Making battery last longer? Underclocking cpu?

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yoshiki2
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Making battery last longer? Underclocking cpu?

Post by yoshiki2 » Sun Feb 04, 2018 2:05 pm

Hey!!
Is there a way to make the battery enter some kind of ultra saver mode?
I got a class that last 3 hours and my battery only lasts 2 or 2 1/4 hours. (Thinkpad e455 with ssd).
Any ideas about what could I do, besides changing brightness?

ralplpcr
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Re: Making battery last longer? Underclocking cpu?

Post by ralplpcr » Sun Feb 04, 2018 2:29 pm

I've had pretty decent results with the TLP power management program. I believe it's part of the repositories starting with the 18 series of Mint, but if you can't find it via the software manager, you can add it via PPA:

Code: Select all

sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp
Once installed, just run sudo tlp start.

That's pretty much it. I would recommend turning your brightness down a bit as well, but the TLP service should help tremendously.

NOTE: PPAs are not officially supported, as they are created/maintained outside of the repositories. This one has been good for me, but you should always exercise caution whenever installing anything outside of the repository.

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Re: Making battery last longer? Underclocking cpu?

Post by Superannuated » Sun Feb 04, 2018 2:49 pm


Petermint
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Re: Making battery last longer? Underclocking cpu?

Post by Petermint » Sun Feb 04, 2018 8:38 pm

Some battery saving ideas depend on what you do. Switching from Cinnamon to Lxde or similar might use less power for graphics. Switching to a lighter Web browser can do the same. Chrome and the latest Firefox preload pages in the background without you requesting them. Switch that off. Noscript can stop the loading of junkware, another power user.

What is running on your machine during the 3 hours? Look in System Monitor. You can switch off the thinks you do not need. Is bluetooth on? Switching off a task might add one minute or five minutes to a battery.

An SSD upgrade might use less power.

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Re: Making battery last longer? Underclocking cpu?

Post by Mute Ant » Sun Feb 04, 2018 8:45 pm

Using 'suspend' as a screen-saver perhaps? SSD have no spin-up time, neither does RAM. Using the dconf-editor package you can set Mint to suspend after 1 minute of inactivity instead of the usual minimum of 10 minutes.

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Re: Making battery last longer? Underclocking cpu?

Post by Dave B » Sun Feb 04, 2018 9:31 pm

Other ideas...
You already mention brightness, so won't mention that one! :)

- Make sure there's adequate ventilation, so CPU and possibly GPU fans can run at a lower rate.

- Clean fans if necessary

- If an Optimus laptop, switch from NVIDIA dGPU to Intel iGPU.

- If possible, use the latest kernel (currently 4.13.0-32), I believe CPU governor improvements were made in, or around, the 4.11. kernel revision, so newer kernels will include those.

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Re: Making battery last longer? Underclocking cpu?

Post by RobertService » Sun Feb 04, 2018 10:52 pm

1. SERIOUSLY consider getting a new battery; specs for this machine are 5-6 hours of battery life without a SSD. It seems as though your battery is approaching its end-of-life (laptop batteries have a useful life of 300-500 charge/discharge cycles).
2. Turn off Bluetooth; B-T chews up a lot of battery power, and comes on by default in most cases.
3. If your assignment(s) don't require wifi, treat that the same as Bluetooth. It uses a lot of power.
4. Most all classrooms have power outlets; take your AC adapter to class with you. Take a long, light-weight extension cord (laptop AC adapters don't consume a lot of power), if necessary.

#4 (first), then #2, then #1 should handle most all your problems.

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Re: Making battery last longer? Underclocking cpu?

Post by Petermint » Mon Feb 05, 2018 1:03 am

That model arrived at the start of 2015. Three years old. If you charge it once per day, that is 1000 charge cycles. Your battery will be down below 50% capacity. A replacement is about $100 in our local shops.

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Re: Making battery last longer? Underclocking cpu?

Post by catweazel » Mon Feb 05, 2018 1:07 am

yoshiki2 wrote:Hey!!
Is there a way to make the battery enter some kind of ultra saver mode?
I got a class that last 3 hours and my battery only lasts 2 or 2 1/4 hours. (Thinkpad e455 with ssd).
Any ideas about what could I do, besides changing brightness?
Get a new, higher capacity battery.
¡uʍop ǝpısdn sı buıɥʇʎɹǝʌǝ os ɐıןɐɹʇsnɐ ɯoɹɟ ɯ,ı

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Re: Making battery last longer? Underclocking cpu?

Post by Termy » Mon Feb 05, 2018 11:55 am

$100 for a new battery!? That's nuts. Try eBay. lol Or Amazon. I would never pay that sorta of money for a laptop battery.

Some cheaper batteries on eBay, so maybe the OP could get one from there.
https://www.ebay.co.uk/sch/items/?_nkw= ... rmvSB=true
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Re: Making battery last longer? Underclocking cpu?

Post by yoshiki2 » Wed Feb 07, 2018 10:22 pm

thanks the script worked

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Re: Making battery last longer? Underclocking cpu?

Post by sdibaja » Wed Feb 07, 2018 10:35 pm

ralplpcr wrote:
Sun Feb 04, 2018 2:29 pm
I've had pretty decent results with the TLP power management program. I believe it's part of the repositories starting with the 18 series of Mint, but if you can't find it via the software manager, you can add it via PPA:

Code: Select all

sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp
Once installed, just run sudo tlp start.

That's pretty much it. I would recommend turning your brightness down a bit as well, but the TLP service should help tremendously.

NOTE: PPAs are not officially supported, as they are created/maintained outside of the repositories. This one has been good for me, but you should always exercise caution whenever installing anything outside of the repository.
isn't TLP in the regular Mint repos?

I agree, avoid all PPAs

PS: do you have Synaptic package manager? if not get it.

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Re: Making battery last longer? Underclocking cpu?

Post by Pierre » Wed Feb 07, 2018 11:07 pm

Termy wrote:
Mon Feb 05, 2018 11:55 am
$100 for a new battery!? That's nuts. Try eBay. lol Or Amazon. I would never pay that sorta of money for a laptop battery.

Some cheaper batteries on eBay, so maybe the OP could get one from there.
you have to be a bit careful about where you do get that Battery.
- I've had mixed results when obtaining some Batteries from eBay in recent times.
most of them, fail rapidly, and usually within 72 hours. :shock:

yet, other folks, seem to do okay.
:?

the thing is, that you probably will be getting a better caliber battery - for that $100.00
- the eBay batteries are pretty flaky, at best.
it would be more prudent to goto a specialist battery shop, for your replacement, rather than eBay itself.
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Re: Making battery last longer? Underclocking cpu?

Post by Petermint » Thu Feb 08, 2018 12:26 am

Lithium batteries burst into flames if the battery design, size, or chemistry does not match charge control chip. As an iPhone owner. :lol:
For that reason, I buy from a local supplier who can be sued for supplying a faulty product.

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Re: Making battery last longer? Underclocking cpu?

Post by RobertService » Thu Feb 08, 2018 7:45 am

"...you have to be a bit careful about where you do get that Battery.
- I've had mixed results when obtaining some Batteries from eBay in recent times.
most of them, fail rapidly, and usually within 72 hours."

Amazon holds all its suppliers to very high standards; I've never had a problem with a battery from Amazon (and I make sure the one I choose has a lot of good reviews); if I ever had a problem, I'd much rather have it with an Amazon-purchased device than one from eBay. (Good luck on getting eBay to help you out getting any relief on a bad product!)

By the way, Amazon's prices for this particular battery range from $40-$50 (new, third-party supplier) to $125.00 for a new, Lenovo battery.

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Re: Making battery last longer? Underclocking cpu?

Post by AZgl1500 » Thu Feb 08, 2018 11:07 am

Termy wrote:
Mon Feb 05, 2018 11:55 am
$100 for a new battery!? That's nuts. Try eBay. lol Or Amazon. I would never pay that sorta of money for a laptop battery.

Some cheaper batteries on eBay, so maybe the OP could get one from there.
https://www.ebay.co.uk/sch/items/?_nkw= ... rmvSB=true
ummmm,

I disagree with you here.

I have tried in the past to get new batteries for my Samsung S5 and Note 4 cellphones from both sources you mentioned.

Every time I did, I received an inferior product.... totally useless from a "long term" lasting battery standpoint.
None of them would charge to 100% after a few cycles of use.

I finally bit the bullet, went down to the local Interstate Batteries brick front store, and paid 10 times the price of the online batteries I had been using.

But, guess what? Both of those batteries are still giving me full service after a year's worth of normal use....

You get what you pay for, literally with batteries.

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Re: Making battery last longer? Underclocking cpu?

Post by Pippin » Thu Feb 08, 2018 11:28 am

Never bought anything from ebay.

My laptop is just over 7 years old, the original 4,4Ah battery lasted just over 2 years.
Two cells out of six where bad, unknown if it was a bms issue or just bad cells, put them in the chemical waste bin.
Original replacement was 93,- euros but,

Then I bought a 8,8Ah on amazon 32,- euros, twelve cells, lasted 4,5 years.
Not bad for 32,- euros...
Bms died, recycled the cells, still in use for other purpose.
Off course with degraded capacity.

Few months ago I bought a 6,6Ah, nine cells, 33,49 euros.
How long this one lasts, I`ll see...
"I'm not in this world to live up your expectations, neither are you here to live up to mine.”
F.P. & P.T.

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Re: Making battery last longer? Underclocking cpu?

Post by Dave B » Thu Feb 08, 2018 2:31 pm

Not only can badly manufactured batteries (or batteries with missing safety features) suffer from thermal runaway. Some can contain fewer cells with lead/metal weights added to make up the weight difference.

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Re: Making battery last longer? Underclocking cpu?

Post by Termy » Thu Feb 08, 2018 4:22 pm

Okay, y'all have a point there with regards to buying 2nd-hand batteries! Totally forgot about that. I guess I would stick with new, from Amazon.
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Re: Making battery last longer? Underclocking cpu?

Post by Mia » Fri Feb 09, 2018 6:26 am

You can use powertop to monitor and manage power consumption. (In particular, you can use 'powertop --auto-tune' to "Set all tunable options to their good setting" according to man page).

I'd also recommend using xbacklight to fine-tune your screen brightness. Maybe you need to get used to "darker" screen at first. But now I set it to 10% brightness most of the time (varying it between 3 and 20% sometimes), and only rarely to 50-100% - to go outside to bright daylight or to view a video or photos.

P.S. You can map keyboard shortcuts to some commands, like

Code: Select all

sh -c 'xbacklight -set 10; xgamma -gamma .6'
or

Code: Select all

sh -c 'xbacklight -set 80; xgamma -gamma 1'

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