Battery life

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Battery life

Unread postby davidknight247 » Mon Jul 09, 2018 4:51 pm

My camping trip is approaching and I intend to be able to play SMS games for two weeks in the evening for an hour or two without charging the device. So we need at least 24hours battery life.

As a test I compiled SMS with minimal backlight (set to 1), sound muted, 160MHz and power management settings.

The device has been cycling the Aladdin intro now for 11 hours.

Place your bets!
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Re: Battery life

Unread postby jpxdude » Mon Jul 09, 2018 5:00 pm

It obviously depends on both the emulator and games as well, but SMS is quite light on the ODroid-Go. I probably get 8ish hours of GBC play (Pokemon Crystal).

I think you can eke out 36 hours! Good luck!
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Re: Battery life

Unread postby odroid » Mon Jul 09, 2018 5:09 pm

Super Mario Bros Deluxe on GBC with full backlight brightness without sound, I could play around 7 hours.
I think I can play GBC games ~10 hours if I lower the backlight to level 1.

This type of ~5000mAh power bank($10) should be enough for continuous 48hours battery life.
https://www.amazon.com/gp/product/B07CYNBNVW/
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Re: Battery life

Unread postby davidknight247 » Mon Jul 09, 2018 5:53 pm

odroid wrote:Super Mario Bros Deluxe on GBC with full backlight brightness without sound, I could play around 7 hours.
I think I can play GBC games ~10 hours if I lower the backlight to level 1.

This type of ~5000mAh power bank($10) should be enough for continuous 48hours battery life.
https://www.amazon.com/gp/product/B07CYNBNVW/


Now where’s the fun in that? ;-)

Almost 12 hours now...
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Re: Battery life

Unread postby davidknight247 » Mon Jul 09, 2018 7:40 pm

odroid wrote:I think I can play GBC games ~10 hours if I lower the backlight to level 1.


To clarify here level 1 backlight is coded as “10” in the code. I changed this to “1” so the screen brightness is very very dim. However for my use case this is advantageous as I do not want to disturb my family at night and it is perfectly usable at night at this level.

I tested 80MHz and 160MHz frequencies. 80MHz is too slow for SMS emulation. 160MHz is playable with sound issues but that’s not an issue as the volume is muted. I haven’t tried to optimise the code yet but I recently created faster sound code so may try this to see if it resolves the sound issues at this frequency.

Still going at 14 hours...
[edit] 16 hours...
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Re: Battery life

Unread postby davidknight247 » Mon Jul 09, 2018 11:20 pm

The blue light is flashing at 17 hours and 17minutes indicating we’re down to 2% battery.

(Edit) Despite the blue light of doom we’ve just passed the 18 hour mark!
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Re: Battery life

Unread postby davidknight247 » Tue Jul 10, 2018 1:13 am

Finally we have a constant blue light and the system has shut down after 19 hours and 7 minutes. Not bad for a 1200mAh battery!

Hardkernel you need to change your marketing, this device can run for 19 hours on a single charge :lol:
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Re: Battery life

Unread postby rooted » Tue Jul 10, 2018 1:34 am

davidknight247 wrote:Finally we have a constant blue light and the system has shut down after 19 hours and 7 minutes. Not bad for a 1200mAh battery!

Hardkernel you need to change your marketing, this device can run for 19 hours on a single charge [emoji38]
Nice test, interesting stuff :)
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Re: Battery life

Unread postby odroid » Tue Jul 10, 2018 11:56 am

Indeed, very impressive energy squeezing test. :D
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