45w power supply on P650SE working

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?

 

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.

 

What happens in this case?

 

it will turn off, or mess up the charger...

 

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.

 

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.

 

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

 

• 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"

 

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.

 

While that's generally true for laptops - it's not always true for desktops: http://www.legitreviews.com/intel-x99-motherboard-goes-up-in-smoke-for-reasons-unknown_150008

 

ATX PSU must follow the same standard. From the link provided, the author of the article was not aware that he must set the over current limits to the digital psu, hence the sudden surge.

Oh, and the PSU was not the culprit.

We have determined the primary cause of failure for the pre-production ASUS X99 Deluxe you were testing on September 6, 2014 along with a secondary cause gathered during the investigation phase. Our initial analysis of the VRM Phase-4 MOSFET/Driver package failure is a bad solder point that was also present at the VRM Phase-3 location resulting in the failure you described along with the presence of solder balls. Additional analyses lead us to believe this was the secondary cause for the failure described.​

 

It makes a lot of sense. Mine seems to just turn off and seems to randomly be able to recover automatically or not. Maybe it depends on the energy drawn before turning off.

 

Hmz, those pads will have solder on them actually in that link

However while power supplies should have protection it's a bit like saying that your car has airbags so why drive carefully?