Develop Bugs

[Q] Is it possible to create a "bump charging" kernel?

http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
First of all, bump charging is not good for your battery, but considering you can buy one from ebay at the same cost as a hamburger combo meal, I think I am willing to skip a lunch to replace my battery every year.
One technique that has gained popularity in the user community is “bump charging.” To bump charge a device, turn it off completely, and plug it into a charger. Wait until the indicator light shows a full charge (on the ADR6300, for example, the charging LED changes from amber to green) but do not yet turn the device back on. Instead, disconnect and immediately reconnect the power cord. The device will now accept more charge before saying it is full. This disconnect/reconnect process can be repeated multiple times, each time squeezing just a little bit more into the battery. Does it work?
The following chart plots battery depletion after the device has received a hefty bump charge (6 cycles) and then turned on to use battery power. Note that the system does not show the battery dropping from 100% until well over an hour of unplugged use, at which point it starts to steadily decline. Again, however, it should be obvious that the battery gauge is not syncing up with reality. How could the rate of depletion be increasing over the first 5 hours while the rate of current draw is relatively steady? And why does the projected battery line separate from the reported levels, but then exactly mirror the later rises and falls?
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The answer, of course, is that bump charging definitely works. Rather than anchoring our projected values to the first data point of 100%, what happens if we anchor against a later point in the plot?
Aligning the data suggests that a heavy bump charge increases initial capacity by approximately 15%. Note that the only other time that the lines separate in this graph was once again when the phone was put on the charger and topped up to 100%. Just as with the first set of graphs, the phone kept reporting 100% until it was unplugged, dropped rapidly, and again caught up with our projections.
So what does it all mean?
If you absolutely need the highest capacity on a device like this, you will need to bump charge. There are currently people experimenting with “fixes” for this, but I have yet to see one that works. Be warned, however, that repeated bump charging will wear your battery faster and begin to reduce its capacity. If you are a “power user” who will buy a new battery a few months from now anyway, this presumably isn’t a concern.
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Check out the second post, v8-beta.
http://forum.xda-developers.com/showthread.php?t=876590

_MetalHead_ said:
Check out the second post, v8-beta.
http://forum.xda-developers.com/showthread.php?t=876590
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Sweet!!! I will be testing that kernel this weekend! HNY!

Neo3D said:
Sweet!!! I will be testing that kernel this weekend! HNY!
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How has this been working? I was using a V7 Kernel from that site that used TRICKLE charging.. NOW I read about the bad effects of trickle charge and batteries so I decided to try BUMP CHARGE since it doesnt leave voltage on the batery all the time. I jut know know the effects of bump over trickle and if one is better/safer then the other..

any update?

Slow charge problem

Hello, I have the problem that no matter which charger / charge cable ,the phone takes at least 3 hours to charge 0% -> 100%, the battery once charged gives me life 3-4hs sot (screen on time). Thanks
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Sounds like your battery is bad. If you have the phone/battery for about a year or less, it's possible the battery is defective. If you have another battery use that one, but if you have a new battery you will need to cycle charge the battery. This means you have to charge from 0 to 100, let it deplete completely and keep doing the same thing for about 3-6 charges. This effectively breaks in a battery giving you the best longevity.

tonys.94 said:
Sounds like your battery is bad. If you have the phone/battery for about a year or less, it's possible the battery is defective. If you have another battery use that one, but if you have a new battery you will need to cycle charge the battery. This means you have to charge from 0 to 100, let it deplete completely and keep doing the same thing for about 3-6 charges. This effectively breaks in a battery giving you the best longevity.
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thanks tonys, i will try it

Shu7Down said:
thanks tonys, i will try it
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sorry to revive this thread but did a new battery work for you? I'm experiencing similar problems since the MM update, without fast charging enabled it charges at about 600mah, with fast charging enabled its about 1000mah but tapers off to 400mah once it gets to 85%
I'm not sure if its my battery or if this is a new "feature" of MM, last time that i charged from 30% it took 4 hours to reach 100% if anyone got a suggestion let me know.

3-4 hours is great compared to mine. If I use the USB cable, it'll take about 12+ hours (0-100%). Problem started after I dropped the phone. Luckily wireless charging takes about 5 hours.

Used to be no more than 2 hours before, not sure what the problem is, the battery is only a year old

Phone just stopped fast charging?

3-4 days ago, it just happened out of the blue. Charging from 70% to 100% took 1.5 hours. I rebooted. Didn't do anything unusual in that time but updated Play Store apps. Just tested it right now - 22% in 43 minutes.
Any ideas on how to fix?
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So, what exactly is the problem?

amirage said:
So, what exactly is the problem?
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The charging appears to be much slower than it used to be.
I just checked at 45% battery. It says "Charging rapidly," but it is charging at a speed significantly lower than 1% per minute, more like 0.8% per minute. It completely stops "charging rapidly" at higher % of battery. In my estimation, this will charge the phone, 0-100, in about 2h35m. It used to be 1h40m.
I think that either the latest update introduced a bug or my charger/cable/phone usb socket broke.

Usually rapid charging occurs at a lower % and then goes away as the phone reaches a certain threshold. I think if you charge the device at 75% battery level, rapid charging may not happen...I could be wrong though...If this is a bug, then it would be all over Reddit which it's not...so it's very likely that your charger is kaput!

I've had the same issue, although not really looked into why yet.
I was using a charger I had with my 6P because it had a longer cable(official, bought from Google when I had the 6p).
I changed the cable to the plug that came with my XL, and it started fast charging, in fact faster than I have had in months it feels like.
I think they changed something in the latest May security/bug release, i'll be investigating more on my day off from work.

amirage said:
Usually rapid charging occurs at a lower % and then goes away as the phone reaches a certain threshold. I think if you charge the device at 75% battery level, rapid charging may not happen...I could be wrong though...If this is a bug, then it would be all over Reddit which it's not...so it's very likely that your charger is kaput!
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It should be all over Reddit, except I don't use Reddit, therefore it is not
Anyway, the Charging Rapidly does stop after 70%, however, Google algorithm still predicts 1% per minute charging rate. For example, it may say "Charging" (not Charging Rapidly) at 75% and then say in parenthesis - time to full charge 26 minutes (literally happened to me.) It still took well over 45 minutes to charge from that state.
I think there are bugs and issues with the new OS updates with regard to charging.

Battery

Can I set my mobile to stop charging after a certain percentage?

I don't think so, only scenario I have seen regarding this, is when rooting, max charge level of 80%, but I know of this when I used a note 8

Could I ask why ?
Sent from my SM-N976B using Tapatalk

baylakedrive said:
Could I ask why ?
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They say your battery life decreases when you charge it fully. I got this off a site: Your phone's battery loses capacity every time you keep it fully charged all night, every night. About 20% loss per year!

My Tab S6 has even a setting to restrict charging to 85%.
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uhi711 said:
My Tab S6 has even a setting to restrict charging to 85%.
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Don't think my Note 10+ has that function:crying:

I also have the Note 10+ and I can confirm that, unfortunately, it does not have the setting to restrict charging to a certain percent.
You could use Bixby Routines to get a remainder (sound or message notification) when charging gets to a certain percentage.
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J48BLE said:
Can I set my mobile to stop charging after a certain percentage?
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That's a negative unless rooted.
Accubattery let's set an alarm that sounds even with the screen off (which it should be when charging).
Heat and voltage potential kill Li's. The higher the charge and cell temperature, the more damage.
•Li's love short partial charges midrange between 40-70% ie from say 45 to 65%. Partial midrange charging causes almost no wear.
•Avoid charging to 100%; best to stay below 80%.
•Avoid discharging below 30% or if you do only do a partial charge of 20-30%.
As you get nearer to the 6% limit the battery needs to provide more current to meet the fixed mobo V+/milliamp requirements thus more battery stress and heat buildup. Voltage converters need to work harder as well to step up the voltage for the mobo which also produces slightly more heat.
•Avoid letting the battery charge hot (above 99F).
○Avoid charging batteries below 80F and never charge if below freezing without warning phone first as it can cause Li plating which permanently degrades the cell.
Keep phone out of the sun; don't bake it.
•Don't allow a misconfigured apk(s) to constantly run it warm. Excessive current draw increases Li battery wear. An idling 10+ should be relatively cool to the touch.
Find the current drain(s) and correct.
•Fast charging is fine if you remember to not allow deep discharges.
•After about 80-90% to charge rate goes from 2%@min to 1%@min. 62-70% is an ideal charge stopping point for maximum battery lifespan.
○Never store an Li with less than 6%; charge when possible. Li's self discharge at a 2-3 rate per month.
They auto shutdown at 6%; if the voltage falls too low their protection circuitry will permanently disconnect the cell rendering it useless. It takes about 2-8 weeks for this voltage drop to happen in a cell at 6%.

How much is too much amperes for Redmi Note 9S

I installed this Fast charging module :
FastChargingByNotZeetaaV3.zip
drive.google.com
before I installed that it showed 300 -500 mA charging .
Now it shows 2200 -2500 mA .
Is this Current Is fine ?

Fast charging typically uses between 2000-4500+ ma.
In general:
If it's delivering higher than 1000 ma at 90% or higher that may be stressful for the battery.
Charging current should start ramping down at 80%.
If it allows fast charging at temperatures below approximately 72°F and certainly 50F this is highly undesirable.
Likewise it should terminate charging above approximately 103F
Li's love frequent midrange power cycling ie 40-72%. Fast charging will decrease battery lifespan somewhat. Charging beyond 80-90% will as well regardless of charge current.
Optimum start charging temperature is 82-90F.
Never attempt to charge a Li below 40F!

blackhawk said:
Fast charging typically uses between 2000-4500+ ma.
In general:
If it's delivering higher than 1000 ma at 90% or higher that may be stressful for the battery.
Charging current should start ramping down at 80%.
If it allows fast charging at temperatures below approximately 72°F and certainly 50F this is highly undesirable.
Likewise it should terminate charging above approximately 103F
Li's love frequent midrange power cycling ie 40-72%. Fast charging will decrease battery lifespan somewhat. Charging beyond 80-90% will as well regardless of charge current.
Optimum start charging temperature is 82-90F.
Never attempt to charge a Li below 40F!
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is this file supposed to charge down at 90% or higher .
also I am afraid . and I changed the ampere in the module
all changes are shown in the pic
# was 2450000 changed to 15000000
im not a expert btw .
is there any documentation that i can look up ?
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Don't know. Never played with that.
All my devices are running stock.
If you have complete control over the charging parameters you can definitely cause damage even a battery failure with improper settings.
A battery failure isn't pretty.
Stock devices have numerous safeguards to try to prevent that.

I turned on Restricted Charging which was turned off by the Module file .
and limited to 1500 mA instead of 2450 .
right not watching battery temps and amps . will let you know once 100% .

keisezrg99x said:
I turned on Restricted Charging which was turned off by the Module file .
and limited to 1500 mA instead of 2450 .
right not watching battery temps and amps . will let you know once 100% .
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1500 ma is typical low from 6-72% of course this also depends on the battery's capacity and the phone's design.
The figures I quoted apply to a Samsung N10+ with a 4300 mAh Li.
When you start altering hardware parameters you run the risk of damaging components.
Not saying you will but keep that in mind. Generally manufacturers optimize charging settings for best charging and battery longevity.
Any battery swelling is a failure, replace it asap if this occurs. It can damage the phone.

the reason why I'm doing this in first place , When i flashed a custom rom , it barely charging . It took like 5 hours to charge .

keisezrg99x said:
the reason why I'm doing this in first place , When i flashed a custom rom , it barely charging . It took like 5 hours to charge .
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Yeah that's no good.
Monitor it carefully until you understand its settings and know it's working as you want it to especially in the fast charging mode.