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[GUIDE] Prolonging battery life cycle

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By ottomanhero, Senior Member on 23rd April 2015, 01:07 PM
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With my older phone LG P880 I had a fat battery after 2 years of usage and it had very degraded capacity.
Since this phone has an unremoveable battery I did some research to prevent de javu.
So I'll be sharing uncommon tips and tricks to prolong your battery to keep you going for up to 4 years and to preserve it's capacity for longer.
Remember, your battery is like a machine.The more you demand and the more you stress it the shorter it's life will be.

Definitions
Life Cycle --> Amount of charges/discharges your battery will survive through before it's unuseable.
mV --> Voltage of your battery.It increases as you charge and decreases as your discharge.This means a charged battery has higher mV than a discharged battery.There are lowest and highest thresholds to mV that play a key role in prolonging battery life cycle.
Capacity --> 3200 mAH by default for our batteries.Lowers over time due to wear.
Battery Wear --> Batteries wear down over time.A battery that is weared down will have less capacity and less life cycle left compared to a factory new battery.This guide's ambition is to preserve higher capacities for longer and increase life cycle.


mV and Percentages

For our phone mV/Percentage can be seen below.
-->4.3 mV is 100% Charging to this level is like overcharging your battery.Wears the battery down noticeably.ESPECIALLYif you charge your phone over the night, it's a battery killer.
-->3.9 mV is 60% Charging to this level is like using your battery the way it was meant to be used.Prolongs battery life noticeably but come on, which one of you can leave the house with 60% juice in your battery? We'll try to avoid this percentage while reducing wear.
-->3.2 mV is 15% You should avoid discharging below this level as it will fasten wear.

What max. Percentage should I charge to?

-->4.1 mV is 80%-85% and it is said to double battery life cycle as compared to 100%.The 20%-15% tradeoff is totally worth it in long term and it's not as low as 60%.
Sure, you can charge to 100% if you are going on a long trip or you need the extra 20% juice.Thanks to sony we've got great battery life already so for daily usage 80% should do.
-->To make it easy and get notified when phone is charged to 85%, use this freely avaliable app.You can choose the percentage yourself and it even shows voltage values.
https://play.google.com/store/apps/d...atterynotifier
Usage :
Open the app up > settings > battery charged settings > tick notify by percent > tap on percent of charge.Remember to launch the app before charging your phone.

Other important factors that effect battery life cycle :
The percentage to start charging at
You don't need to wait for your phone to discharge all the way down to 15%.Infact, recharging your phone and keep it between 40% - 80% where possible increases your battery's life cycle.Because you put less stress on the battery this way which reduces wear.
Temperature
Li ions are known to have problems with difficult environmental conditions.Now there are some li ions with different chemistry which adapt nicely but they are used by military and stuff and not phones because they have tradeoffs.
Temperature can wear down your battery way faster than the cases above.Avoid heat at all times, to do so :
-->Charge your battery at cooler temperatures.Now room temps would do fine (try to not go below 10 C), just find the coolest room you can find and charge it.
-->Never use your phone while it's being charged.When a battery is getting charged and if you use your phone at the same time, you are basically charging and discharging at the same time which wears it down real quick.Also generates heat.
-->Never play demanding games under sunlight/in hot environments.Playing games alone does a good job heating the battery, sunlight added it's like frying your battery.

Calibrating Battery
Image below only for mass effect fans :
Sorry, couldn't resist! <img src=" title="Sorry, couldn't resist! " />

Batteries get inaccurate about percentage and voltage over time.Mostly noticeable after two months of no calibration.However, calibrating once per 3 months should do fine.
-->Discharge your phone to 0% once per 3 months.It recalibrates it.Now you might ask "doesn't that increase wear?" It indeed does but without calibrating your phone at all you might aswell be only using 70-80% of your phone's actual battery capacity.


Sorry for repeating myself but remember, your battery is like a machine.The more you demand and the more you stress it the shorter it's life will be.

Sources : http://en.wikipedia.org/wiki/Lithium-ion_battery and http://batteryuniversity.com/learn/a...ased_batteries

Further proof that this post is not bullsh*t: http://www.xperiablog.net/2016/06/20...-23-5-a-1-238/
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23rd April 2015, 01:48 PM |#2  
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Thanks for the guide and the good explanations

I just think it would be interesting to give your sources since there is a lot of false information on this topic.
23rd April 2015, 07:11 PM |#3  
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Quote:
Originally Posted by pec0ra

Thanks for the guide and the good explanations

I just think it would be interesting to give your sources since there is a lot of false information on this topic.

OP updated with source

EDIT : OP updated with detailed info, few tricks added
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24th April 2015, 01:50 AM |#4  
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Nice.
Now if we just had two Z2 one charged from 0-100 and another from 20-80 for over 2 years, then we could see the difference.

If we just had something like THIS not from 2010 but 2015 with 3200mAh Battery from Sony.
24th April 2015, 07:05 AM |#5  
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I believe in stressing the battery by charging it fully to 100%. I always charge at night until morning. The sweet spot for is 90. Sony created Li-ion batteries if I'm not mistaken and they know a lot about batteries. That's the reason why Sony phone's light indicator turns green when 90% charged already.

Sent from my D6503 using XDA Free mobile app
24th April 2015, 02:08 PM |#6  
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thanks that was some really useful information
24th April 2015, 04:47 PM |#7  
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Quote:
Originally Posted by Haldi4803

Nice.
Now if we just had two Z2 one charged from 0-100 and another from 20-80 for over 2 years, then we could see the difference.

If we just had something like THIS not from 2010 but 2015 with 3200mAh Battery from Sony.

No offense but you're just being a sony fanboy here.Battery tech is the slowliest proceeding tech out of every other components' and battery quality is averagely the same with the exception of some very low level products.Even so, in the article over there in battery university it says that those 1500 mAh batteries were made for smartphones and brand new.

Cropped from sony xperia z2 'environmental' (can be found on sony website) :

Quote from Wiki :
(LiPo = Lithium ion polymer)
Quote:

Safety
LiPo cells are affected by the same problems as other lithium-ion cells. This means that overcharge, over-discharge, over-temperature, short circuit, crush and nail penetration may all result in a catastrophic failure, including the pouch rupturing, the electrolyte leaking, and fire.[21]

All Li-ion cells expand at high levels of state of charge (SOC) or over-charge, due to slight vaporisation of the electrolyte. This may result in delamination, and thus bad contact of the internal layers of the cell, which in turn brings diminished reliability and overall cycle life of the cell.[12] This is very noticeable for LiPos, which can visibly inflate due to lack of a hard case to contain their expansion...

P.S: Feel free to proceed with buying two xperia Z2's and charging them differently though, you may discover something new that every sciencist on the world couldn't.
24th April 2015, 07:46 PM |#8  
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Quote:
Originally Posted by ottomanhero

.Even so, in the article over there in battery university it says that those 1500 mAh batteries were made for smartphones and brand new.
P.S: Feel free to proceed with buying two xperia Z2's and charging them differently though, you may discover something new that every sciencist on the world couldn't.

I've had one of those 1500mAh Batteries in my X10
Compared to the Z2 battery the capacity has increased by 2.1 while I doubt that the volume has increased by 2.1x!

I believe that this "good usage" will increase battery life. Yet I'd love to know by how much exactly. 10%? 15% 20%?
Just "better" doesn't satisfy me

Sadly the cost for good testing equipment easily overwhelms the cost of 2 Xperia Z2 ^^

BTW, according to Kernel Adiutor:
5% is 3.6V
1% is 3.4V
You might want to check that.

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Edit:
Here we also have the Voltage when fully charged.
While plugged 4.3V
After unplugging, more like 4.2V

25th April 2015, 01:01 PM |#9  
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Yes, 4.2 mV is the safe highest voltage for use, however charging till 4.1 mV is lot better for prolonging battery life.Also like you said, 4.3 mV when charged but still plugged in.Which is why you should avoid charging over night.

Voltage status may differ between apps, for example cpu-z shows around 3.4 mV for me when it's 10%
25th April 2015, 01:40 PM |#10  
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isn't it the other way around?
Android system gives a Voltage value read from the battery and is calculating the % Battery remaining from this?
So they % You have is depending on the ROM you're using but the Voltage reading of the battery will always be the same?
25th April 2015, 07:22 PM |#11  
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Android system reads both the voltage and percentage seperately.This is one of the reasons why battery calibrations is required at times.If you haven't calibrated your battery for half a year or so, it may show 100% at 4.0 mV or something lower compared to 100% at 4.2 mV ~ which would give you less of your battery.

Voltage reading is not exact mostly, rather approximate.But yes, it is more reliable than percentage and shouldn't differ between ROMs.
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