yashsingh1/xdaforums huggingface dataset:
[EVO 4G Android Development] :
used my phone with what i consider heavy use

4g for most of the time some high and lo signal areas

apps used

PANDORA 1 HOUR

WIFI TETHER 1.5 HOURS

HANDCENT 30 texts / hour average

DOLPHIN WEB 30 MINUTES

FACEBOOK REFRESHED 15 TIMES

i used a few little apps here and there you tube - pic gallery and took a few pics and uploaded them to fb. themed handcent ect.

SYSTEM:

Azrael 3.1

PRI 1.77

NET 4.3.3 SBC-CFS-MORE HAVS

fresh install of both kernel and rom ..

i charged full - wiped stats
[EVO 4G Android Development] BuddaBelly:
I think that's the question everyone has with this BUMP mod. I'm no dev or engineer so I'm not going to even pretend to know the technical issues behind the charging but I do know my Blackberry never drops like the EVO does. When I take my Blackberry off the charger it will discharge normally from 100 percent. My son has the droid and it doesn't have the EVO problem either. So my question would be why is it other manufactures can have thier phones come off an overnight charge at 100 percent and the EVO drops like a rock to 90%. Might be worth looking at say a Nexus or Droid kernel to see what the charging profile looks like.
[EVO 4G Android Development] jxs1984:
its the miui rom
[EVO 4G Android Development] EndlessDissent:
It must be the fourth G. It's weighing us down.
[EVO 4G Android Development] lovethyEVO:
The biggest reason to this is that from the factory the evo runs off the battery even while on the charger. In stock form when plugged into the charger and the battery is fully charged the charger is turned off and the evo runs off the battery. Other manufacturers use bump charge for lipos/liions and cut the battery off when it is fully charged so that phone runs off the power cable.

So far with my compiled htc #15 and v7 trickle i can use my evo on the charger and the charger doesnt get shut off (so far), it doesnt overheat, and i charge it with the screen on. Usually after about 5 hours of charging past 100% im sitting at around 4/2/0 +ma and then i just pull the charger. I also charge when i get down to around 50%. I use nothing but my seidio 3500 or sprint 2600 and i can stay on 100% with light use up to 30 minutes. Combined with the smartass governor htc# 15 sbc v7 is one hell of a battery kernel.
[EVO 4G Android Development] BuddaBelly:
That's a great explanation. I know what you say is right because my Blackberry will run off the USB without the battery. So I wonder if the EVO could be switched to run off the charger after the battery is fully charged?
[EVO 4G Android Development] Undef:
Trickle charge plus phone on == no danger

Yes, that is why this SBC kernel patch stops charging long before 4.3V. Your phone is consuming battery charge as it is receiving trickle charge. The two cancel each other out, leaving your phone fully charged but never overcharged.
[EVO 4G Android Development] EndlessDissent:
I don't think so. HTC would have had to put a second circuit in the phone so the battery circuit could be shut off, but I don't think they did.
[EVO 4G Android Development] dahauss:
so then WHY did my phone get to 110 Degrees in the car with the car cradle and using GOOGLE GPS for 30+ minutes?? that was using V7 kernel I think..

also if what you are saying is true, trickle would be better and would be OK to use as it wont hurt the battery. in that case, whats the point of the auto-bump charge?
[EVO 4G Android Development] :
it depends at what % you plugged your phone in - .. for example when you are well below 30% the charger will charge your phone at the rate of around 500ma or higher (as stated in the OP)- i have gotten up to 690 that i could see. and then you are discharging you phone at around 300 or more like around 450+ while using internet and gps at the same time . your phone is working overtime! especially if you are OC

if i use wifi tether and 4g for more then an hour while charging - my battery gets hot - even before using these kernel types.
[EVO 4G Android Development] xlGmanlx:
i would also be interested if its possible to lower the minimum volts before the battery shuts off, we might be getting robbed of some juice but could stretch it safely on the bottom end as well
[EVO 4G Android Development] EndlessDissent:
+1. Someone earlier in the thread mentioned that the default voltage for shut-off was much higher than recommended for Li-ion batteries and might be lowered, I think, .13V or something like that. HTC must have been extremely paranoid when they wrote the charging code.
[EVO 4G Android Development] beandogg:
I gotta say, I was pretty incredulous reading this thread because prior to this kernel I had tried every battery trick I thought there was. I've been running MikFroyo 4.2, which if you haven't tried, is BLAZINGLY fast. But I've been down to as low as 47 percent in 7 hours with light (just turning the phone on to check an email or two) use with the stock kernel with setcpu underclocking after the perflock was disabled.

My first day after installing the 131 v7 off the charger at 8am, light to moderate use (reading engadget, sending texts, emails), with setCPU but only underclocking with the screen off...at 212pm, 94%.

That's fricking amazing. I'm very happy. Thank you for your kernel.
[EVO 4G Android Development] xlGmanlx:
you mean this......BAM!

linky
[EVO 4G Android Development] lovethyEVO:
EDIT: After reading the link above me I am going to check this on my spare time.
[EVO 4G Android Development] yesca213:
lm looking to try this #131, to try and extend life on my 1500 mah battery. i'm running sprint lovers rom, will it work? how do i flash just the kernel? and do you know where i could find the latest version?
[EVO 4G Android Development] xlGmanlx:
Post 2 has latest version, flash like roms and wipe caches twice before flashing. Of course you already made a nand
[EVO 4G Android Development] yesca213:
yes i have a nand. thanks im gonna give it a shot now
[EVO 4G Android Development] dsEVOlve:
I'm seeing similar results with the 131 kernel. I downloaded it yesterday and flashed. Charged overnight and took off at 8 am. Kept at 100% for the first hour so I was optimistic but right now I'm sitting at 73% which is similar to what I was getting with Net's 4.3 more aggressive before flashing 131. I am running Fresh's latest with only 3G turned on, light usage. I thought having that extra 10% to begin the day would leave me at about 80% by 5 pm but like I said, no diff.

Should the SBC kernel show up any differently in the description under software info? Right now I wouldn't be able to tell the difference from SBC and non SBC from the description.

UPDATE: Charged overnight, took phone off charger about 30 minutes ago and now at 89% . I'm not seeing ANY benefits from 131 and people are reporting some scary stuff so I am flashing back to Net's 4.3
[EVO 4G Android Development] dahauss:
SO has anyone come to any word if BUMP is better then trickle in terms or battery safety? I really dsont want to blow up my battery by using it while its charging or letting voltage to the phone battery all the time while it is plugged in.

anyone? Im a little paranoid since reading the ziggy post.. Im not worried about messing up my battery, I am worried about causing a fire or something...

Thanks....
[EVO 4G Android Development] Likeachampion3:
SBC Kernel killed my battery today!!!

My battery was great for the week or so that I was on the SBC kernel and then yesterday I thought it was charging slowly and dropping too fast. I did a reboot this morning when it dropped 25% with no use in 3 hours, plugged it into the USB, and was using it sparingly. Just a little bit ago I noticed that the charge light was off and now I can't turn the phone on or charge it. I have tried multiple USB cables and AC plug ins, nothing does anything to it. No charging, nothing.

I just got my hands on my wife's Evo and switched batteries and sure enough, her battery works just fine in my phone. Going back to the stock HTC kernel for 3.7. Note that I checked the battery stats and my System Panel app for usage history and nothing is out of the ordinary. I went from about 30% charge to ZERO instantly while it was plugged in!

Anything else that I should check just in case?
[EVO 4G Android Development] vaelek:
I have now had 2 reports of people using the v7 kernel who now have fried batteries. The symptoms were pretty much identical.

All is good for a while and then charging begins to go very slowly and either just dies or starts actually dropping while plugged in and then dies. One took the battery to a Radio Shack and they tested it and it had voltage, but it would not power the phone or charge at all.

I have been using it for 2 weeks as of today and I have not noticed any problems myself, but this is starting to make me a little concerned as the v7 nohavs is the default kernel in my rom due to the bold statement(s) in the OP regarding the (lack of) dangers.
[EVO 4G Android Development] fastfreddy7:
Ok, so I m pretty sure that since I installed this kernal, my GPS doesnt work now. never had any problems with it before. Any ideas?
[EVO 4G Android Development] lehalter:
If you run the Sense Removal zip and get rid of it, is this still the kernel you should get?
[EVO 4G Android Development] doorpz:
Just wanted to give a heads up that I couldn't get hdmi out to work with sbc netarchy 4.2.2 more havs cfs v7 and mikfroyo 4.2. I flashed over to HTC KERNEL #15 v7 and it worked fine.
[EVO 4G Android Development] dahauss:
Im hoping BUMP V8 doesnt have the same effect.. that is what I am sticking with.. I just wish MS would give us more info on the V8 kernel...
[EVO 4G Android Development] Likeachampion3:
I do have kind of a major update though, so I am happy that many more have seen the thread and I'm not the only one seeing problems...check xda and there is even one example of a battery starting to smoke. Anyway, I purchased a $4 external battery charger for some reason when I originally got the phone and thought I would give it a whirl to see if it had any effect on the battery....and it did.

Since I was frustrated and wasn't thinking it would work, I just kept touching the contacts on the charger to the battery in various combinations until one of the green lights started blinking. I left it plugged in for about an hour and then put the battery back into the Evo...sure enough it booted up! Keep in mind that I couldn't get the battery to charge AT ALL while in the phone, and since the battery was DEAD to the world I could not boot the phone or anything with it. I got my phone on long enough with my wife's battery to change to the HTC kernel, but otherwise my phone was no good with the original battery.

So the phone booted miraculously after I pretty much used a defibrillator on it :D but the battery widget said 16%...then 15%...then 14%, all in a span of about 45 seconds. So I immediately plugged it into an AC outlet charger and it started charging back up, albeit slowly (or so it seemed). So here I am a few hours later with my Evo running, but plugged in. If I unplug the cord, I am losing up to 3-5% in charge every minute, but it seems to be OK otherwise. It got so far as to the LED turning green while turned off, but was down to 96% by the time it booted.

I have to be perfectly honest and admit that I am thoroughly confused about what is going on, so hopefully someone has some ideas. I'm happy that it kind of works right now, but I realize that the battery is all but dead at this point.

Why does the Battery Widget still say the health of the battery is "good"?
[EVO 4G Android Development] Spacegoogie:
What kernel for CM 6.1.2?

First let me say Thanks for this, as I'm using it right now, I ditched my 3500Mah battery and put the stock back in. WOW, my phone is sooooo thin now, lol I have been using the 3500 battery since the day I got my phone (back in july) and what a trip. Anyway I seem to be confused with all the kernels going around. The one you linked to seems to be working but I have some screen tearing, and blue-tooth does not work. I'm looking to keep the great battery life but would still like to have blue-tooth working and no screen tearing. So whatever you can recommend or link so I can give them a whirl. Thanks much for your help and all your hard work bro.
[EVO 4G Android Development] OneStepAhead:
SBC: It's all fun and games until your phone explodes and blows off your ear!

I'm still rocking #15 SBC, the battery life is great. It's actually more then I need though. The stock #15 on my oem battery usually gives me 24-30 hours, the SBC #15 gives me more like 30-40 hours. I really only need my battery to last 16 hours, anything else is overkill as I charge it when I sleep anyways. The dork in me wants to use the SBC kernel anyways :D

The secret to long battery life is staying on wifi. Anytime im using 3g, the battery life takes a major hit, I'm talking 50-75% less then I get when I'm on wifi. I also use Locale to turn wifi scanning off when I leave the house and back on when I'm home.
[EVO 4G Android Development] OneStepAhead:
If your running a Sense Rom (I personally use Warm2.2 RLS 5) I would download the #15 kernel at the start of the first post.
[EVO 4G Android Development] dahauss:
Honestly, IMO, I would ONLY use BUMP CHARGE.. WHY? because it does exactly what the phone does on its own but more frequent. it doesnt leave constant voltage on the battery so I THINK it is safer. I now see a few people on here using it.. I am using it with SPRINT LOVERS SENSE ROM and it works awesome. Unless I hear otherwise, I think that I will be sticking with it due to all the battery issues I see from all the trickle kernels..

Now, if MS could just EXPLAIN how exactly the v8 kernel works...
[EVO 4G Android Development] pardonmyownage:
From the Savage Kernel Thread

Alright here we go, i understand this should be in the SBC thread, and i will post the same thing there. upon reading that site i'm assusming the main thing we are talking about is this...

No trickle charge is applied because lithium-ion is unable to absorb overcharge. A continuous trickle charge above 4.05V/cell would causes plating of metallic lithium that could lead to instabilities and compromise safety. Instead, a brief topping charge is provided to compensate for the small self-discharge the battery and its protective circuit consume. Depending on the battery, a topping charge may be repeated once every 20 days. Typically, the charge kicks in when the open terminal voltage drops to 4.05V/cell and turns off at a high 4.20V/cell.

But just to make sure that we are talking about the same thing, i checked out wikipedia

A float charger differs from a trickle charger in having circuitry to prevent overcharging. It senses when the battery voltage is at the appropriate float level and temporarily ceases charging; it maintains the charge current at zero or a very minimal level until it senses that the battery output voltage has fallen, and then resumes charging. It is important to note that the appropriate float voltage varies significantly with the construction of the battery and the ambient temperature. With the appropriate voltage for the battery type and with proper temperature compensation, a float charger may be kept connected indefinitely without damaging the battery. With a 6-cell (nominal 12V) lead-acid battery the correct float voltage drops by about 0.15 V for a 5°C rise in ambient temperature. Not compensating for this will shorten battery life either by over- or under-charging.

according to what i've read and what i see with my battery charging, the battery reaches a certain voltage and reduces the mA charging to almost 0. according to wikipedia, this seems MUCH more like float chargning, than actual trickle charging. maybe someone could back me up on this? so what we have is a miss use of terminology. according to the charging site, 4.2 is well inside the safe limits and if you dont overcharge or undercharge you are safe. since SBC doesnt over charge, but in a sense float charges, i think we are in the clear.

someone look over this and confirm my findings
[EVO 4G Android Development] dahauss:
I still dont trust any trickle especially if ANY of the reports of the battery issues are true and not just from a bad battery or charger or something.. BUT since BUMP is what HTC uses and the v8 is auto-bump, I would assume we are much better since there isnt constant voltage on the battery....
[EVO 4G Android Development] BuddaBelly:
I think you actually asked ms79723 which was safer and he said bump technically would be.
[EVO 4G Android Development] fmedina2:
Sooo, where can I download the stock kernel? :(
[EVO 4G Android Development] dahauss:
Yes I did but we still dont know how his kernel does the auto bump charge.. is it a % drop, and what amount, before it starts charging again? is it a voltage drop and what amount, before it starts charging? I ask because this morning I woke up with 95% left on the battery when I left for work. HOWEVER, I went to work and recharged and was back to the normal 100% for a few hours (in standby) before it dropped to 99% and was at 71% tonight, just a little while ago (although I did put my phone on the car charger for 10 minutes when I was driving home).
[EVO 4G Android Development] DRUMSBH:
Any chance at a #15 BUMP charge instead of the v7 MS?

Thank you so much for your hard work on this. I dig it!
[EVO 4G Android Development] Spacegoogie:
I cant believe I did not put the rom I'm using, sorry. I'm running CM 6.1.2
[EVO 4G Android Development] chogardjr:
You are exactly right. Using the SBC kernel will improve your battery life but if your one of those who constantly hooks up to the charger and pulls it off before its 30 minutes or so past 100% then you will start to see the quick drop in %. This kernel is meant more for people who can go all day without needing to charge till at night. Not so much for those who use a lot and have to put on the charger multiple times a day. In that case use the original kernel. I have tested the SBC against my wife unrooted 3.70 with #15 and can say she can go 8 hours with heavy use before needing to charge. I use SBC nets 4.2.2 havs less and with heavy use can get about 10 hours. Long story short, if you are so low you have to keep hooking up to a charger then use the original kernel. If you don't have to recharge till night or not using for long periods then SBC is right for you. Also lithium plating of the battery starts when you get to 4230 mW. I have yet to see any of the SBC kernels go anywhere over 4206. These kernels are safe and batteries will last if you use it correctly.

From a Super Baked Evo #0002
[EVO 4G Android Development] chogardjr:
Stock kernels do this "bump" charging. But you need something like battery monitor widget to see when its bumping again or when the last bump was so you don't get upset about fast % drops from 100%.

From a Super Baked Evo #0002
[EVO 4G Android Development] EndlessDissent:
That'd be the one. Good find.
[EVO 4G Android Development] Product F(RED):
I don't mean to discourage you guys from using SBC kernels, but it's for your own good. Read this: http://xdaforums.com/showthread.php?t=904577
[EVO 4G Android Development] fixxxer2008:
yeah im getting rid of the sbc kernel now. not taking a chance. this should be looked into by the devs.
[EVO 4G Android Development] ccossin:
The sky is falling, the sky is falling!! Not too long ago you were all raving about these kernels.

I've been using the original version 131 since it came out and have had ZERO problems.

Look, if you're that concerned about your phone exploding then take it off the charger as soon as it reaches 0mA. This will ensure you don't blow it up.

I spoke to the developer of the Battery Monitor Widget and so the recent update to the app includes audio alarms. One alarm for when the battery is"full" and one for when it actually reaches 0mA.

It doesn't get any easier. Put your phone on the charger, wait for the 0mA alarm, and take phone off the charger. Easy peasy.

This has been a telepathic transmission from the Outer Limits.
[EVO 4G Android Development] fixxxer2008:
some people charge there phones over night, so that's not an option. im not dissing this kernel at all but i like to play it safe. i never had horrid battery life to begin with even using stock kernels.
[EVO 4G Android Development] bb2ppc:
Help needed I'm getting poor Battery life

After the Kernel update my battery life has been going down but the sec. Any hellp on this.
[EVO 4G Android Development] dahauss:
SWITCH to the AUTO BUMP CHARGE KERNEL. I dont know much about it but since it is more like the way HTC wanted the battery charged, I ASSUME it should be safer. its not leaving current on the battery all the time. This is especially good for people like me that leave the phone on the charger at night and take it off in the morning..
[EVO 4G Android Development] Agfadoc:
Dude, you posted the same thing on Myn thread... Which is it? which did you flash last? It makes you sound like you are just guessing.

IMO Check your 4G to see if it is on.
[EVO 4G Android Development] bb2ppc:
I did both upgrades and got the same results with both kernel and RLS 5 ROM.

4G is off
[EVO 4G Android Development] MikeC84:
Any one else read the threads about SBC killing the battery and even damaging it (smoking) "most likely caused by SBC"

I seen a few threads about this. Is this safe lol I been using it since it came out and it seems like my batteries are getting worse life so I stopped using this.

http://xdaforums.com/showthread.php?t=904577

http://forum.androidcentral.com/htc-evo-4g-roms-hacks/51972-sbc-killed-my-battery.html
[EVO 4G Android Development] Agfadoc:
You need to check your radios verify you are using 3.70 compatible

You need to flash one thing at a time so you can identify which is the offending culprit.

Did you wipe data/Dalvik/and cache prior to flashing these?

Are you using SetCPU?

You can wipe Dalvik and Cache and then flash #15 standard, and see if it still continues..

Or you can just start over and wipe everything and then do one at a time making sure everything is compatible.
[EVO 4G Android Development] bb2ppc:
I did a complete wipe, data/Dalvik/ and cache, flashed with Calkulin's recommend Radio/Wimax combo.

Im not using SetCPU.
[EVO 4G Android Development] MikeC84:
I have read SBC can kill your battery. Try using the included kernel see if that helps.
[EVO 4G Android Development] Product F(RED):
SBC does damage your battery. I bought the Sprint 2600 mAh extended battery myself and am going to exchange it for a new one. The first few times I charged it, I was on the SBC kernel (now I'm on HTC #17). It'll charge to 100 but will go down to 90 fast. Normally, it should only go down to 95 quickly. I even calibrated the battery correctly.
[EVO 4G Android Development] bb2ppc:
Where did u get HTC # 17 from?
[EVO 4G Android Development] Product F(RED):
http://xdaforums.com/attachment.php?attachmentid=442759&d=1289958278

You have to downgrade your radio to 09.11 and PRI to 1.77_33 to use it if you're on Myn's RLS5. That's AFTER you have the ROM up and running. To actually have the ROM start up the first time, you need to be on the latest radio (11.19) and either PPRI 1.77_33 or 1.90. After that, downgrade to the ones I mentioned.
[EVO 4G Android Development] bb2ppc:
I am going to try this RIGHT now
[EVO 4G Android Development] MikeC84:
Kernel # 15 is the latest kernel. Use it with 3.70 roms.
[EVO 4G Android Development] Product F(RED):
Yes, but HTC #17 also works with 3.70 based ROMs if you downgrade your radio. HTC #15 is not as good as #17.
[EVO 4G Android Development] fixxxer2008:
whats soo great about 17 compared to 15?
[EVO 4G Android Development] Product F(RED):
Battery life. HTC #17 is the best kernel HTC put out. I was able to squeeze out 15 1/2 hours on moderate usage.
[EVO 4G Android Development] fixxxer2008:
but id have to downgrade my radio for it too boot right?