Newbie question about current users hardware running GIMPS

[Madpoo]

Originally Posted by ric

A number of recent laptops (Dell comes to my mind, likely other producers as well) have a BIOS profile "always plugged in" to somehow preserve battery life. FWIW, I've a positive feedback on this, after 2.5 yrs of continuous usage.

Thinkpads (to the best of my knowledge) also have smart charging, where it basically ignores the battery until the charge drops below something like 93%. It doesn't try to constantly keep it topped off.

[storm5510]

Originally Posted by Madpoo

Thinkpads (to the best of my knowledge) also have smart charging, where it basically ignores the battery until the charge drops below something like 93%. It doesn't try to constantly keep it topped off.

This makes sense. The charge light on my phone goes green at 90%. It displays a message saying disconnect it.

[henryzz]

For battery health I believe it is best to cycle between 40 and 80% on Lithium ion batteries. I wish phones would help you do that. I certainly hate the continual charging at 100% that many seem to do.

[retina]

Originally Posted by henryzz

For battery health I believe it is best to cycle between 40 and 80% on Lithium ion batteries. I wish phones would help you do that. I certainly hate the continual charging at 100% that many seem to do.

But then everyone would complain about not getting the full value out of their shiny new tracking spying device phone. Also how would the manufacturers sell shiny new phones every year if the old ones lasted for too long.

[henryzz]

Originally Posted by retina

But then everyone would complain about not getting the full value out of their shiny new tracking spying device phone. Also how would the manufacturers sell shiny new phones every year if the old ones lasted for too long.

The reduction in battery life would be an issue currently I admit. Things like wireless charging and super fast charging should reduce our reliance on raw capacity. It should be possible to fully use the battery when needed. I imagine that this shouldn't be necessary for a lot of people on a day to day basis.
Of course super fast charging would need balancing against this sort of method. It also presently covers a slightly different range of charge in some implementations.

[Madpoo]

Originally Posted by henryzz

The reduction in battery life would be an issue currently I admit. Things like wireless charging and super fast charging should reduce our reliance on raw capacity. It should be possible to fully use the battery when needed. I imagine that this shouldn't be necessary for a lot of people on a day to day basis.
Of course super fast charging would need balancing against this sort of method. It also presently covers a slightly different range of charge in some implementations.

I used to keep my phones plugged in here and there through the day to "top it off". Now with the latest Galaxy S7/S8 and the awesome fast charging, I don't bother. I know that if it gets low enough earlier in the day, I can pop it on the fast charger and be back in business in 45-60 minutes... less if I only wanted to juice it a bit more for the final few hours of the day before it goes to it's nighttime home on my fast-charging wireless pad.

[VictordeHolland]

Originally Posted by Madpoo

I used to keep my phones plugged in here and there through the day to "top it off". Now with the latest Galaxy S7/S8 and the awesome fast charging, I don't bother.

Storing/keeping Li-ion batteries at their maximum charge/voltage is bad for battery capacity.

Exposing the battery to high temperature and dwelling in a full state-of-charge for an extended time can be more stressful than cycling

http://batteryuniversity.com/learn/a...ased_batteries

For prolonged battery life, electric vehicles use a State of Charge between 85-20%

V/cell - discharge cycles before reaching 70% capacity - stored energy
4.25V 200–350 105-110%
4.20V 300–500 100%
4.15V 400–700 90–95%
4.10V 600–1,000 85–90%

My Samsung Galaxy S7edge reads 4311mV when charged to 100% after disconnecting the charger, which is extremely high for Li-ion (and destroys battery life). I also use the Fast Charging feature, the phone gets quite warm when fast charging, which also doesn't help battery life. It would be better to disconnect the charger at 80-85% (4.1V) and not use Fast Charging, but who cares, after 2 years I usually buy/get a new phone anyway . I had a Galaxy S6 before my S7edge and going from 2550mAh to 3600mAh was quite noticeable. The S6 was usually almost empty at the end of the day, while with the S7edge I usually have 20-25% remaining.

[retina]

Originally Posted by VictordeHolland

My Samsung Galaxy S7edge reads 4311mV when charged to 100% after disconnecting the charger, which is extremely high for Li-ion (and destroys battery life).

Some Li battery chemistries allow for 4.35v fully charged. So that might be normal for your battery.

[Xyzzy]

Originally Posted by VictordeHolland

I also use the Fast Charging feature, the phone gets quite warm when fast charging, which also doesn't help battery life.

We purposely use the older 5W charging cubes instead of the new 15W ones for charging our iPhone and iPad. We get enough battery life to use the devices all day so taking longer to charge at night is no big deal.

[aurashift]

Originally Posted by Xyzzy

We purposely use the older 5W charging cubes instead of the new 15W ones for charging our iPhone and iPad. We get enough battery life to use the devices all day so taking longer to charge at night is no big deal.

The 5W cubes won't even power an ipad pro 12", so I've said F it and am running mostly 12W and one 30W for quick emergencies.