Windows 8 and 8.1 Forums


Laptop Runs Poorly When On Battery

  1. #1


    England
    Posts : 20
    Windows 8.1 Pro 64-bit

    Laptop Runs Poorly When On Battery


    Hi everyone,

    I've recently acquired a Scan 3XS LG15 laptop and with its GTX 680M it runs games like Assassin's Creed III maxed out very well, but only when plugged in. The drop in performance happens as soon as it's unplugged, and speeds up again once plugged in.

    When on battery games run very badly indeed. I'm not sure whether this is down to the game running on the Intel HD Graphics 4000 or whether it is just not switching to a higher power state.

    I've also checked windows power profiles and nothing seems out of place. Nvidia Contol Panel has been set to always use the GPU and the prefer maximum performance. It doesn't seem to make any difference.

    I think there's something called Optimus that changes profile depending on what you're doing, but I haven't noticed this working.

    If anyone could give me a hand, it would be much appreciated.

    Thanks,

    Daniel

      My System SpecsSystem Spec

  2. #2


    Try changing it to high performance mode.

    When your on battery mode click on the battery in the task bar and select more power options, then open "Hide additional plans" and select High Performance. This will lower battery life, but should help.
      My System SpecsSystem Spec

  3. #3


    Orbiting the Moon
    Posts : 2,975
    Windows 10 x64


    The unplugged battery mode isn't made for playing games!

    Always play plugged-in. If you intend to play / keep plugged-in for a long time, remove the battery.

    The lower consumption balanced or power saver modes apply when on battery. If you play and use high performance on battery, then you will kill your battery sooner than expected, but I leave that up to you to find out.
      My System SpecsSystem Spec

  4. #4


    England
    Posts : 20
    Windows 8.1 Pro 64-bit


    Quote Originally Posted by reconrey View Post
    Try changing it to high performance mode.
    Thanks, but I've already tried this. That's what I meant by saying I "checked Windows power profiles" - sorry if that wasn't clear.

    Thanks!
      My System SpecsSystem Spec

  5. #5


    England
    Posts : 20
    Windows 8.1 Pro 64-bit


    Quote Originally Posted by Hopachi View Post
    The unplugged battery mode isn't made for playing games!
    Unfortunately mains power isn't available everywhere so I'm forced to run off battery in the plane or the car. It's also nice to sometimes lounge around without being tethered to the wall.

    I am also aware of how to charge my laptop.

    As with the last post, the performance power plan makes no difference.

    Thanks...
      My System SpecsSystem Spec

  6. #6


    Hafnarfjörður IS
    Posts : 4,376
    Linux Centos 7, W8.1, W7, W2K3 Server W10


    Quote Originally Posted by Daniel DC88 View Post
    Quote Originally Posted by Hopachi View Post
    The unplugged battery mode isn't made for playing games!
    Unfortunately mains power isn't available everywhere so I'm forced to run off battery in the plane or the car. It's also nice to sometimes lounge around without being tethered to the wall.

    I am also aware of how to charge my laptop.

    As with the last post, the performance power plan makes no difference.

    Thanks...
    Hi there

    When on Battery the power supply in the laptop is inhibited from delivering maximum power -- especially when gaming as the video will really KILL the battery. The battery cannot deliver the same wattage (power) output as the computer can when powered directly from the mains unless the battery is brand new -- and if you do this the battery will age very rapidly indeed.

    If the battery is old as well its internal resistance is higher - also making delivery of a suitable output power impossible -- Basic Physics -- Ohms Law !!. -- For those who have forgottten basic physics here it is again.

    Ohm's law - Wikipedia, the free encyclopedia

    On Mains this restriction is lifted -- the power supply can deliver maximum watts. (Internal resistance is negligible --or should be !!).

    In car it's quite easy to get a DC==>DC inverter for your laptop. Most laptops run at 17 or 20 V DC. A standard cigar lighter from a car socket is 12V DC -- so get a 12==>17/20 V inverter.

    (You can also get an AC adapter for your car -- this will provide 120 (US) or 220 V (Europe) at sufficient wattage to run your laptop -- but this IMO is a waste since the laptop will transform that down to +17V anyway --so just go directly for the 17V inverter).

    For planes it's a different story -- very few (unless you can travel First Class) have anything approaching power sockets -- especially not in "Cattle class" or Coach. -- Been there -- done this -- I've probably travelled on more planes than most people SEE in their lifetime.

    Take an E-reader while you are on the plane -- probably good for you to have a break from Music and games for a few hours and get your mind round a good book.

    Cheers
    jimbo
      My System SpecsSystem Spec

  7. #7


    England
    Posts : 20
    Windows 8.1 Pro 64-bit


    Quote Originally Posted by jimbo45 View Post
    When on Battery the power supply in the laptop is inhibited from delivering maximum power
    Hi Jimbo,

    That seems to make sense, but it doesn't explain why the game drops from over sixty to less than ten frames a second.

    I know all too well about cattle class - I fly to and from Spain about four to six times on Ryanair!

    I have considered an AC adapter but the idea of being to move around my college house is the main reason I want to use the laptop without the charger. Although I'm not sure the 12V could charge a laptop properly, since they struggle to charge my phone!

    Thank you for the Kindle idea, but last time I checked, this was a computer forum - not a women's lifestyle & health blog!

    Nevertheless cheers for the other advice!
      My System SpecsSystem Spec

  8. #8


    South Coast NSW, Australia
    Posts : 615
    Windows 8.1 'Ultimate' RTM 64 bit (Pro/WMC).


    Mine has dual graphics (Intel 3000 and a GeForce GT555M) and it ALWAYS defaults to the Intel chip when on battery, to save power.
    Even if the GeForce is selected as the primary GFX card.
    I get 6.5 hours or thereabouts from this i7 2670QM desktop-replacement. I'm happy with that. And i don't notice any real performance
    drop except on games which are VERY graphics-intensive.
    Hope this helps someone.
    Wenda.
      My System SpecsSystem Spec

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