Hi guys a have a Dell Venue 8 3830 that needed a battery replacement. However I bought one by error that is 4550mAh 3.8V 17.29wh the one that is on the tablet is 4100mAh 3.7V 15.17wh. So after I installed the new battery everything is ok for around 5 minutes but after that, it shutdown saying "Thermal Shutdown, Thermal Critical Event Occured". However the problem is that the reported temperature suddenly jumps from 20c to 60C for 1 core and then the thermal shutdown error pops, but the tablet by itself is not that hot. So i was thinking that this could be the software, acting up on that .1v difference.
So the question is, Is there any file I can edit so the rom doesn't get tripped by the change of that .1V or this can't be done ?
Thanks.
Related
Hello,
I've had an interesting experience with my x10 mini pro today. After unlocking (from keypad lock) the phone it suddenly vibrated frantically and the led blinked angry red (or is it orange?) alarmingly. When I checked that status bar it says something about the temperature is above 50% and I need to do something. I quickly lowered the setCPU to around 245700 min and 300000 max but it still vibrated alarmingly. I managed to remove the alarm by killing apps through advance task killer.
My default cpu speed is 300000 min and 600000 max on demand and 245k min and 32-k max when screen is off. I don't know why it suddenly heated like that (atleast the phone says it is. I touched the battery and it was as cool as normal). Is there any danger of frying my phone's chips with this value? I dunno if I'm an overclock junkie but I think my value is pretty much normal. I have heard of someone's WiMo (I think that's the host of Linux Action Show! I'm not sure) that his overclocked phone gets so hot but still works, although for just few hours before the battery gets drained. Have anyone seen a phone get fried because of overclocking firsthand?
BTW, I leave my phone USB-connected to my PC almost 8 hours everyday. Is this dangerous? I notice it stops charging when it gets full (the battery with lightning icon is gone) so I assume it's no problem. I hope I'm not wrong.
I hope someone can provide me (or if somebody else experienced it) with answers.
Try wiping baterry stats in recovery, if that dosent help try restoring with seus.
if you still have the same issue I think your battey is dead
OK I know this has been an issue with many devices since lollipop release , problem is most of the other devices doing a full wipe and cache fix the problem or maybe they get latest firmware updates, something I don't plan on getting from Dell anytime soon =\
Thing is my venue pro with kit kat had a battery life of around 3 days with moderate use since lollipop my battery have been draining even without using the device I notice my Android OS is 60%+ most of the time on battery consumption. Also it takes a lot longer to charge, sometimes I leave it overnight and when I wake up is not charged or sometimes it will just stay at the same percent even after few hours connected to the power.
I already did a full wipe and cache 3 times, anyone else with this issue and found a possible solution?
thank you.
yeah this is the only thing that makes me regret buying this tablet , the community is so low can hardly get an answer anywhere even from dell itself, doesn't even have his own forum space.. bad choice of naming and very poor effort marketing this otherwise awesome device!
Darkolako said:
OK I know this has been an issue with many devices since lollipop release , problem is most of the other devices doing a full wipe and cache fix the problem or maybe they get latest firmware updates, something I don't plan on getting from Dell anytime soon =\
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I have no experience with battery drain/slow charging with 4 devices upgraded to lollipop. 2012 nexus 7 (1st) fully recovery with official image, LG G2 with stock upgrade, venue 7840 with stock upgrade and LG Volt flashed CM12 from 4.4KK.
For stock upgrade, the key step is back to fully unroot status and receive official OTA and do a full factory reset, which wiped out all data and cache (including all apps). And if you prefer root, then root the device from a total clean start.
The battery with my 7840 is not the best, but still great. Usually, the drain of standby over the night (~8hrs) is ~5% or less with wifi on. And moderate daily usage (actually about 2hrs use during the evening) consumes approx. 30% battery. wakeup monitor shows only 2% of time the device is awake. This is greater than my nexus 7.
The only issue I have with 7840 is my device is a refurb one, so the battery drain is not linear, for first 60%-70% it drains linear, but after 30% left, it drains faster. But I'm feeling ok with that.
---------- Post added at 11:31 PM ---------- Previous post was at 11:23 PM ----------
Darkolako said:
yeah this is the only thing that makes me regret buying this tablet , the community is so low can hardly get an answer anywhere even from dell itself, doesn't even have his own forum space.. bad choice of naming and very poor effort marketing this otherwise awesome device!
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Click to collapse
That is true. I agree with you about this tablet.
Many people choose certain brand or model based on the community support, like nexus and galaxy devices. That is some research should be done before purchase.
However, certain common Android tricks or tips are working with all devices, like what I mentioned in previous thread to upgrade with stock update. Do not regret, it is actually a nice tablet though.
thank you for your reply
yes its true I own 2 note tablets and a nexus myself. I usually don't buy anything from dell but I had hopes for their "bezel less" products XPS 13 and tablets , they still are great and one of the best looking imo just need to get more noticeable to get more community support.
Greenify fixed most of my issues with the battery life on the tablet.
Sent from my Nexus 6 using XDA Premium HD app
How to switch Dell 7840 to quick charging (AC mode)
Darkolako said:
....Also it takes a lot longer to charge....
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I have the Dell Venue 8 7000 (7840) and it looks like when I plug in the micro USB cord (which is already connected to power socket), it charges very slowly - it was probably charging only in "USB mode".
SOLUTION: plug USB cable with AC adapter in to the tablet first and than into power socket - it switch to "AC charging mode" and charging more quickly.
Hello everyone,
I am fairly new to the XDA forums. I am constantly on here because I love all of the developer support and questions and answers that I can refer to. That being said, I have a question of my own.
Does the Nexus 9 heat degrade the life of my battery?
Now I am completely aware of all the issues of the Nexus 9 tablets. Light bleed, excess heat, too powerful of a processor. I've seen and experienced it all, but I still like the tablet for what it is worth.
When I first got the tablet back in mid-July, the first thing I did was plug it in for about 8 hours. I did use it in this time to update the software and the apps. I remember the tablet getting really hot (because any device does when it is charging). I kept using it but did not track the temperature or anything. It was really hot though, pretty much too hot to touch back there. I used it for about 30 minutes and then let it finish charging.After it was done charging, I just unplugged it and used it normally.
For these past 2 months, I have used the Nexus 9 a fair amount. Mostly for web browsing but I have also used it for a small amount of gaming and typing for school assignments. I installed CPU temp to monitor the temperature of the CPU. Within these 2 months, my Nexus 9 would always hang around 105 degrees F, especially in Chrome (I am aware of this issue as well). When downloading or updating apps, it can get a little hotter, maybe around 110 degrees F.
The other day, I flashed Android M on it (and am really happy with it, by the way). The tablet went through the "optimizing apps" screen, which takes forever. I notice that every time I get this screen, my Nexus 9 heats up like crazy. Once it was done optimizing all the apps, I went into CPU temp and my CPU was at 125 degrees F!! This is the highest it has ever gotten since I first got it, and I fear that temperatures like these will shorten the lifespan of the battery.
My Nexus 9 battery seems to be running the same, but with all this heat generated, will my Nexus 9 battery degrade faster in the long run? Thanks for all of your replies
Bump
Its normal, I also has a nexus 9 and what I did is get any app the support cool down device (root or noroot) and it should help and don't use chrome as default browser, because it try to use all the CPU power to perform fast (to fast sometimes) and because the nexus 9 has cooler problems and just makes it lag and to increase CPU. So just use other browser
EDIT: For those who don't like to read here is a short summary. The Speed 7 and Speed 7 plus do support "Pump Express (PE)". With the attached modified little kernel and boot image for the stock Android 5.1 rom and with a stock charger, you can shorten the charge time by approximately 30-40%. An other MediaTek quick charge variant called "Pump Express Plus (PEP)" is not supported. I am now using my own PE mod since almost 2 months and am very happy with it
Here starts the original full story text:
Last year MediaTek announced their Quick Charge solution called Pump Express & Pump Express Plus:
http://www.mediatek.com/en/features/power-management/pump-express/
My Zopo 7 needs about 5 hours to fully charge when it is down to about 7%, so I tried to find out if Pump Express could be a solution.
A reasonable well explanation of Pump Express can be found here:
http://gadgetstouse.com/gadget-tech/mediatek-pump-express-charging/44855
And here is another document which compares QC and Mtk quick charge mechanisms:
http://www.panjit.com.tw/upload/en/product_app/6_product_app_file_1.pdf
It also mentions that the MT6753 chipset inside the Zopo Speed 7 does in fact support "Pump Express Plus". I then wondered what is further required to support it and I found one needs a battery charger with a charge controller ic such as the ones described here:
http://www.dialog-semiconductor.com/sites/default/files/mediatek-pump-express-adapter-solution.pdf
Such a battery charger is capable to deliver different power stages to the phone depending on what it senses on the USB VBUS supply line. An example of such a charger is this one:
http://de.aliexpress.com/item/In-St...Halo-H3-Quad-Core-4G-LTE-5-0/32285686209.html
I haven't tried such a charger myself yet and I would be very interested to hear if someone.
EDIT1:
In this Zopo support forum the administrator replied possibly the motherboard charge circuit limits the current. I want to verify if that is indeed the case and ordered a mediatek "pump express plus" compatible charger and will test it with my speed 7:
https://www.coolicool.com/original-usb-quick-charger-for-bluboo-x550-smartphone-g-41028
EDIT2:
In the stock kernel config the pump express options are not enabled, so I will have to build a new kernel or "borrow" a boot image from another device where it is enabled.
EDIT3:
I flashed a boot.img from a Ulefone Power stock rom. The Ulefone also has a MT6753 and supports pump express plus (pep). Unfortunately, my zopo doesn't boot up. So must build a custom kernel with pep enabled.
UPDATE1 (24/03/2016):
I have built a boot image and a little kernel (lk) with "Mediatek Pump Express (PE)" support for Zopo Speed 7. After I receive my "Pump Express Plus (PEP)" compatible charger I will also build a boot image and little kernel with PEP support. PEP software support depends on the charge chip that is built in the charger, so I need to open that charger to figure it out. I have just measured whether my phone charges quicker and indeed it is a lot faster now with a 5V/2A charger (see below). Everyone with a Zopo 7 and knowledge how to flash lk and boot images is invited to test. Of course I cannot be blamed or held liable if you damage or brick your phone with the attached software. My phone works fine with it.
I monitored charge percentage level and started charging with the phone powered on at a level of 15%:
17:45 15%
17:52 17%
18:09 28%
18:15 32%
18:45 50%
19:15 68%
19:45 87%
20:07 100%
That implies from 0 to 100% in 167 minutes which is less than 3 hours! Before, with the same charger it took 4-5 hours
The charging is a perfect linear curve and that is, as I understood it, exactly what Pump Express is supposed to do. I am hopeful Pump Express Plus can work too. Lets see in a couple of days when my charger will be delivered. To be continued ....
EDIT4:
I have done a cross check with the original boot.img and lk.bin: charging takes 2:20 minutes per 1%. With my Pump Express (PE) boot.img and lk.bin it takes 1:40 minute per 1%. So a full charge with my kernel built is almost 30% quicker
UPDATE2:
Added Pump Express (PE) enabled boot.img and lk.bin for the Speed 7 Plus (I own a Speed 7, so I can't test these files). Make a full backup with TWRP or CWM recovery and then try it out.
UPDATE3:
I received information about the charger hardware of the Speed 7 models directly from Zopo (thanks Charles Bird !): unfortunately the hardware does not support switched chargers and therefore also no Pump Express Plus
great job man!!
keep on updating us
Fingers crossed you crack this for all us Speed 7 users matey
I have updated my first post (UPDATE1) and attached a boot image and little kernel which support Pump Express.
thanks for your job!!
just to be sure: did you test that on Speed 7 or Speed 7 Plus?
Speed 7
I will build Speed 7 Plus images in a few days.
jockyw2001 said:
Speed 7
I will build Speed 7 Plus images in a few days.
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damn
do you think it is supposed to work on Speed 7 Plus?
---------- Post added at 10:36 PM ---------- Previous post was at 10:35 PM ----------
uh sorry I didn't read second part of your message
thanks!
jockyw2001 said:
I have updated my first post (UPDATE1) and attached a boot image and little kernel which support Pump Express.
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Click to collapse
I'm willing to be a guinea pig and try the files out, can they be flashed via SP Flash Tool or Flashfire?
I use SP Flashtool. Save my lk and boot files in a new folder and copy the scatter file to it.
I have done a cross check with the original boot and lk: 2.3 minute per 1%. My pump express boot and lk: 1.67 minute per 1%
jockyw2001 said:
I use SP Flashtool. Save my lk and boot files in a new folder and copy the scatter file to it.
I have done a cross check with the original boot and lk: 2.3 minute per 1%. My pump express boot and lk: 1.67 minute per 1%
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Click to collapse
Gotcha :good: I'm a bit busy over the next few days, so I'll have a play about with the files probably Sunday night. Btw did you see that Carliv released a tweaked boot.img of his own? Any chance of you having a look and then incorporating his changes in to your boot.img along with PE (and PEP eventually). Thanks again for all your effort and work you're putting in to this matey
Added Pump Express (PE) enabled boot.img and lk.bin for the Speed 7 Plus to my 1st post. Happy easter!
jockyw2001 said:
Added Pump Express (PE) enabled boot.img and lk.bin for the Speed 7 Plus to my 1st post. Happy easter!
Click to expand...
Click to collapse
I tried the Pump Express on my Speed 7 Plus and I could charge the phone (from 16% to 100%) in 2h and 45 minutes! that's great!!
but not only the charging speed has increased: discharging is faster than before.
with stock lk and stock boot I could reach 4h of screen ON but now I can't even reach 2h. Also during the night the phone lose about 2,5% per hour (from 50% to 30% in almost 8h).
is this normal?
another (very weird) problem: when I connect the charger to the phone, battery discharges faster and faster (17% to 11% in 5-6 min) and it keeps on discharging till I reboot the phone. after reboot the battery starts to charge
marcol87 said:
I tried the Pump Express on my Speed 7 Plus and I could charge the phone (from 16% to 100%) in 2h and 45 minutes! that's great!!
but not only the charging speed has increased: discharging is faster than before.
with stock lk and stock boot I could reach 4h of screen ON but now I can't even reach 2h. Also during the night the phone lose about 2,5% per hour (from 50% to 30% in almost 8h).
is this normal?
Click to expand...
Click to collapse
Thanks for testing and reporting!
The discharge behavior is of course odd and something I will look in to. I didn't notice that on my Speed 7, but I will systematically check and compare the discharge curve of my Speed 7 with my kernel and the with original kernel. Some problems may be caused by the kernel, because the source code I used s not the latest version. Zopo published the source code of kernel v3.10.65 on 10/10/2015, but the kernel version in the latest published rom is of 28/12/2015 and is shown as version "3.10.65+" in the about phone settings menu. I suspect they fixed a few bugs in that version. I will ask Zopo whether they can share the latest kernel source code.
marcol87 said:
another (very weird) problem: when I connect the charger to the phone, battery discharges faster and faster (17% to 11% in 5-6 min) and it keeps on discharging till I reboot the phone. after reboot the battery starts to charge
Click to expand...
Click to collapse
After flashing the new files I recommend to power off the phone and remove the battery for about 20 seconds. This ensures the PMIC (power management ic) is properly resetted.
due to those problems I'm forced to reflash stock lk and boot.
I hope you'll fix them, anyway thanks for you job!
jockyw2001 said:
After flashing the new files I recommend to power off the phone and remove the battery for about 20 seconds. This ensures the PMIC (power management ic) is properly resetted.
Click to expand...
Click to collapse
can I do this now? or should I reflash the files again?
Before reflashing stock boot and lk I would advise to remove the battery for about 20 seconds and then test again.
I tried to remove the battery for 20 seconds but the problem persists (from 38% to 16% during the night, about 7 hours).
so, with 16% of battery, I reflashed stock boot and lk, removed the battery for 20 seconds and after the boot the battery was magically at 58%.
Now it's at 29% and I'm still using it.
marcol87 said:
so, with 16% of battery, I reflashed stock boot and lk, removed the battery for 20 seconds and after the boot the battery was magically at 58%.
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That shows the battery charge value is not correctly displayed when you use my files and the battery calibration must be resetted. I found a procedure somewhere in the zopomobile forums once, but I haven't got a link right now.
jockyw2001 said:
That shows the battery charge value is not correctly displayed when you use my files and the battery calibration must be resetted. I found a procedure somewhere in the zopomobile forums once, but I haven't got a link right now.
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I could not find that procedure.
I'll try with Battery Calibration app from the playstore, do you think it's a good solution?
Hello! I'm having issues with my Dell Venue 8 7840 tablet battery. So far it seems like an weird problem that i can't find people with similar issues anywhere, or maybe am not searching the right key words.
So, here is the thing, everytime the battery status reaches 37% it turns off like there is no charge anymore. If I turn on again, it turns off right after. So far as I can remember it started at 28%. I've tried reseting the device and battery calibration, neither changed anything. The weird thing is (at least for me) the max capacity is 4300 mV, but when i was using (another) calibrating app, the mV reaches only 3479 before turning off, and the animated status indicator showed like it was completely empty.
There is an dell app that verifies if the battery is working normally, and so far it hasnt flagged any issue.
Not sure for how long it has been happening.
Bought: one and a half years ago
Model: T02E001
Android: 5.1
Kernel: 3.10.62-x86_64_moor-g774f842
Service tag: J7QKR02
Software: Venue 8 7840-user 5.1 LMY47I BBP803A173600DEL release-key
PS: there is a slight lift on the screen that i've heard could indicate a puffed battery, but it really really small, and it has been there since i bought. At least it doesn't look like it got worse with time.
If anyone could help me!