Still reproducible with 4.6.0-040600rc6-generic:
$ uname -a Linux bnasws02 4.6.0-040600rc6-generic #201605012031 SMP Mon May 2 00:33:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
AC connected
$ sudo acpitool -a -b Battery #1 : Discharging, 98.02% AC adapter : online
$ sudo acpitool -B Battery #1 : present Remaining capacity : 50272 mWh, 98.02% Design capacity : 56041 mWh Last full capacity : 51290 mWh, 91.52% of design capacity Capacity loss : 8.478% Present rate : 0 mW Charging state : Discharging Battery type : Li-ion Model number : ASUS
AC disconnected
$ sudo acpitool -a -b Battery #1 : Discharging, 98.02%, 04:23:32 AC adapter : off-line
$ sudo acpitool -B Battery #1 : present Remaining capacity : 50272 mWh, 98.02%, 04:32:25 Design capacity : 56041 mWh Last full capacity : 51290 mWh, 91.52% of design capacity Capacity loss : 8.478% Present rate : 11072 mW Charging state : Discharging Battery type : Li-ion Model number : ASUS
Still reproducible with 4.6.0-040600rc6 -generic:
$ uname -a -generic #201605012031 SMP Mon May 2 00:33:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Linux bnasws02 4.6.0-040600rc6
AC connected
$ sudo acpitool -a -b
Battery #1 : Discharging, 98.02%
AC adapter : online
$ sudo acpitool -B
Battery #1 : present
Remaining capacity : 50272 mWh, 98.02%
Design capacity : 56041 mWh
Last full capacity : 51290 mWh, 91.52% of design capacity
Capacity loss : 8.478%
Present rate : 0 mW
Charging state : Discharging
Battery type : Li-ion
Model number : ASUS
AC disconnected
$ sudo acpitool -a -b
Battery #1 : Discharging, 98.02%, 04:23:32
AC adapter : off-line
$ sudo acpitool -B
Battery #1 : present
Remaining capacity : 50272 mWh, 98.02%, 04:32:25
Design capacity : 56041 mWh
Last full capacity : 51290 mWh, 91.52% of design capacity
Capacity loss : 8.478%
Present rate : 11072 mW
Charging state : Discharging
Battery type : Li-ion
Model number : ASUS