Battery Life Question - Surface Pro 4

Dell / Inspiron one 2320
August 13, 2019 at 12:13:12
Specs: Windows 7, 3.3 GHz / 4001 MB
(If this belongs in the Hardware forum, let me know and I'll move it)

For the past 6 months, I've been using a Surface Pro 4 running Windows 10 for presentations at work. I don't know the history of the unit other than it wasn't new when I got it. No one knew the password (long story) so I took it to a shop and they wiped it clean and did a fresh install of Windows 10.

It gets used maybe twice a month for a 6-8 hours total. When I'm done using it, I just close the cover and put it in it's case.

The last few times I've used it, I noticed that the battery has been dead or almost dead when I start it up. As a test, I checked it last night before I put it away and it was at 95%. About 12 hours later it was at 69%.

Is it normal for a Surface Pro 4 to lose ~28% of it's charge after 12 hours of being closed and doing nothing? Should I continue to expect it to be dead after a couple of weeks of no use?

Thanks!

message edited by DerbyDad03


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#1
August 13, 2019 at 14:30:59
"Is it normal for a Surface Pro 4 to lose ~28% of it's charge after 12 hours of being closed and doing nothing?"

Unless someone used preschoolers to design the battery circuit, no unpowered device should lose that much of a charge over 12 hours. Either the batteries need changing or something is wrong with the battery measuring/charging circuit. Other than that, there's something not turning completely off when you're shutting the unit down.

"Channeling the spirit of jboy..."

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#2
August 13, 2019 at 16:32:39
If you're closing the lid without powering down, the laptop is not "doing nothing".

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#3
August 13, 2019 at 19:36:52
So what's it doing, with usually nothing more than a PDF open, that uses 28% of the power in 12 hours?

It's not like I'm mining Bitcoin. ;-)

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Related Solutions

#4
August 13, 2019 at 21:11:50
Manage your open apps so little is running in the background.
Go to your power settings, make sure that when they reinstalled Windows the power settings are or a laptop and not a desktop. Laptop power default settings should be fine but you can look at the advanced settings to see if there are other settings that might help. You can select what happens when the lid is closed like hibernation, sleep, hybrid sleep, shut down, etc.
You can uninstall programs that you never use and that may minimize programs that may be running in the background. Google any program you are not sure about to see if it is necessary.
Check to make sure you have the latest drivers for your hardware from the manufactures site.

You have to be a little bit crazy to keep you from going insane.


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#5
August 14, 2019 at 05:44:02
I wouldn't preclude the battery totally from the equation. There is a possibility of internal leakage (current) between cells.

Always pop back and let us know the outcome - thanks


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#6
August 14, 2019 at 21:21:16
"I wouldn't preclude the battery totally from the equation. There is a possibility of internal leakage (current) between cells."
Or a shorted cell.

You have to be a little bit crazy to keep you from going insane.


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#7
August 15, 2019 at 05:11:12

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#8
August 16, 2019 at 11:01:04
Update: The unit had been sitting in it's case for about 72 hours. It was probably at or very near 100% when I put it away. When I opened it up today it was at 94%.

I don't think that it was doing/running anything different this time vs. the times when it lost it's charge very quickly, but I can't say for sure.

I guess I'll just have to keep an eye on it. It's not a major issue since I don't ever use it where I don't have power, but it just seemed strange that it kept losing it's charge.

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#9
August 16, 2019 at 11:14:29
Is it possible that it didn't go to sleep when you closed the lid?

It might be as dumb as the switch not getting pushed far enough.

You'd probably see light from the screen when in a dark room.

-- Jeff, in Minneapolis


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#10
August 18, 2019 at 16:19:26
re: "You'd probably see light from the screen when in a dark room."

I'll have to get someone else to check that for me. I'm afraid of the dark.

Oh, wait...if it didn't go to sleep the light will be on and it won't be dark. But what if it did go to sleep? Then it will be dark and I'll be terrified.

I don't know what to do.

I guess I'm afraid of making decisions too.

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#11
August 19, 2019 at 22:59:29
Maybe your laptop is afraid of the dark, too, so it
can't get to sleep.

That seems like the most logical explanation.

My laptop is in my bedroom, not far from my bed, so
I know what it is doing after the lights go out.

Man, there are a LOT of LEDs in here! Some blinking!
Two laptops, a power brick, a power strip with a green
LED and an orange neon light, a smoke detector, and
the evil, demonic cable TV box with a red light on the
back and a blue light on the front that flashes at 3AM.

-- Jeff, in Minneapolis


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#12
August 20, 2019 at 16:04:35
"Update: The unit had been sitting in it's case for about 72 hours. It was probably at or very near 100% when I put it away. When I opened it up today it was at 94%."

I have noticed that many devices when they are just about charged and shifting from regular charge to trickle charge will show 100% but if you unplug them they will show 2-6 points lower after only 5 or 10 minutes. If you leave it on the trickle charge for at least another hour or two, it will really reach the 100% charge and then it will stay that way much longer if not used. Worth a try.

Even if it looses 6 percent after 3 days, that is not unreasonable.

You have to be a little bit crazy to keep you from going insane.


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#13
August 22, 2019 at 11:07:31
re: "Even if it looses 6 percent after 3 days, that is not unreasonable."

Oh I agree. My main point there was that it didn't loose the 28% in 12 hours like it had a few days earlier.

I'll keep an eye on it, but since it's a device that only gets used once or twice a month and can be plugged in whenever it is used, I'm not going to put a lot time, and certainly no money, into solving the issue.

Thanks to all for the suggestions.

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