Comment 29 for bug 1482390

$ uname -a
Linux bnasws02 4.5.0-040500rc5-lowlatency #201602201730 SMP PREEMPT Sat Feb 20 22:37:00 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

When the AC adapter is connected and the battery is not fully charged:

$ sudo acpitool -a -b
  Battery #1 : Charging, 95.76%, 00:13:41
  AC adapter : online

$ sudo acpitool -B
  Battery #1 : present
    Remaining capacity : 49108 mWh, 95.79%, 00:14:08
    Design capacity : 56041 mWh
    Last full capacity : 51268 mWh, 91.48% of design capacity
    Capacity loss : 8.517%
    Present rate : 9161 mW
    Charging state : Charging
    Battery type : Li-ion
    Model number : ASUS

When the AC adapter is disconnected and the battery is not fully charged:

$ sudo acpitool -a -b
  Battery #1 : Discharging, 95.79%, 04:31:57
  AC adapter : off-line

$ sudo acpitool -B
  Battery #1 : present
    Remaining capacity : 49085 mWh, 95.74%, 05:03:52
    Design capacity : 56041 mWh
    Last full capacity : 51268 mWh, 91.48% of design capacity
    Capacity loss : 8.517%
    Present rate : 9692 mW
    Charging state : Discharging
    Battery type : Li-ion
    Model number : ASUS

BUT:

When the AC adapter is connected and the battery is fully charged:

$ sudo acpitool -a -b
  Battery #1 : Discharging, 100.0%
  AC adapter : online

$ sudo acpitool -B
  Battery #1 : present
    Remaining capacity : 51901 mWh, 100.0%
    Design capacity : 56041 mWh
    Last full capacity : 51901 mWh, 92.61% of design capacity
    Capacity loss : 7.387%
    Present rate : 0 mW
    Charging state : Discharging
    Battery type : Li-ion
    Model number : ASUS

When the AC adapter is disconnected and the battery is fully charged:

$ sudo acpitool -a -b
  Battery #1 : Discharging, 100.0%, 05:55:17
  AC adapter : off-line

$ sudo acpitool -B
  Battery #1 : present
    Remaining capacity : 51901 mWh, 100.0%, 05:59:55
    Design capacity : 56041 mWh
    Last full capacity : 51901 mWh, 92.61% of design capacity
    Capacity loss : 7.387%
    Present rate : 8652 mW
    Charging state : Discharging
    Battery type : Li-ion
    Model number : ASUS