Technology and Industry Trend: Huawei Launch Top Ten Trends of Site Power - Huawei Developers

What will happen if the energy technologies are combined with the power electronics technologies and digital technologies? What does it mean to the site power?
To answer these questions, Peng Jianhua, President of Huawei Site Power Facility Domain, together with industry guests, discussed the technology and industry trends and predicted the ten trends in the site power domain. The ten trends are released to provide clues of development directions and innovation for the industry and help build a better future.
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Trend 1: Power Digitalization
The full power link from power generation, conversion, storage, to use will be digitalized. The entire energy network will change from the traditional watt flow to watt+bit collaboration, driving the digital transformation of site power from points, chains, and networks with the concept of Bit Manage Watt. The convergence of digital technologies and energy technologies will make energy networks visible, manageable, controllable, and optimizable.
To this end, Huawei explores a three-layer energy target network from the components, site, to network to help customers build a simple, intelligent, green, and reliable energy target network and meet the new energy development requirements in the future.
Trend 2: "Zero-Carbon" Network
Green and sustainable development is a global campaign. Clean energy application and energy saving have become the mainstream around the world. In the future, the full link of power generation, load consumption, and power conversion and storage will be green, efficient, and energy-saving. From the top-level network planning and design, construction and capacity expansion, to the reconstruction and optimization, digital O&M and energy efficiency management, and zero-carbon evaluation, a zero-carbon network will be realized through the integration of power electronics, digital, and AI technologies. The rapid development of core technologies, high-efficiency technologies, and digital technologies also makes zero-carbon networks possible. Energy-related OPEX for carrier networks will not increase after adding 5G, greatly reducing CAPEX. Carbon emissions of networks will be cleared through simplified network construction, intelligent O&M, and full-lifecycle management of energy networks.
In Green Island, Greece, Huawei helps a carrier reduce carbon emissions by 10 tons per site per year by intelligent solar access. In Pakistan, Huawei uses an advanced hybrid power supply to replace diesel generators, reducing carbon emissions by 18 tons per site per year.
Trend 3: Lithium for All
Thanks to its long lifespan and continuous technology development, lithium batteries gradually replace lead-acid batteries in the large-scale applications in various industries around the world. Batteries that solely serve as emergency backup power can no longer meet diversified requirements in various scenarios. They are hoped to become a comprehensive energy supply. Common lithium batteries provide only a single function. After the power electronics and digital technologies are combined, the local BMS and cloud BMS will collaborate with each other. With the help of AI and big data technologies, common lithium batteries will become intelligent and cloud-based. From a single component to a cloud-based smart energy storage system, lithium batteries will be safer, applicable to more scenarios, and with more efficient O&M, maximizing the value of site energy storage.
Following the intelligent lithium battery, Huawei launched the fifth-generation CloudLi solution, which redefines the architecture of lithium batteries in the new era. The solution features a full-scenario connection, simplified cloud maintenance, AI-based integrated energy storage, precise configuration, and proactive security management. This solution will surely bring more benefits to customers.
Trend 4: Telecom Site to Social Site
5G has entered different industries. As a result, a large number of digital sites are emerging. Varied scenarios require more flexible and diversified sites. Traditional sites with the single function of communication connection will evolve to social sites with comprehensive functions, maximizing the site value.
In Northern Africa, Huawei launched the innovative eMIMO solution, a unified energy platform that supports multiple inputs and output modes. This solution helps traditional site infrastructure with a single function transform to one with comprehensive energy services. Site power facilities also supply power to small-scale retail stores and police stations in villages.
Trend 5: Energy Supply Diversification
The diversification of energy supply is embodied in three aspects: First, the diversification of power supply sources. New energy, especially solar energy, will gradually shift from supplementary to the primary. In addition, more power supply solutions with optimal configurations will be available thanks to the combination of new energy with mains and energy storage systems. The second, the diversification of application scenarios. Site power is no longer just the power source of IT or CT equipment. Instead, it changes to ICT converged power supply and begins to power people's livelihood and production. Third, the diversification of deployment modes. In the future, site power can be deployed in multiple modes. For example, centralized solar power plant, campus power supply and small-sized micro-grid power supply, distributed power supply and hybrid power supply, and household PV power supply. Power facility deployment will change from centralized to centralized+distributed mode to meet different application requirements.
In Ethiopia, Huawei used the advanced solar energy, energy storage, and diesel generator hybrid solution to save 12.26 million liters of fuel for communications sites, saving US$20,000 in fuel costs and reducing carbon emissions by 26.2 tons. In Nigeria, distributed off-grid micro power plants were used to reduce the cost per kWh from US$0.5 to US$0.2. The power system provides a stable power supply for the local area around the clock.
Trend 6: Full Link Intelligence
With the gradual digital transformation of the energy industry, the traditionally siloed architecture and isolated management of energy subsystems will evolve towards integrated smart energy. The software-defined subsystems for power generation, conversion, storage, distribution, consumption, and temperature control will use AI algorithms to achieve full-link collaboration and optimal power supply systems.
In Zhejiang province of China, Huawei cooperates with China Tower to reduce the site power consumption by 17.1% through the AI-based peak staggering function, helping the customer reduce the electricity fee by CNY1788 per site per year.
Trend 7: Simple and Convergent
As a large number of sites will be deployed, IT and CT services are further integrated at one site and the power supply and battery will be combined. The AC and DC power modes are integrated in one power supply. Therefore, multiple power systems will become one. Sites will evolve from equipment rooms to cabinets and poles, reducing the footprint and power consumption. The site power efficiency will be further improved and the electricity fee will also decrease, achieving low carbon emission throughout the entire network and realizing a simplified power supply during the lifecycle.
In Mexico, Huawei launched the iSuperSite solution, which supports ultra-high-density and large-capacity power supply and equipment housing. This solution uses cabinets to replace rooms and integrates IT and CT power supplies into one to reduce site deployment costs and shorten the deployment period. It can reduce power consumption and save rents, achieving optimal TCO.
Trend 8: Multi-mode Architecture
With the diversification of energy supply and equipment types, site power will develop towards a multi-mode coordinated architecture. The system architecture will support multiple energy input and output modes, multi-mode scheduling control, and management. The system will evolve by modular overlay. One power supply system applies to multiple scenarios and realizes converged power supply for different services and devices.
With Huawei's innovative and unified eMIMO power supply architecture, one power supply system (platform) supports multiple input and output modes, meeting the power requirements of different equipment in various industries such as communications, transportation, and electric power.
Trend 9: Autonomous Driving
Autonomous driving is the development theme of site power in the future. First, the application of AI technologies will simplify energy O&M, implement remote O&M, self-learning, and automatic O&M, and improve O&M quality and efficiency. Second, the intelligent IoT connection technologies and intelligent sensing technologies will enable digital management of site power. The original management of dumb devices will be eliminated. With digital sensors and the intelligent management platform, all components and devices in the energy network can be sensed and interconnected.
In Zhejiang Province, Huawei uses the AI-powered intelligent load power-off slicing technology to ensure power supply to important services and ensure zero site breakdown during the epidemic. During the epidemic, the remote battery inspection function of Huawei intelligent sites reduces manual site visits. The battery test precision is also improved, reducing the site visit cost by US$200/year for a single site.
Trend 10: Safe and Reliable
The surge of data volumes spurs the network, digital, and intelligent transformation in the energy industry. Therefore, the reliability, security, privacy, and resilience of hardware and software become necessary requirements.
Huawei's power products feature high security and reliability design of software and hardware. In addition to high-reliability design and manufacturing, predictive maintenance is supported at the hardware side to consolidate the reliable foundation. In terms of software, layered control and defense functions are added to the software, making the energy industry more safe and reliable.

Related

Whole truth about gluttonous tg01 :)

Hi.
If You do not like electricty, all this ampers and volts just do not read it and do not write like some people used to do writing "I do not understand, I am not interested in.".
Having enough all this disputes "this rom eats more, this eats less, it does not depend on rom" and so on, I decided simply to measure it. Maybe it makes us to be closer to answer.
Base of my test is original Malezya rom. Normally it has old version of SPB Shell ( 3.01 as I remember ). Currently I applied to it mirolg "WM start disable xxxx" cab to have more ram and disabled new fashion lock screen ( now I have old fashion WM6.1 lock ). Some additional software I installed on it like Palringo, Total Commander, GoogleMaps and some others ).
Initial voltage of my battery was 3,75V ( 50% as tg01 says ).
I was not able to measure absolute peak current but "average peak" current in different situations and I can share it with You.
My backlight is set relatively low. Tg01 has very brigt screen so backlight does not have to be very high. In my measurements backlight current was about 50mA.
And now some result from starting boot to SPB shell screen.
If I say x - y mA it means average current fluctuates.
1) Tg01 on. Toshiba logo on screen - 300-350mA
2) Windows welcome screen - 300-350mA
3) Phone keyboard to put PIN ( I have set it ) - 220-250mA
4) Now SPH shell appears and current is still as previous going down after about 30 seconds to 100-120mA
5) This 100-120mA it is normal current when SPB shell is displayed and we do nothing on the screen
6) When backlight is off current goes to 50mA
7) When tg01 go to sleep , sleep current strongly changes . It is not very small and stable as maybe many people think. I was still watching enough frequent average peaks to about 13mA. No wonder thet even after few days of doing nothing and only sleeping out battery will be "dead". There is one "but". If one switch off radio then one can get stable, much less current in sleep mode. Typically 2.1mA. There are some peaks but very rare and not so big when radio was ON ( 13mA ) - here 4mA.
Conclusion - I You want to have sleep mode and do not want recieve any calls and smss , simply switch off the radio. Worthy.
8) Let's come back to operational mode. When we do any simple operation on SPB shell , for example we click on clock, current goes even to 300-350mA for short while. Generally, ony graphic operation takes a lot of current.
9) Work with internet.
Connection to internet via GPRS ( HDSPA ) takes even 500mA. Typically 300-350mA. After connection is established there is still enough big current ( 300mA ) for about 20-30 seconds. Why, I do not know. After this time current goes to about 200mA and is stable ( Palringo ) and sometimes is able to go to "operational" current ( 100-120mA ) for Internet Explorer. After www page loading there are current peaks to 300-350mA maybe concerned with GPRS connection itself ? Who knows.
And at last my favourite software Garmin Mobile XT. After execution current is about 200mA. When routing , little bit more 220mA with peak current from time to time to 260mA.
I did not test current during talk
Summing up. If some people say that they were able to do many hours of different operations with tg01 then either they are kidding or maybe there are some ROMs or rather maybe some combination of ROM setting which allows to do it.
Above measurements says " it is impossible" in my coditions.
Maybe I will try to revert some setup on this Malezya rom including WM menu enabling and removing SPB shell so that to have original ROM and check it again.
If someone wants me to test on my rom any situation not described above ( but without wasting my money for calling ) I will do it. My tg01 is still opened and with a lot of cables until monday I suppose but I do not promise.
Regards
fxdjacentyfxd
Additionally I checked current during file transfer from internet. Average current was relatively stable at about 450mA. Hmm, eats like a hell .
With battery voltage 3,9V it is almost 2W of power !
Taking into account previous measurements and this above I think to myself that generally radio is main factor that decide how long tg01 battery will live. It has of course connection with how close we are towards GSM base station and quality of the signal.
Colegues ( I mean thouse who have spectacular long battery life ), what radio version You used to work with and do You know how close You are ( were ) to base station during tests ?
Regards
fxdjacentyfxd
For my electronic training, I strongly appreciate your scientific approach to the polemic matter of battery drain!
Miracles in electronics doesn't exist, and the fact is that our battery is ridiculous to feed a TFT 4,1" (800x480) screen. Add the fact that GPRS and GSM radiates a lot of energy (specially if your are in an area with bad reception, the fact that graphic and/or mathematics applications request a lot of power and the normal is going back home after a day of average use with less that a 30% of battery.
When your device is hot in your pocket or in your ear, you don't need to be a technician to understand that this temperature increasing in your CPU means a high current flow that runs out your battery!!
It would be interesting compare with other device with snapdragon like HCT HD2 using THE SAME apps, using your same procedure.
Some tricks can help a bit, specially if we can avoid some hidden process as menu or similar.
Could you show an scheme of how did you do it? Perhaps someone can use the same system to compare apps, roms, or other devices!.
Thanks again
Pere said:
For my electronic training, I strongly appreciate your scientific approach to the polemic matter of battery drain!
Miracles in electronics doesn't exist, and the fact is that our battery is ridiculous to feed a TFT 4,1" (800x480) screen. Add the fact that GPRS and GSM radiates a lot of energy (specially if your are in an area with bad reception, the fact that graphic and/or mathematics applications request a lot of power and the normal is going back home after a day of average use with less that a 30% of battery.
When your device is hot in your pocket or in your ear, you don't need to be a technician to understand that this temperature increasing in your CPU means a high current flow that runs out your battery!!
It would be interesting compare with other device with snapdragon like HCT HD2 using THE SAME apps, using your same procedure.
Some tricks can help a bit, specially if we can avoid some hidden process as menu or similar.
Could you show an scheme of how did you do it? Perhaps someone can use the same system to compare apps, roms, or other devices!.
Thanks again
Click to expand...
Click to collapse
Hi guys i have a question for you all..
How does having a bigger screen consume more power than a smaller screen? Even if both devices have the same number of pixels to illuminate, how does the bigger screen use more power? Sorry if i am asking a silly question...
Pere said:
It would be interesting compare with other device with snapdragon like HCT HD2 using THE SAME apps, using your same procedure.
Some tricks can help a bit, specially if we can avoid some hidden process as menu or similar.
Could you show an scheme of how did you do it? Perhaps someone can use the same system to compare apps, roms, or other devices!.
Thanks again
Click to expand...
Click to collapse
Hi Pere.
Test procedure was as simple as possible but am afraid nobody will repeat it unless You will find some electronic hobbyst like me .
As You remember my works with tg01 with XL Mugen cover, before I got second battery , I utilized naked li-pol battery capacity of 1000mAh and glue it where original battery exists. It was connected to second 2600mA battery but never mind. During this tests I have 1000mAh battery alone. Having it I was able to apply mesurements resistor 0.1Ohm in serial connection with battery and tg01. This resistor value seems to be appropriate to avoid too big voltage drops on it and the method allows us to avoid long cables to amper meter what could cause bigger voltage drops and even any kind of electric noise ( disruptions - hmm I do not know whether it is correct english translation ). As a matter of fact we measure milivolts on measurement resistor not current directly.
Writing "average peaks: or "average current" I was simply watching on milivoltmeter. Rule is simple with this resistor : mA = mV * 10
I realize to get accurate values we need any device that can count average current in certain period of time. Then we get really issued energy but in our case we simply do not need it. We rather need know what is current during certain operations and I showed it.
I tested 2 roms so far. My malezya and ffboy 6.1 which was my first cooked and in my oppinion one of the best as far as speed and stability is concerned. During test it has other radio ( 1600 ) than malezya ROM ( it has 1800 ).
Hmmm, turned out ffboy eats even more then malezya. I mean transient states when we connect via GPRS to network.
Anyway IE is able to draw even 450mA after connection for several seconds untill it reduce it to about 220mA. If we hide it we get about 100mA current which is as I said previously "operational" current of tg01 with given backlight level ( about 50mA alone without backlight. This value we can assume as a tg01 idle current value ).
Regards
fxdjacentyfxd
Having at last wi-fi access at home I measured current during connection process and during internet download.
Swiching wi-fi causes average current flows at abou 160mA but strongly vary from 130 to 200mA ( I would like to remind that operational current is 100mA ). After connection is established current almost immediately goes to "operational state" as though wi-fi was off . From time to time one can see light current peaks above 20mA over operational state.
IE - connection to any www site causes current peaks to 200mA. After that current goes down to 160mA or 130mA which depends on www one is watching. At last it goes to operational state.
File downloading - average current at about 210-230mA.
Conclusion ? If one can have opportunity, one should definitely use wi-fi not GSM to internet connections. Much better.
Regards
fxdjacentyfxd
olyloh6696 said:
Hi guys i have a question for you all..
How does having a bigger screen consume more power than a smaller screen? Even if both devices have the same number of pixels to illuminate, how does the bigger screen use more power? Sorry if i am asking a silly question...
Click to expand...
Click to collapse
The main problem is the backlight power consumption .
You can understand it with this example from the catalogue of a real TFT supplier:
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I hope this help you understand why bigger is better but....
Best Regards

[Info]Everything you need to know about Li-ion Battries

Since i see a lot of ranting going over the battery life again, i thought it would be appropriate to share this.
So after noticing how much of a difference people get in their battery lives, I've decided to do some research and make a guide-line that will give us all we need to know about properly using our batteries. First part is a general information and usage techniques for LIBs, second part is taken from Google materials on Android-powered devices (G1, Magic, Droid, Nexus One, etc).
Sources:
Wikipedia - http://en.wikipedia.org/wiki/Lithium-ion_battery
BatteryUniversity - http://www.batteryuniversity.com/parttwo-34.htm
Google IO Conference 2009 - http://www.youtube.com/watch?v=OUemfrKe65c
Electropaedia - http://www.mpoweruk.com/life.htm
General Lithium-Ion Battery (LIB) Usage:
• Discharging your LIB fully (or less than 2.4 Volt per cell) is bad for the battery. Every time you do that, it can be said that small part of your battery (some cells) dies (they forever lose their charge). Do not store your batteries depleted, there's a high chance they will die completely or will become very "weak".
• You cannot restore bad LIBs by overloading/heating/praying. You gotta go buy a new one. They DO degrade overtime, some cells naturally lose the ability to gain/give electricity.
• Although it is said that LIBs do not have memory, it's not entirely true. LIBs have gauges that monitor performance of cells, and if you do a lot of small charges, it won't let those gauges to monitor a full battery potential, causing an invalid indication of charge level. A complete charge/discharge should be made when battery capacity seems reduced, that will calibrate gauges and they will provide your phone with correct charge level status. A full charge/discharge cycle should be done every 30 (or so) partial charges.
• LIBs have a shelf-life. Do not buy them to store them. Use them early, use them often, they will die whether you use them or not. Do not buy LIBs to use them in 6 months/year/etc, buy them right before actually using them.
• LIBs have short lives (in comparison to NiCa batteries, etc). You should expect to buy a new battery in 2-3 years after being manufactured. It is caused by internal oxidation and there's nothing you can do to stop or prevent that.
• Worst LIB treatment is to keep it at 100% charge level at high temperature (think laptop/phone under direct sunlight, like car dashboard).
• Best LIB treatment, or LIBs "favorite" charge level - 40%. That's also the usual charge level you buy them with.
• LIBs don't like heat. For example, while always at 100%, typical LIB in a laptop, at temperatures of 25C (77F) will lose 20% (twenty percent!) of full capacity per year. That capacity loss is reduced to 6% (six percent) at 0C (32F), and increased to 35% loss at 40C (104F). So, keep them cool (LIBs like fridges), don't let your devices sit in the sun or overheat at charge. Also, keep in mind that while in use, battery will be significantly hotter than phone/outside environment
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• LIBs like frequent partial charges/discharges more than they like full charges/discharges.
General Android power usage advice from google:
• Although this part is somewhat controversial, they do recommend having a complete, full FIRST charge to be made. If time allows, a preferred time for the first charge is 12 hours. This may have more to do with the OS than the battery.
• Battery on a Android device, in average, will last about a full day with normal use (some videos, mail, calls). That's what you should kind-of expect.
• Speaking in averages, "idling" 3G/EDGE connection (when phone is sleeping and no data is transferred through 3G), drains almost no energy. Just a little more than having 3G/EDGE radio off completely. So when no apps are using 3G, you don't need to keep it off.
• Same goes to WiFi connection - although it's on, if there is no data flowing through it, it uses almost no energy.
• At full throughput (100% data flow), EDGE is using more energy than 3G. In average, 3G is more energy-efficient than EDGE.
• WiFi is using more energy than 3G (when both are at 100% use), but since it transfers files much faster and then goes to "sleep", it's actually recommended to use WiFi whenever possible. Since it'll "sleep" more often than 3G, overall it will use much less battery than using 3G.
• Some bad apps or widgets can use android's "WakeLock", keeping CPU at 100%, screen always-on, or both. I myself have encountered such widget (I won't mention the name, it's in the market) that used a WakeLock to keep CPU spun-up at 100% all the time. That makes a huge impact on battery life. My advice - use a CPU profiling app to monitor the CPU - make sure that CPU slows down by itself when it's not used. So, beware of such widgets/apps. To check for CPU cycles, many recommend OSMonitor (free from market, install it, go to options, sort by "Load" in descending order. It'll give you "busiest" processes at the top). At rest you should be getting about 10-20% for OSMonitor itself, and 1-10% Android System. At rest, everything else should be 0-1%.
• Android slows down CPU when not in use by itself, as a built-in feature. Apps that throttle/change CPU frequency, are not necessarily needed.
All this info comes from those reputable resources I mentioned above, I didn't make any of it up.
Note : I am just sharing this. All credits go this post.
Some points about LIB contradict the other points. Very wierd.
There's a lot of things that contradict each other. How does Edge take more battery than 3G? That makes absolutely no sense. With 3G I get minimum 7-8h and on Edge 12hrs+ depending on usage.
SuperAce609 said:
There's a lot of things that contradict each other. How does Edge take more battery than 3G? That makes absolutely no sense. With 3G I get minimum 7-8h and on Edge 12hrs+ depending on usage.
Click to expand...
Click to collapse
To be simple :
1. Therotically : Edge is slow in data transfer. So it requires the connection to be on for a larger amount of time as compared to 3g. While 3g completes the data transfer in a smaller time period. So 3g takes less battery as compared to edge.
2. Practically : If the 3g signal is weak, then the phone constantly tries to search for a better 3g tower, thus using more battery. While as the edge connection in most countries is stable (lot of radio towers).
So practically speaking, edge takes less battery than 3g.
Understood?
Don't be a noob. Be a newbie..!!
Details here.
It's not dangerous if we keep charging overnight at room temperature (Here in Indonesia, 25C is an average temperature at night, and 30ish at days) because the phone will stop charging after it reaches 100%
Sent from my GT-S5830 using Tapatalk 2

[TEST] Does your phone charge slower when your battery is nearly full?

Does it seem like your phone charges very quickly until the battery gets close to full and then charging slows down dramatically? To answer this question, we decided to run a test to see how fast phones charge at different battery levels. For this test, we’re going to use a new tool called Battery Mentor for real-time measurements of the charging speed.
For more details about Battery Mentor, please see here:
http://forum.xda-developers.com/android/apps-games/app-battery-mentor-t3498470
Test Procedure:
Set the screen brightness to the max setting for consistent results across different battery levels and devices
Close all apps running in the background
Charge or let the battery drain to the desired level
Launch Battery Mentor
Connect the charger
Wait for 30 seconds or until the charging power stabilizes
Make a note of the power value
Repeat steps 1-7 for various battery levels
Devices:
We ran the test on several devices to see if the behavior varies from device to device:
Nexus 6 (2014, November)(Android 7.0) - Li-Po 3220 mAh battery
Nexus 5 (2013, October)(Android 6.0.1) - Li-Po 2300 mAh battery
Nexus 7 (2013, July)(Android 4.4.2)- Li-Ion 4325 mAh battery
Results:
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Observations and Discussion:
In the 1-80% range, the charging power remains consistent across all devices.
The charging power varies across different devices. This is most likely due to battery technology as the newest device had the fastest charging speeds (Nexus 6 - 2014, November) and the oldest device had the slowest charging speeds (Nexus 7 – 2013, July).
The charging power drops off dramatically in the 80-100% range for the Nexus 6. This can be attributed to a technique called Trickle Charging, which reduces the charging current to extend the battery lifespan. It’s interesting to note that the neither the Nexus 5 nor the Nexus 7 exhibited this technique.
Conclusions:
Some devices do slow down charging dramatically the when the battery starts getting close to full. This can be explained by a technique called Trickle Charging, which reduces the charging current once the battery level reaches 80% to extend the lifespan of the battery.
The above observation is important when you try different charging cables with Battery Mentor or another charging app. Please check to make sure your battery level is at 80% or less when evaluating a charger.
Does your battery on your device behave the same way or differently? Would you like us to run more tests like this in the future? Let us know in the comments!
BatteryMentor said:
Does it seem like your phone charges very quickly until the battery gets close to full and then charging slows down dramatically? To answer this question, we decided to run a test to see how fast phones charge at different battery levels. For this test, weâ??re going to use a new tool called Battery Mentor for real-time measurements of the charging speed.
For more details about Battery Mentor, please see here:
http://forum.xda-developers.com/android/apps-games/app-battery-mentor-t3498470
Test Procedure:
Set the screen brightness to the max setting for consistent results across different battery levels and devices
Close all apps running in the background
Charge or let the battery drain to the desired level
Launch Battery Mentor
Connect the charger
Wait for 30 seconds or until the charging power stabilizes
Make a note of the power value
Repeat steps 1-7 for various battery levels
Devices:
We ran the test on several devices to see if the behavior varies from device to device:
Nexus 6 (2014, November)(Android 7.0) - Li-Po 3220 mAh battery
Nexus 7 (2013, July)(Android 4.4.2)- Li-Ion 4325 mAh battery
Results:
Observations and Discussion:
In the 1-80% range, the charging power remains consistent across all devices.
The charging power drops off dramatically in the 80-100% range for the Nexus 6. This can be attributed to a technique called Trickle Charging, which reduces the charging current to extend the battery lifespan. Itâ??s interesting to note that the neither the Nexus 5 nor the Nexus 7 exhibited this technique.
Conclusions:
Some devices do slow down charging dramatically the when the battery starts getting close to full. This can be explained by a technique called Trickle Charging, which reduces the charging current once the battery level reaches 80% to extend the lifespan of the battery.
The above observation is important when you try different charging cables with Battery Mentor or another charging app. Please check to make sure your battery level is at 80% or less when evaluating a charger.
Does your battery on your device behave the same way or differently? Would you like us to run more tests like this in the future? Let us know in the comments!
Click to expand...
Click to collapse
Uhhh... Guys...
All batteries do that... From the simple Ni-Cad all the way to the more complex li-ion...
Whether it has the circuitry for quick charge or not...
rignfool said:
Uhhh... Guys...
All batteries do that... From the simple Ni-Cad all the way to the more complex li-ion...
Whether it has the circuitry for quick charge or not...
Click to expand...
Click to collapse
Agreed - this behavior is due to an unrelated feature called Trickle Charging. This feature reduces the charging current to extend the battery lifespan and isn't limited to devices that have the circuitry for quick charge (as you mentioned, it's not even limited to batteries in mobile devices). We just want to make sure that people understand this feature and why it's important to have the battery level at 80% or less when evaluating chargers.
This feature also appears to be a bit more complex in terms of when it actually affects the charging rate. In our test, the charging power for the Nexus 5 and Nexus 7 did not go down when the battery level reached 80%. We suspect this is either because the Nexus 5 and Nexus 7 circuitry doesn't have the trickle charging technology or because the charging speed (~4W for the Nexus 5 and ~3W Nexus 7) is below a certain threshold, so charging speed is unaffected when the battery level reaches 80%. That's just a hypothesis though - if there's a better explanation, we'd love to hear it!

Battery Life no better than S20?

The few "real world" reviews that are popping up show very little battery life differences between the S21 and S20 in web surfing which is similar activity to what I perform.
Surprised given the 5nm S888 and efficiency improvements with the 5G modem. Also has same size battery.
Are people hearing different?
Chris
You are correct. Likely a combination of (1) S888 design is not very power efficient and (2) samsung 5nm euv < tsmc.
The power savings from the variable refresh rate screen, integrated 5g modem and 4gb ram reduction appear to be just *barely* enough to make up for the inefficiency of the s888.
See https://forum.xda-developers.com/t/poor-s888-implementation-ruins-s21.4222807/

Themes / Apps / Mods [root] DOUBLE your battery life (also Less heat)

Hi, if you can enjoy putting this on your phone you Will be glad to have freely more autonomy on your phone, also, less heat that you will see in the same moment that you apply it, and, what is better, you will be able to have a lot more battery Avoiding being dependent of the charging and you can use your very well "heat efficient" phone with their polymer case which made a "sandwich" having it the cpu backed every time that a girl text you on tinder or stuff or, you put on a game to play.
What it does :
- Tweaks the Cpu to have less heat as well as more performance, enables You to choose what's better for you, in four options.
WHY I need this:
Apple have their iphone with 6 cores instead of 8. Their cores are: "two cortex X2 rebranded" and four low energy cores. And, they use only one program (iOS) and above them they run "complements" of the program, called "apps". Based on this, you can have FOUR different browsers on your iOS device that are essentially the same (WebKit) with a skin and some functionality. Avoiding you to have options. Likely better than that. So, you don't need power. Because you are not using it. Since everything runs fast because it's pre-loaded with this iOS, android developers paid by companies put a lot of cpu and Gpu power on your android phone to OVERPOWER that iOS devices. And that, comes at cost of battery.
So, in order to have the same functionality as before, and the same power level of apple, when you cut down the power of s processor you will have the same app opening/closing speed of apps as well as functions but, with a lot of more battery. Maybe you see one of tho "stutters" but that aren't granted, and you will have less heat also.
So, this module created by @yc9959 works very well letting you choose from four options to fine tweak your cpu. Install should be through magisk.
【Preset Performance Mode】
Caton powersave: Large performance limit, suitable for users who do not require high fluency
Balanced balance: Moderate performance limit, suitable for daily mobile phone
Power consumption performance: approximately equal to no performance limit, suitable for tablet daily life
Extremely fast: similar to the cost of electricity, with continuous performance output, suitable for mobile gaming
【Sub-module description】
SfAnalysis: Recommended, reduces dropped frames at the cost of lower power consumption
SsAnalysis: optional, try it if you experience dropped frames in desktop animations
GitHub Link to download:
Releases · yc9559/uperf
Userspace performance controller for android. Contribute to yc9559/uperf development by creating an account on GitHub.
github.com
Instructions: [1] Open BL
[2] Install Module
[3] Enjoy.
Greetings to the Devs.
Does anyone try it?
Waiting for feedback before I try
I downloaded and installed it but the presets commands are not well explained, I'm trying to understand
fpsRevoltz said:
I downloaded and installed it but the presets commands are not well explained, I'm trying to understand
Click to expand...
Click to collapse
I come back here to say that I found it, I had to open the .json to find it, since the creator doesn't say..
The presets are:
Balance
Powersave
Performance
Fast
You can change the values too, inside .json
anyone used this? does it really work?

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