Thanks for the numbers. At least we can see that battery runtime should not suffer too much and will also not be much better.
The measurements would be much more informative if we could get real a world battery runtime with a specified testing environment. I’ve said it before and measuring the power draw is not precise enough because it’s only the power draw at a specific moment of time that could also be influenced by the operating system, background tasks, update checks and whatever else.
Just an example: Notebookcheck also measures the power draw in every review, but those number never add up with the measured battery runtimes and this fact can be easily calculated:
- battery capacity: 60 Wh
- idle minimum: 4.1 W
- idle runtime (lowest brightness, no wireless): 18h 28m
Numbers are taken from review of new Dell XPS 13 with Kabylake-R (Link), but this can be done for every single review on that page.
Now this is the problem with the numbers:
- If the minimum power draw would indeed be 4.1 W the battery would need to have at least 75.85 Wh to last 18.5 hours.
- But it’s only 60 Wh.
- So the minimum power draw must be lower to allow for the measured runtime. Obviously the way to measure the power draw was not precise enough and did not output the real minimum power draw.
- Even the average power draw over those 18.5 hours was lower: 3,24 W
- Measuring power draw (at a specific point of time or even over a shorter period of time) is not precise enough.
- Measuring a full discharge and stopping the resulting runtime with an identical test setup would rule out those problems and give a more valid result.
So what I would propse is to make a more useful test and compare the two SSDs with PCMark battery test.
But I guess nobody will have the time to do this?
Well… if you send me a prototype and both SSDs…