Wrong akku / battery power displayed. Netbook swichtes off the hard way

Hi,
my relatively new (~one year..) battery for my netbook shows ca. 40% to 17% power status left, but this is wrong. So in reality the akku is already empty at 40% power status left. And the Netbook switches off the hard way...
(No xfce warning about empty battery and no sleep mode activation...)
Right after a reboot:

acpi -bi
Battery 0: Charging, 32%, 01:34:37 until charged
Battery 0: design capacity 4287 mAh, last full capacity 3862 mAh = 90%

it says that it is already charged at 32%, which cannot be true?
How can i fix this?

Battery:   ID-1: BAT0 charge: 14.7 Wh condition: 42.8/47.5 Wh (90%) model: SANYO L09S6Y14 status: Charging 
inxi
inxi -Fxzc0
System:    Host: pc Kernel: 5.0.5-1-MANJARO x86_64 bits: 64 compiler: gcc v: 8.2.1 Desktop: Xfce 4.13.3 Distro: Manjaro Linux 
Machine:   Type: Laptop System: LENOVO product: Brazos v: Rev 1 serial: <filter> 
           Mobo: LENOVO model: Inagua v: 109-B78210-00A serial: <filter> UEFI: LENOVO v: 4BCN24WW date: 08/10/2011 
Battery:   ID-1: BAT0 charge: 14.7 Wh condition: 42.8/47.5 Wh (90%) model: SANYO L09S6Y14 status: Charging 
CPU:       Topology: Dual Core model: AMD E-450 APU with Radeon HD Graphics bits: 64 type: MCP arch: Bobcat L2 cache: 512 KiB 
           flags: lm nx pae sse sse2 sse3 sse4a ssse3 svm bogomips: 6588 
           Speed: 834 MHz min/max: 825/1650 MHz Core speeds (MHz): 1: 1556 2: 1329 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Wrestler [Radeon HD 6320] vendor: Lenovo driver: radeon v: kernel 
           bus ID: 00:01.0 
           Display: x11 server: X.Org 1.20.4 driver: radeon resolution: 1366x768~60Hz 
           OpenGL: renderer: N/A v: N/A direct render: N/A 
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] Wrestler HDMI Audio vendor: Lenovo driver: snd_hda_intel v: kernel 
           bus ID: 00:01.1 
           Device-2: Advanced Micro Devices [AMD/ATI] SBx00 Azalia vendor: Lenovo driver: snd_hda_intel v: kernel 
           bus ID: 00:14.2 
           Sound Server: ALSA v: k5.0.5-1-MANJARO 
Network:   Device-1: Realtek RTL810xE PCI Express Fast Ethernet vendor: Lenovo driver: r8169 v: kernel port: 1000 
           bus ID: 02:00.0 
           IF: enp2s0 state: down mac: <filter> 
           Device-2: Ralink RT3090 Wireless 802.11n 1T/1R PCIe vendor: Lenovo driver: rt2800pci v: 2.3.0 port: 1000 
           bus ID: 03:00.0 
           IF: wlp3s0 state: up mac: <filter> 
Drives:    Local Storage: total: 232.89 GiB used: 153.79 GiB (66.0%) 
           ID-1: /dev/sda vendor: Samsung model: SSD 860 EVO 250GB size: 232.89 GiB 
Partition: ID-1: / size: 220.43 GiB used: 153.79 GiB (69.8%) fs: ext4 dev: /dev/sda2 
           ID-2: swap-1 size: 7.62 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda3 
Sensors:   System Temperatures: cpu: 57.6 C mobo: 40.0 C gpu: radeon temp: 60 C 
           Fan Speeds (RPM): N/A 
Info:      Processes: 146 Uptime: 10m Memory: 3.46 GiB used: 1.26 GiB (36.5%) Init: systemd Compilers: gcc: 8.2.1 Shell: bash 
           v: 5.0.2 inxi: 3.0.32 

reading this:


LF

This sounds typical for a battery where some of the cells have died.

The OS has no way of knowing when cells have died as it reports what the battery information says.

So yes, a laptop with a dead cell or two, would probably switch off at around 40% battery left.

Reading through the forum, i am afraid i have to agree.
Hmm.. maybe some cycling wil help?
Or can i change the load-mode which capacity is left?

after one re-cycle

acpi -bi
Battery 0: Full, 100%
Battery 0: design capacity 3823 mAh, last full capacity 3444 mAh = 90%

cat acpi.txt 
Battery 0: Discharging, 45%, 01:21:11 remaining
Battery 0: design capacity 4588 mAh, last full capacity 4133 mAh = 90%

LF

I bought a new battery and the laptop still dies at 40-41% indication. :confused:

With disabled wlan the pc was running 5 hours at idle, battery status at 50%. Than swichting wlan on, in e.g.15 min it went down at 17% battery status.

Is the wlan driver, draining that much ampere's?

Wi-Fi uses a significant amount of power, but it should be less than the power consumed by the screen or CPU. It should not cause your battery life to decrease from 50% drain in 5 hours to 17% drain in 15 minutes. Drawing that much power would probably make your battery really hot and might even start a fire depending on the battery. A new battery may need a few charge cycles for the computer to be able to accurately read values because the circuits have been calibrated for the old one.

I did one cycling: Fully emptied, fully recharged, fully emptied, recharged again.
Although it showed: last full capacity 58%

Now the battery is empty at 8%, which seems to be ok.
Lets see how long this lasts..

LF

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