Two batteries recognized

[Ian Smith]

On Wed, 3 Apr 2013 02:12:15 -0400, Andre Goree wrote:
 > For some reason, acpi is recognizing two batteries, though my system has only
 > one.  I've searched Google but haven't really found a way to rectify this.
 > Any ideas?  Here's some information that may help, let me know if there's
 > other things I can provide:
 > 
 > [root at dlaptop ~]# sysctl -a | grep battery
 > hw.acpi.battery.life: 81
 > hw.acpi.battery.time: -1
 > hw.acpi.battery.state: 2
 > hw.acpi.battery.units: 2
 > hw.acpi.battery.info_expire: 5
 > dev.battery.0.%desc: ACPI Control Method Battery
 > dev.battery.0.%driver: battery
 > dev.battery.0.%location: handle=\_SB_.BAT0
 > dev.battery.0.%pnpinfo: _HID=PNP0C0A _UID=1
 > dev.battery.0.%parent: acpi0
 > dev.battery.1.%desc: ACPI Control Method Battery
 > dev.battery.1.%driver: battery
 > dev.battery.1.%location: handle=\_SB_.BAT1
 > dev.battery.1.%pnpinfo: _HID=PNP0C0A _UID=2
 > dev.battery.1.%parent: acpi0

You don't say what make/model laptop, though your acpiconf suggests some 
sort of Dell.  Many laptops have the capacity to add a second battery, 
sometimes instead of a CD/DVD or extra hard drive in a bay.  The above 
output doesn't indicate that there are two fitted, just the capacity for 
managing two in the ACPI/BIOS.

'bat0' and 'bat1' used below are not valid battery descriptors, specify 
only '0' or '1'.  Yes, acpiconf(8) should be a lot clearer about that.

Specifying any invalid string always gets you info for battery 0, ie is 
equivalent to 'acpiconf -i0', which is why the results below are both 
the same down to the serial numbers and present charge rate and voltage.

If 'acpiconf -i 1' shows other than 'Device not configured' you might 
indeed have some issue.

cheers, Ian 

 > [root at dlaptop ~]# acpiconf -i bat0
 > Design capacity:        5200 mAh
 > Last full capacity:     4677 mAh
 > Technology:             secondary (rechargeable)
 > Design voltage:         11100 mV
 > Capacity (warn):        520 mAh
 > Capacity (low):         157 mAh
 > Low/warn granularity:   52 mAh
 > Warn/full granularity:  52 mAh
 > Model number:           DELL PT43693
 > Serial number:          37449
 > Type:                   LION
 > OEM info:               Samsung SDI
 > State:                  charging
 > Remaining capacity:     77%
 > Remaining time:         unknown
 > Present rate:           2692 mA (33359 mW)
 > Present voltage:        12392 mV
 > 
 > [root at dlaptop ~]# acpiconf -i bat1
 > Design capacity:        5200 mAh
 > Last full capacity:     4677 mAh
 > Technology:             secondary (rechargeable)
 > Design voltage:         11100 mV
 > Capacity (warn):        520 mAh
 > Capacity (low):         157 mAh
 > Low/warn granularity:   52 mAh
 > Warn/full granularity:  52 mAh
 > Model number:           DELL PT43693
 > Serial number:          37449
 > Type:                   LION
 > OEM info:               Samsung SDI
 > State:                  charging
 > Remaining capacity:     77%
 > Remaining time:         unknown
 > Present rate:           2692 mA (33359 mW)
 > Present voltage:        12392 mV
 > 
 > -- 
 > Andre Goree
 > andre at drenet.info