45w power supply on P650SE working

Discussion in 'Sager and Clevo' started by bernardogo, Feb 8, 2016.

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  1. bernardogo

    bernardogo Notebook Enthusiast

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    Hello,

    I finally managed to make my P650SE work and even charge the battery using a 45w toshiba power supply.
    For this I've tweaked some power profiles that let me have stunning seven hours of battery life.

    The question is: The battery does charge in a good rate from 20 to 98% but then it starts to charge very slowly, drawing only 4w to do so. Can it damage the battery in any way?
     
  2. Meaker@Sager

    Meaker@Sager Company Representative

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    No, slow charging wont hurt the battery, just be very careful as it will be very easy for that machine to spike well above what that brick can deliver.
     
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  3. bernardogo

    bernardogo Notebook Enthusiast

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    What happens in this case?
     
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  4. Brent R.

    Brent R. Notebook Evangelist

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    it will turn off, or mess up the charger...
     
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  5. Meaker@Sager

    Meaker@Sager Company Representative

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    Since it's so over the rating of the PSU worst case the circuitry fries and it sends a burst of power into the notebook and takes it with it.

    A properly designed charger should just take itself out in this case but I tend to not like tempting fate.
     
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  6. bernardogo

    bernardogo Notebook Enthusiast

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    I've just tried to use everything on 100% including the GTX970m, the power supply stops to charge and the laptop uses the battery.
    It only starts to draw energy from the power supply if I disconnect and plug it back.

    It is Delta's, I don't think can be that bad.
     
  7. ldkv

    ldkv Notebook Consultant

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    How did you do to have 7h on battery ? The most I can get from mine (P650SG) is 5h.
     
  8. bernardogo

    bernardogo Notebook Enthusiast

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    • I have removed my HDD and now I'm using only the M.2 SSD.
    • The video card is completely disabled by nvidia-prime. (not bumblebee)
    • Networking is disabled most of the time since I use it to take notes at the class and don't need it, sometimes I turn it on to search for something.
    • Brightness is set a way lower than the minimum allowed. If the screen turns off it can't power it on again unless I increase the brightness then set it to low again.
    • The keyboard back light is off, the fans are running slow most of the time and sometimes I think it is actually off. (See TLP profile)
    • I'm using TuxOnIce for proper hibernation since the original kernel can't do it at all. I don't know if changes anything related to power management.
    • Removed PowerTop and Laptop mode. Installed TLP with the following profile,

    I have changed the TLP profile as follows:

    Code:
    TLP_DEFAULT_MODE=AC
    DISK_IDLE_SECS_ON_BAT=1
    MAX_LOST_WORK_SECS_ON_BAT=60
    CPU_SCALING_GOVERNOR_ON_BAT=powersave
    CPU_SCALING_MIN_FREQ_ON_BAT=800
    CPU_SCALING_MAX_FREQ_ON_BAT=1200
    CPU_MIN_PERF_ON_BAT=0     #PSTATE
    CPU_MAX_PERF_ON_BAT=20
    CPU_BOOST_ON_BAT=0
    SCHED_POWERSAVE_ON_BAT=1 # Minimize number of used CPU cores/hyper-threads under light load conditions
    NMI_WATCHDOG=0
    ENERGY_PERF_POLICY_ON_BAT=powersave
    DISK_APM_LEVEL_ON_BAT="64 64"
    DISK_SPINDOWN_TIMEOUT_ON_BAT="1 2"
    SATA_LINKPWR_ON_BAT=min_power
    PCIE_ASPM_ON_BAT=powersave
    WIFI_PWR_ON_BAT=5
    SOUND_POWER_SAVE_ON_BAT=1
    SOUND_POWER_SAVE_CONTROLLER=Y
    BAY_POWEROFF_ON_BAT=0
    RUNTIME_PM_ON_BAT=auto
    USB_AUTOSUSPEND=1
    RUNTIME_PM_DRIVER_BLACKLIST="radeon nouveau"
    
     
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  9. D.Dastardly

    D.Dastardly Notebook Geek

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    All PSUs have overcurrent protection. When it happens the PSU just turns itself off, or it will limit the current draw.

    Recovery is automatic if the original condition that made the PSU trip is no longer existent. Alternatively it may require a disconnect.
     
  10. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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