 8 45.Sh HISTORY 46The 47.Nm 48driver first appeared in 49.Ox 3.8 . 50.Sh AUTHORS 51.An -nosplit 52The 53.Nm 54driver was written by 55.An Marco Peereboom Aq Mt marco@openbsd.org . 56.Sh BUGS 57Some systems do not propagate battery insertion up to the driver. 58