Warm to touch when charging? - Nexus 6 Q&A, Help & Troubleshooting

Just got my Nexus 6, thank you very much motorola. I notice that when I put it to charge on the provided charger and usb cable, the phone feels warm/hot to the touch while charging. Is that normal or not? It's just sitting on a desk plugged to the wall with plenty of air around it.
Tia,
Ian B

Mine got warm the first time I used the provided charger but not hot. I charge overnight on qi charger it gets slightly warm. Hot would not be normal unless you consider hot as warm

jbdan said:
Mine got warm the first time I used the provided charger but not hot. I charge overnight on qi charger it gets slightly warm. Hot would not be normal unless you consider hot as warm
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Thanks for info. Decided to take it off the motorola charger for the first night and use a regular Samsung cable. Will power off tomorrow and restart to charge afterwards and see if that fixes the problem. It's not scorching jot but feels very warm to me.
Ian B

This is normal behavior. The turbo charger produces a substantial amount of heat especially when the battery is low. If you give it time to charge you will find the heat tapers off as the battery fills.

robber said:
This is normal behavior. The turbo charger produces a substantial amount of heat especially when the battery is low. If you give it time to charge you will find the heat tapers off as the battery fills.
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Click to collapse
The Moto Turbo charger (Quick Charge 2.0), at full throttle, pushes 14.4W of power into your little battery, whereas a conventional 2A charger (Quick Charge 1.0), pushes only 10W. With great power, comes great heat. (...or something like that. I heard it in Spiderman.) Seriously, excess heat will be generated, but that was all taken into account by the designers, and is perfectly normal. That's exactly why the QC 2.0 chargers ramp down the power as the battery gets full -- It's filling it as fast as it can when the battery is almost empty, just in case you REALLY need it right away, but as it gets closer to full, it's less likely to be an emergency, so there's no compelling reason to keep generating all that heat while it finishes up the charge.

Thanks everyone for responding. Now I understand and wanted to make sure there was nothing defective with phone or charger.
Ian B

Related

Building a Nook Color extended battery

So after looking at the teardown and assembly info online, I've started to percolate a notion in my head to double the battery capacity of the NC.
My thinking is that if you sacrifice a bit of structural reliability by cutting out the portion of the plate the battery is on, you could cram another NC battery, scavenged from the ruins of a dead one, into there and wire it in parallel. The end result would be a heavier, probably slightly girthier, NC, with 8000mAh of life. I don't care how bright your screen is or how many rooted roms you're using, that fool will last a looooooong time.
My question is primarily for electrical folks here: any pitfalls to watch out for? Do we know if there's any circuits in the battery itself that might interfere or is the battery unit just a collection of Li-Ion packs?
Of course if you think I'm a mad scientist who must be stopped at all costs, please feel free to chime in too. Just stand over there on the scorched X on the floor next to the death ray...
Hmmm if the kernel allows for a charge higher than the one its in now. Like the evo charging issue with extended battery
Sent from my PC36100 using XDA App
BrianDigital said:
Hmmm if the kernel allows for a charge higher than the one its in now. Like the evo charging issue with extended battery
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Don't believe I've heard of this. Whassat?
loganthered said:
Don't believe I've heard of this. Whassat?
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Click to collapse
Like he said: Whaa? I had an EVO [fun] but couldn't stand the less than less-than-stellar battery life. I'm talking dead by 4pm crap. Bought an extended battery and noticed no improvement. Is that why? Finally downgraded to an EVO shi[f]t [less fun] but I'm not getting the kind of improvement I would've expected going from a 4.6 to 3.6 inch screen, after all aren't they the biggest battery sucks?
sounds too scary for me!!! I think I'd rather just replace the battery (if it is possible to purchase one...)
The main issues would be....
1. extra strain on the charging circuit.
2. the possibility of battery imbalance...leading to extra strain on charging circuits...possible overheat...boom
3. possibility of overheating due to combined heat from 2 batteries during heavy charging...boom.
make sure all of those are taken care of and you are golden. Personally, I would source a larger amperage battery with similar dimensions and wire it in.
I like the idea, carry on
Why not just charge thru USB? Car adapter or external power pack?
UCSB said:
Why not just charge thru USB? Car adapter or external power pack?
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Because that defeats the purpose of bringing it a long for camping ;p or being marooned on an island with a black fog monster and a bunch of other idiots.
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
ExploreMN said:
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
Click to expand...
Click to collapse
Which model do you recommend?
Duck brand duct tape is pretty good
Gorilla works well too
ExploreMN said:
Just get the Energizer XP8000 and a little duct tape and you can get about 10+ extra hours out of it.
Click to expand...
Click to collapse
I have one of those, and yes it will charge the Nook Color on the go.
Just a little heads up on the topic, android stores battery info in the boot partition I believe and that's what tells the kernal the status of the battery, I.e. a double capacity battery would report as fully charged when only half charged if you didn't Pachelhoffer the is/kernal and such to match the new capacity.
Correct me if I'm wrong!
Sent from my NookColor using Tapatalk
use external battery pack
deadbot1 said:
The main issues would be....
1. extra strain on the charging circuit.
2. the possibility of battery imbalance...leading to extra strain on charging circuits...possible overheat...boom
3. possibility of overheating due to combined heat from 2 batteries during heavy charging...boom.
make sure all of those are taken care of and you are golden. Personally, I would source a larger amperage battery with similar dimensions and wire it in.
Click to expand...
Click to collapse
These are excellent points. I would avoid hacking the internal circuitry and instead get a hold of an external battery, design a circuit to drop the voltage to 5v and use the usb cable to charge up the battery. Trying to charge two batteries in parallel is asking for trouble because of the imbalance problem.
d.v said:
Which model do you recommend?
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For the price, I got the XP1000 I think (its in my backpack which I left at work) I actually got it for my Epic to charge when I was out and about and moved around too much to use a wall charger. Works on the Nook too, but I haven't tried a real charge to see how much I get out of it. I would guess if I can charge my Epic 2-3 times that I could at least recharge the Nook once completely.
Warning - be careful screwing around with the internal LIPO battery and circuits. If something damages the single cell battery or voltage gets to low, and you try to add voltage and amps to it, it might puff up and if it does its flammable!
Its a single cell LIPO pack like used in rc airplanes and cars! They are very finicky to say the least when it comes to discharging and charging. Let alone if you want to hook up another one to it and do it wrongly! People have burnt down there whole house at night just over charging one and not babysitting the charging progress!
It is a lithium-polymer battery and not a lithium-ion!
They can catch fire when they puff instantly, many videos on youtube!
Correct me if im wrong, but the battery has a built in monitor and charge stopper so if you were to charge both the batterys via the micro usb slot you would need some sort of trickle charge/sbc kernel mod to overcome this which could be a real pain in the arse and not to mention dangerous considering trickle charge has been known to damage batteries on occasion and we do not have an easily replaceable battery.
I have this unit, http://www.amazon.com/gp/product/B0038VQET4. It will completely charge the battery of the nook.
jerrykur said:
I have this unit, http://www.amazon.com/gp/product/B0038VQET4. It will completely charge the battery of the nook.
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And a lot of other things, I'd gather, judging by the number of "tips" it comes with.
Do you have any idea if it will charge an NC more than once?

Wait before u buy charging cable cause the Thickness of the does mean alot

OK so like some others i have the strange problem that the charging cable is "falling" from the connector on my note 2.
i have found a solution with replacement cable from HAMA and it was great cause the connector is about 1 mm longer and keep "stuck" inside the not 2
the problem is that i have found out the charging is slow...
i thought its my imagination but i take the charger on my bag to work and yesterday night went to sleep with about 12% battery and connecting to the charger i was sure that in the morning the battery will be full....
i woke up 3.5 hours later to work and ... ooops only 74% battery...
i decided that it has to be the cable so i took with me the original cable and here i am at work connecting the charger and in about few minutes i got 80% battery.
so i guess we have to find a thick cable cause "having" 2A charging is depend also on the cable thickness ...
I had similar problems here : http://forum.xda-developers.com/showthread.php?t=2015459
It looks like all cables are not created equal.
I doubt it was the gauge. It probably was that the pins weren't fully contacting because they weren't aligned right or something. It doesn't take much wire to deliver 10 watts.
I don't have problems with charging, but the cable fit is very loose and can be very easily disconnected. I thought it's just me.
I too have noticed shower charge rate on other chargers/cables. I used one of my old palm pre (yes remember those) chargers and cable to charge my note2 one day and it took forever. Not sure what the reading is buti believe it was a 1.5a charger witha thinner wire.
I am using the stock Samsung note 2 charger/cable my phone came with and it is much faster. On the cable it says 23AWGx2. Not sure what the x2 is but i would look for the same 23 AWG.
I also have an I go charger with the interchangeable tips. I believe it is a 2a charger. Not sure about the wire gauge but it is thicker. It also charges fast like the stock one.
I'm guessing the smaller gauge wire loses some charge through the extra heat it is generating to push the2a required. I did notice on the palm pre charger that it was hot.
I have noticed on all my chargers besides the stock one I have to push much harder to plug it in. I hope its not damaging the connector on the phone.
Sent from my SPH-L900 using xda app-developers app
flaring afro said:
I doubt it was the gauge. It probably was that the pins weren't fully contacting because they weren't aligned right or something. It doesn't take much wire to deliver 10 watts.
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Click to collapse
The important thing is amperes, not watts. And 2A is not that small.
I tried using the following site to calculate the voltage drop : h ttp://genuinedealz.com/voltage-drop.html. And with 4ft of 28AWG cable at 2A, the voltage drop is 1V. And 5V-1V=4V is not enough to completely charge li-ion batteries. Switch to 20AWG and the voltage drop becomes a more reasonable 0.16V.
Also, voltage drop is proportional to length, so longer cables must be thicker to compensate.

Cheotech Fast Wiresless Charger

I just received my review unit of the Cheotech Fast Wireless Charger. This charger costs 34 dollars on amazon. It supports auto-dimming so you don't have to worry about a glowing puck at night.
Just wanted to update this post with a $8 off code. Here is the code number: FOX9T3SJ Enjoy!
MOD Edit: Referral links removed
good review , and no angry pitch
I got the white version of this CHOETECH Fast Wireless Charger at Amazon. I use it with the new Samsung Galaxy Note 5 & the fast charging is working great. This can be purchased with the pad on it's own or bundled with a fast charging wall adapter.
Link: http://www.amazon.com/gp/product/B015O4EZI4/
How's it work with a case? I have a defender and curious if it'll work
Sent from my SAMSUNG-SM-N920A using Tapatalk
akmzero said:
How's it work with a case? I have a defender and curious if it'll work
Sent from my SAMSUNG-SM-N920A using Tapatalk
Click to expand...
Click to collapse
I have no worry charging it with my case. But I heard that too thick a case may block the wireless charging.
I am looking forward to getting mine here and testing it out compared to some other chargers.
Sent from my iPhone using Tapatalk
The Best part was When I compared the old model and new model with Fast Charging side by side.
check it out.
https://youtu.be/HLqaMWDMEe4
I have bought this Choetech Fast Wireless Charger yesterday. I am happy with its fast charging and LED Light Charging Status indicator.
Can the lights be shut off completely? I'd like to have one of these on my night stand but wouldn't want any light.
I received my charger from Choetech today and left my review on amazon, I have copied it here as well for the folks at XDA.
Feel free to ask any questions, I will try to answer them as best I can.
First, this is an amazing charger. Choetech always makes good products.
I received this in 2 days and set about testing it.
I was going to make a video showing off this thing fast charging on a Samsung Galaxy Note 5 but I see that there are already 2 excellent videos up showing that. So instead I will show you the things they did not highlight as much.
OK, the quick charge 2.0 wall plug you can get with this is the best one I have ever tried. Just like the other Qualcomm certified chargers, you will get the self adjusting voltages (12v-9v-5v) to give you a super fast charge. The extra you get with this Choetech quick charge 2.0 adapter is the USB port on it is reversible! This is the first charger I have seen with this and I now think everything should have this.
Ok now to the real reason you are reading this. The charging puck itself is a nice clean looking puck.
It is defiantly thicker than the cheapo ones you get for a few dollars. It has some heft to it making it feel more premium.
It has rubber top and bottom to keep both the charger from slipping on your desk or the phone from slipping on top the charger.
It will most defiantly charge your Note 5 or other Samsung devices quickly.
It will also charge your older devices as well. I tested it on a few LG phones in addition to the Note 5.
I noticed no abnormal warmth from the charger or any of the phones I tested this with. This is a very welcome thing as most of my other qi chargers do have heat issues.
One final thing, I tested this charger on my moto 360 and it charged it flawlessly. Most qi chargers fail here and will overheat this watch, this one did not and it charged my moto 360 from 19% to full in about 35 minutes. that is about 15 minutes faster than the stock charger does.
I have attached some pictures and may upload a video in a day or 2 after I have some more time to test this gem out.
I received this product in exchange for an honest review, this does not affect my opinion of this product.
My Review
Hey guys and gals, I received my CHOETECH Fast Wireless Charger a few days ago and wanted to add my review to this thread.
It starts off with nice packaging with color graphics on the front and information about the charger on the back. Once you open the package up, the fast wireless charging puck and included USB cable are both neatly and safely inside. The fast wireless charging puck has a piece of protective plastic on it which you will need to remove before charging.
The wireless charging puck itself is very nice. It's small and compact, has a nice gloss finish to it and has a rubber ring around it so your phone won't slide off of it while charging. The bottom also has a rubber ring around it so the puck won't slide around on whatever surface you put it on. I know this is pretty standard fare at this stage in the game, but very nice touches for a very fairly priced fast wireless charger.
How about performance? This is the most important aspect, right? To put it bluntly, it's fantastic. Compared to the Samsung branded counterpart of this, it performs admirably to say the least. And at basically half the price. I have consistently been getting about 8% charge every 10 minutes. Very respectable and performs up to spec as far as I can tell. If my math is correct, you are looking at about a little over 2 hours to charge from 0-100%.
I've also noticed that the charger has a fairly large sweet spot. You don't have to be perfect with putting your phone on there, it will charge off center. Another nice feature is the auto dimming. In bright light, the charger has green lights that glow while you are charging. The lights turn blue when you are fully charged. In low light, the lights get much dimmer. In the dark, the lights turn off completely. This is an awesome feature for people who are sensitive to lights while trying to sleep.
Overall, I highly recommend this charger. It charges fast (as advertised) and is sold at a great price. It is also well built and the auto dimming feature is very welcomed and a great addition that I didn't expect at this price point.
Yes, charge light was shut off completely.
Azlum said:
Can the lights be shut off completely? I'd like to have one of these on my night stand but wouldn't want any light.
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Click to collapse
I wacthed a video on Choetech official Facebook. It showed the light was shut off completely on dark environment. I also admire this feature very much and wanna have a try.:good:
Azlum said:
Can the lights be shut off completely? I'd like to have one of these on my night stand but wouldn't want any light.
Click to expand...
Click to collapse
The light goes off automatically in the dark. Perfect one for bedside use.
Got mine today in black. Very sleek and surprisingly dense. Short video here https://www.youtube.com/watch?v=6wMc2FBoOuY
Fast charging wirelessly is super convenient, can't say enough good things about. I know the OEM samsung fast charger has vents on the bottom because of heating. Wondering how well this will dissipate heat in the long run.
I charge over night. I would assume this would stop charging once full right? So its safe to leave it on the pad till morning... I normally unplug in the morning
How is it with placement? I can't ever seem to get phone to charge and stay charging even on 3 coil chargers
Seems to connect easily as long as you place it near the center. In the video I posted I remove and connect a few times,each time it registered fine without having to adjust placements.
Hi All,
I also just received the Choetech Quick Charger and absolutely love it! My initial impression is that the build quality is superb. It has some heft to it and seems to be built to last. The top and bottom have rubber grip zones to prevent the charger and phone from sliding around on my desk. I also like how the LED shuts off when the room is dark (great for sleeping) as I always hate bright lights at night.
As other reviewers have mentioned, it can charge the phone from 0-100% in about 2 hours which is about an hour faster then the normal wireless chargers. There's no way I would recommend buying the Samsung quick charge variant over this version as it is half the cost with the same functionality.
I haven't had any issues with the charger detecting my phone using the Spigen Liquid Crystal case and would assume that any slim fit case would be just fine.
Overall, I'm extremely satisfied with the product and would recommend it! Please reach out to me if you have questions. I'll do my best to answer them in a timely manor.
---------- Post added at 11:00 AM ---------- Previous post was at 10:58 AM ----------
Mayonesa said:
I charge over night. I would assume this would stop charging once full right? So its safe to leave it on the pad till morning... I normally unplug in the morning
Click to expand...
Click to collapse
I charged mine overnight and woke up to a full charge. The phone wasn't hot (and neither was the wireless charger) so I'd say that it is safe to use overnight.
I received mine today and I can actually charge my Note 5 with the flap opened and pinned back on my folio case. Here's the case I have for reference: http://www.amazon.com/gp/product/B010MWJG0U?psc=1&redirect=true&ref_=oh_aui_detailpage_o02_s00
When the phone is 100% charged does the charger receive the charging complete signal from the Note 5 and cut the power output from the Choetech charger? Or is the charger at 10W all the time?

Tronsmart TS-CC4PC Quick Charge 4 Port Car Charger Review

So, this is my review of the Tronsmart TS-CC4PC Car Charger. Disclosure being, Tronsmart was looking for reviewers for their product, and driving a tractor trailer, I am in a unique position to give products a bit of a more thorough testing than most people can, due to the large amount of miles I drive every week. Tronsmart agreed and sent me a unit directly at no cost to me. For reference, the cost currently on amazon is 19.99$ fulfilled by amazon.
http://www.amazon.com/gp/product/B00ZF7XLJU?keywords=tronsmart&qid=1446321299&ref_=sr_1_2&sr=8-2
Lets start off with what it comes with, it does come in a nice box, you get a small Volt IQ booklet, a user manual, and a USB cable. The USB cable is a nice touch, as one can never have to many USB cables. The Volt IQ booklet just states that Volt IQ selects the fastest charging speed for the device you plug in. And the manual is, well, it's a manual, it's there if you wish to take a peek at it. I personally did not look at the manual for a car charger!
Size wise, it's about the length of my finger, the knife in the picture is just a 3inch blade, 5inch closed utility knife that I use. The charger itself is right around 3.5inches x 2inches. Not the smallest, as it is a 4 port after all. But it fits nicely into my personal vehicle, and my tractor.
Probably one of the reason you'll buy this charger is for the Quick Charge 2.0. The quick charge port is denoted by blue in the ports, similar to how USB 3.0 is coming off the motherboard of your pc. If you own a Note 5 like myself, your phone can take advantage of it. And yes, it is fast. Basically a full charge in a bit over an hour. I generally leave my phone plugged in almost 24/5 while I am in my truck, for the past couple of weeks, I have not been doing that, I've been letting it sit unplugged, and then plugging it in as it drains to various levels to test the capability of the fast charging. You can literally watch the % go up when charging if you feel the need, but either way it's fast......Please remember as well, from my knowledge some USB cables won't use the quick charge, the tronsmart cable that comes with it does, and the 2 other cables I had that I tested it did. But some older/cheaper cables may not use the fast charging.
Now, this is the 4 port version. I actually specifically requested this model, as driving a truck I have tons of electronics plugged in at various times throughout the day/night. My charger is also plugged in permanently in my truck, with cords being swapped out quite often throughout the day as I go in/out, and into my sleeper and back to my cab. So far it's handled everything I've thrown at it, I did test it with 4 products plugged in, and it worked great, and charged fine although my testing with this was limited, as generally I have 3 plugged in(bluetooth headset, note 5, nexus 9), and with those being plugged in multiple times a day, it still, works perfectly as expected. I've often had problems with other car chargers due to low power output when it comes to my nexus 9 tablet, and my note 5, I often times load up the hotspot on my note 5 and stream netflix on my nexus 9, while browsing on my note, and this charger had no problems keeping both charged, and I cannot tell you how irritating it was to be watching netflix, and happen to notice the battery on my nexus 9 would be down to 10% just from streaming. This was one of my main concerns with the charger and figured if it failed, I wouldn't even be able to recommend this charger, luckily it handled it without issue, and even continued to charge my nexus 9/note 5 while streaming, which the cheap chargers will not do with a nexus 9 with it's large screen.
Another problem I have with car chargers in a truck, is build quality. A serious issue is with them popping loose out of my cigarette outlets due to poor roads. The Tronsmart actually is built quite well. It's not heavy by any means, although a bit heavier than the cheap chargers you'll get from gas stations or truck stops, it feels solid in your hands. The side metal pieces actually have a bit of resistance when pushed in, which helps keep it planted in the outlet. Generally I've noticed on the cheaper chargers they are just simply a piece of metal, this charger actually has almost a 'springy' feel to it, they also give a satisfying 'click' when you push them in with your finger and release . I don't expect any build quality issues anytime soon with this charger.
I was also concerned about heat issues with having a 4 port, as often times sitting in my truck, in the sun, will be quite hard on the electronics. I didn't notice any excess heat with this charger at all, and while it's certainly almost winter, so the temps in the 90+ are gone, with the sun beating down on the truck, it gets warm fast in there.
And thank you Tronsmart for not including an LED light on this unit. I cannot stress this enough, it's so easy to simply plug your phone, or something into a car charger to verify it's working, I don't need a bright led light to shine into my eyes to tell me it's on, I can plug it in and test it in 3 seconds myself. Such a little thing, but it's welcome in my eyes.
The one issue I did have, was with the provided USB cable. It is a quick charge cable, but it's still a little on the cheap side. The USB cable connector for my note 5 was starting to bend occasionally, my guess is this is due to the abuse, and fairly constant unplugging/replugging into my phone, getting smacked accidently as I move around in my truck, etc. I've simply bent the connector back and haven't had any issues, that said, should it bend to far, longevity of the cord that comes with the charger may be an issue depending on how much abuse you put it through, which for me, is far more than the average person. And of course, the USB cable is just a nice addition to your purchase, most of us have plenty of these lying around already, and it's nice of Tronsmart to add another to my collection, even if it's not the highest quality.
For reference the vehicle in the picture it's installed in is a 2014 Freightliner Cascadia if anyone is wondering why there is so much room, and it looks far different from any other vehicles dash setup, it is a 20k lbs tractor
At the end of the day, for 20$ currently on amazon, I find it hard to think you could ask for much more out of this charger, the fast charge works, the other ports work well, the power output is high enough to keep whatever you need charged, even while in use. It holds in your outlet well, and it doesn't have any annoying LED light lighting up your vehicle in the middle of the night. I actually hope to grab myself a 2nd, or even a 3rd to place into my sleeper of my truck instead of dealing with the cheap one I currently have back there and for my personal vehicle. I can't say I've ever owned a non-cheap one before this, but let me tell you, I should have bought one years ago instead of wasting my time with the cheap walmart/gas station ones.......And if there are any questions, feel free to ask as I'll subscribe to the thread.
TL;DR If you need a car charger with 4 ports and a fast charge port, this charger works well, and I really don't see how you could be disappointed with your purchase of this charger.
Nice review. Thanks.
ucsdsig13 said:
Nice review. Thanks.
Click to expand...
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You're welcome!
Good job. Nice review. the car charger looks very nice
I bought one of these but it does not stay tight in my either of my 12V sockets in my car and keeps coming out a little bit and stops charging. I did email Tronsmart and they are sending me a replacement. Maybe the one I got was defective. It does charge fast when it stays in.

Heat and Extended Battery Case

I purchased the Zerolemon battery case for the Note 9. The updated one for $40 on Amazon. Mostly with one use in mind (due to its large size making it not practical for daily use for me), and that's for when I use the phone as a hot spot to connect my Chromebook Pro to my Verizon LTE connection. I purchased the AccuBattery app to make an effort to only charge my phone up to 80% to avoid heat and stressing the battery. An alarm will sound when you hit 80% and I disconnect the cord. This will potentially double the longevity of the battery. So Under normal operation without the battery case the Note 9 is at 80 degrees Fahrenheit (no hot spot). With the battery case charging the phone it's running at 105 degrees while hot spotting. The app registers this as in the "red zone". That can't be good for the battery. Without the battery case running the hot spot the temperature is at 89 to 99 degrees.. still in the green zone and the phone only feels warm not hot like with the case on.
I don't recall the battery running this hot when I used extended batteries on my LG V20 to run the hot spot Wifi. When I picked up the phone it wasn't nearly this hot to the touch like when using the battery case. When I used an external power bank like my Anker 10 mAh PowerCore+ 3.0 quick charge, no heat issues either.
If recharging the battery causes heat in the battery case's own battery is the close proximity to the Note 9's internal battery likely to cause more damage than simply letting the battery run down to the recommended 30% (or when heat starts to pick up on the app) without a battery case? Then use the battery case to recharge when the phone is no longer in use?
I think it's safe to say that recharging the battery in the battery case while running the phone in a high output/discharge function like streaming, facetime or hot spot is really detrimental to the Note 9's non removable battery. The whole environment is too heated up. When I had the user replaceable batteries on my V10 and V20 this wasn't an issue because those batteries are very inexpensive compared to the cost of replacing a Note 9 battery. Reason #234 why phones should have user replaceable batteries.
I will post the battery temps when using an external power bank that's at least six inches away from the phone so that heat is not spilling into the internal battery.
Here is a screenshot of the AccuBattery app where I monitor battery heat under the discharge tab at the bottom right. Heat is the enemy.

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