Microsoft Surface 3 battery charging time
About 4 hours from less than 10% battery. That's about one hour slower than my Surface Pro 2 with its custom charger at the same level.
...
I've always used the charger and cable that came with the Surface 3 and I have not seen any terrible charging times. I went from 5% to full in under 4 hours yesterday. I wasn't using the Surface during charging, so I'm sure that helped. But 4 hours for a full charge seems acceptable. Is it the fastest charging device I own? Definitely not. But I don't think it is that slow to be considered an issue.
...
Finally drained the battery on my Surface 3 today (wouldn't even turn on, battery symbol would flash on the screen). Charged it for 2 hours 45 minutes and was at 85%, took an additional hour to get to 100%, so roughly 3 hours 45 minutes from dead to full charge while the Surface is turned off. Not too bad at all IMHO.
source:
https://forums.windowscentral.com/microsoft-surface-3/355747-surface-3-battery-life-charging-times.html
Battery report
Overigens kun je een rapportje trekken van je accugebruik. In een 'elevated' command prompt geef je volgend commando:
powercfg /batteryreport /output "C:\battery_report.html"
of zelfs een uitgebreide studie:
powercfg /sleepstudy /output "C:\sleepstudy.html"
In praktijk
96%-95%_78%
datum |
3h |
7h30 |
18h30 |
26/08/'19 |
100% |
95% |
77% |
27/08/'19 |
100% |
97% (6h20) |
|
28/08/'19 |
|
|
79% |
30/08/'19 |
|
|
80% |
'Over time', de laadtijd neemt niet toe, maar het 'dischargen' gaat sneller.
datum |
3h |
18h37-19h28 |
17/01/'21 |
100% |
65% |
18/01/'21 |
100% |
69% |
19/01/'21 |
100% |
68% |
So I've added a scheduled task that shuts the tablet down at night.
timestamp |
capacity remaining |
22/01/'21 18:38 |
97% |
A side-effect is that upon restart, the wifi connection is not always re-established. So I wrote a small startup script that checks if the connection is established, and if not, establish the connection:
ipconfig|find/i "123.456.789." && rundll32 || netsh wlan connect name=... ssid=...
This is a good solution, but once in a while, the laptop has been active during the day, e.g. after patch Tuesday:
- 11/02/'21 05:19:11: 94%
- 11/02/'21 18:17:53: 68%
I found the following article,
https://www.reddit.com/r/Surface/comments/40cq4i/surface_3_battery_drain_and_sleep_study/, and have now:
- disabled the 'wake by pattern match' setting of the wireless adapter
- disabled the scheduled task that shuts down the tablet at night
I'm curious what the result will be.
That's a lot of drain. So I'm going to
- re-enable the 'wake by pattern match' setting of the wireless adapter
- re-enable the scheduled task that shuts down the tablet at night (23.30) and finetune it:
- to repeat the task every 7 hours
- for a duration of 8 hours
- stop all running tasks at end of repetition duration
I suppose this will be of some help.