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Comment on Potential Super Cheap Charger - Ikea SJOSS

There is no limit to when it will charge, you can use a lower power charger to extend your runtime - I use my 9V 2A (18W) Pixel 4a charger all the time while playing. Anything higher than 25w will keep you playing indefinitely, as that’s pretty much the limit for what the deck can draw - 15W TDP and 10W for the screen, but obviously if you draw more than your charger can output eventually you will run out of battery.

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helenslunch@feddit.nl ⁨7⁩ ⁨months⁩ ago

Anything higher than 25w will keep you playing indefinitely, as that’s pretty much the limit for what the deck can draw - 15W TDP and 10W for the screen

Not really that simple. There are lots of other things consuming power, but otherwise you’re correct.

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- JohnEdwa@sopuli.xyz ⁨7⁩ ⁨months⁩ ago
  That “10W for the screen” includes them all.
  When you reach the 15W TDP limit with the screen at max brightness (on the LCD version), the OSD will show you drawing about 25 watts, and it’s measuring it directly from the battery. This also matches what people have reported for the power pass-through mode measuring from the wall outlet - once the battery is fully charged the Deck can power itself directly from the charger, and at full tilt, it’s about 25 watts.
  Sure if you really want to start separating them all out there are things like bluetooth, wifi, speaker amplifiers etc, but compared to how much the backlight & screen controller draw, they are pretty much drops in the bucket.
  
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  - helenslunch@feddit.nl ⁨7⁩ ⁨months⁩ ago
    
    That “10W for the screen” includes them all.
    
    No.
    
    once the battery is fully charged the Deck can power itself directly from the charger, and at full tilt, it’s about 25 watts
    
    Yes.
    
    they are pretty much drops in the bucket.
    
    No.
    
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    JohnEdwa@sopuli.xyz ⁨7⁩ ⁨months⁩ ago
    
    That “10W for the screen” includes them all. No.
    
    Taken straight from the LCD deck in front of me: With the screen as dim as possible sitting in the home menu, the total power usage of the deck is 4.9 Watts. The GPU is drawing 0.3 Watts. The CPU is drawing 0.3 Watts. With the screen brightness turned to full but the deck idle, the power draw goes to 7.1 Watts, but the screen stops updating the image after 10 seconds. CPU & GPU are both still at 0.3 watts. Jiggling the stick every few seconds to keep the screen on, the power draw goes to 9.6 Watts. CPU & GPU are still 0.3W each.
    
    Result: The “rest” of the Steam Deck, minus SSD and cooling fan activity at full screen brightness, uses 9 Watts, at least 4.7 Watts of it being the screen and backlight alone, though I was not able to test how much the draw would be of the screen could be turned completely off, as that isn’t possible in SteamOS.
    
    15W + 9W is 24W, we are a watt shy of 25W.
    
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