News for hackers. Stuff that matters.

A comment on Pinebook: An Affordable 64-bit ARM based Open Source Notebook. Parent comment

Re:Pinebook: An Affordable 64-bit ARM based Open Source Note... by zaarn on Wednesday April 18, 2018 @03:58AM (#16865571)
What is the actual battery life?

If it has a decent one (atleast 12 hours) I could use it as a travel notebook instead of my hefty thinkpad.

[ Parent | on HN ]
Re:Pinebook: An Affordable 64-bit ARM based Open Source Note... by pizza234 on Wednesday April 18, 2018 @07:05AM (#16866277)
A quad core A53 consumes around 2W when idle. The battery is 37Wh, so I don't think it can make 12 hours (including screen consumption).
[ Parent | on HN ]
Re:Pinebook: An Affordable 64-bit ARM based Open Source Note... by srcmap on Wednesday April 18, 2018 @11:02AM (#16867911)
2W when idle is very high.

Are you sure it is just the Core A53 or is it measured in power/battery connection which account for the display, wifi, DDR, IO, etc?

I did power profile for cellphone SOC couple years ago. Typical power usage for CPU is very low - milli-watts or less range for IDLE, worst case 1-2 W at full performance mode OP (Operating Point).

When I profiled it, the Display, Wifi module consumed a lot more power than CPU/SOC during "normal" operations.

[ Parent | on HN ]
Re:Pinebook: An Affordable 64-bit ARM based Open Source Note... by pizza234 on Wednesday April 18, 2018 @03:44PM (#16870446)
I surely used the wrong term - I meant that the entire board consumes around 2W in idle/light workload.

I can't guarantee about the precision; 2W may be 1.5W or 2.5W on my tool (it doesn't have decimals), although, I've measured my XU4 consumption, and it's consistent with third party measurements (5W on idle).

[ Parent | on HN ]