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Any tips for improving battery life?

I'm wondering if there's something I can do/change to get more time with continual use out of a full battery.
After 4 hours of web browsing, my battery is down to 40%.
I'm on cm7 7.1 with 6/30 kernel
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I have the brightness turned down really low and I've used the battery callibration app, a few times.
No problems with deep sleep- just looking to get more time from continual use.
Any ideas?

Do you run an auto-task killer app? Because if so you're trading very short term memory savings for a boat load of processor time. Ever since Froyo, and especially Gingerbread, Google made significant changes to the idle-memory allocation management and active-process management logic. All task-killers accomplish in 2.2+ is wasting processor time because 90% of the time android will immediately(depending on the app's historic use and prioritization) restart said app thinking there was some sort of critical failure. (you can check for your self, get the app "System info pro", and preform a kill. For the next 10-15 minutes you'll watch nearly all of the killed processes return to life, and re-assume their use of active/idle ram.
Example: You have 20% ram available, not idle mind you, and the app you've chosen to run needs 35%. First android will prioritize and organize all of the idle apps(which reside in idle ram, kind of like a really big stepping stone between oblivion and active status), and start purging from the bottom-up. Continuing till there's enough free'd memory to launch. Android also has the option of clearing/shrinking assets as a last resort before playing the guessing game as to which active apps aren't important. I don't exactly know what conditions need to be met in order for an app to achieve active(more-protected) status, rather than idle, but it's fairly good at figuring it out, or android wouldn't be so godly at multi-tasking.
A little long-winded comment, but I don't prefer giving advice and backing it up with because I said so logic.
TL;DR For 2.2+ don't use Auto-task killers, they gorge on your precious mA/hr's. Use something like "System info pro" or any comparable app to singly kill, or a pre-setup batch kill, apps as you experience issues.
Other than that, my only advice for battery life would be to not have apps you don't regularly use installed. If they're not installed they can't second-hand or tertiary-hand waste power.
In all reality, most if not all further battery/CPU efficiency increases will come from the hard work put in by Dalingrin/verygreen/murdok to increase hardware optimization for our version of android/kernel. (I know there's more key players, just can't think of them off hand)

Woot- I'm not using a task killer app, but thanks anyway for the info!
It sounds like people.are getting better results that I am with heavier use (videos, gaming, etc.) , so I'm trying to figure out where I'm going wrong.
Are there any settings that I can change that might help?
I'm more familiar with iPhone battery saving settings- where themes and push email eat lots of battery.
Is that the same case with android?
How much do widgets impact battery life? I don't think I have alot- but maybe there are some that eat more battery than others?

I know your first post said while web browsing but when you aren't using data you can turn off wifi to save power. Like when playing a game or watching a video from emmc/sd.

woot1524 said:
Other than that, my only advice for battery life would be to not have apps you don't regularly use installed. If they're not installed they can't second-hand or tertiary-hand waste power
Click to expand...
Click to collapse
Is there a way to find out which apps do this?

Ram usage

Hey everyone.
I just got my 4x HD and i was wondering why i always have around 70% ram used on idle.
I checked in task manager and there was for around 200mb of services and apps running max, can't find where the other 400mb went.
Anyone knows if this is normal? How much ram does your phone use on average?

I agree with 700mb ram already used. But doesnt lag the phone though.

AW: Ram usage
its better when more ram is used. all the apps u used are stored in ram for quicker app start when run the app again. in other words: phone is faster when more ram is used. only if u hit the 1gb limit the phone would lag
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gordon0001 said:
its better when more ram is used. all the apps u used are stored in ram for quicker app start when run the app again. in other words: phone is faster when more ram is used. only if u hit the 1gb limit the phone would lag
Gesendet von meinem LG-P880 mit Tapatalk 2
Click to expand...
Click to collapse
thats true, but i too have ram problem in my o4x,
it starts lagging and freezing after some time if memory is not cleared by any task manager. and at extreme it restarts the phone.
i haven't installed that much apps yet, i installed more apps in my HTC Explorer and that phone never did things like this but this phone has double ram and still doing strange things.
and i installed swapper to solve the problem but now i'm stuck on boot logo, any help appreciated.
and any help on my bricked phone is also appreciated at my post here, http://forum.xda-developers.com/showthread.php?t=2192894

still, my phone uses 800Megs of RAM and constant lag.

fyi every time someone complains that their Android phone is using a lot of RAM an angel loses its wings.

AlderCass said:
fyi every time someone complains that their Android phone is using a lot of RAM an angel loses its wings.
Click to expand...
Click to collapse
but.. but.. but how will the games work smooth if there's only 100megs ram free?
I understand that system/UI works faster when everything is loaded in ram... but i don't like apps in background sucking my battery. I've seen this clearly in Battery Monitor. When ram is clear it uses about 25mW (on idle), with stuff in background it's closer to 100mW or more... I don't like my phone eating battery 4 times faster on idle that it should.

_MiseryMachine_ said:
but.. but.. but how will the games work smooth if there's only 100megs ram free?
I understand that system/UI works faster when everything is loaded in ram... but i don't like apps in background sucking my battery. I've seen this clearly in Battery Monitor. When ram is clear it uses about 25mW (on idle), with stuff in background it's closer to 100mW or more... I don't like my phone eating battery 4 times faster on idle that it should.
Click to expand...
Click to collapse
Again, this isn't Windows, it's Android. Free RAM is wasted RAM. If it has only 100Mb free and you launch a heavy game, it'll promptly free the needed RAM by offloading the least used stuff it still has on RAM.
On the other hand, if you call that program you only use once a day, it's probably still in your RAM, and will open as if you've only just used it (well, almost).
The used RAM isn't necessarily active, so not all the apps stored there are sucking battery. Your test results are accurate, but your conclusions are fallacious: yes, there's less battery usage when the RAM is clearest, but, as they say, "you've thrown out the baby with the bathwater", i.e. when unloading ALL apps, you also unloaded the ones that were consuming battery. On the other hand, you've also thrown out stuff that were just kept in memory, but weren't active.
The other problem with your approach is that, after you unload ALL apps, the most troublesome ones will probably reload themselves back into RAM. So, even if right after freeing RAM you reduce your battery usage, a few minutes later it will be back to the same.
What you should do is get a program like BetterBateryStats and find out what's actually sucking your battery. When it does, you have a few alternatives:
- uninstall apps that are sucking your battery but you just don't need;
- greenify some of the apps that you do need, just not all the time;
- freeze some apps (with Titanium Backup) that you don't use but can't uninstall.

i tend to disagree with people saying free ram is wasted ram and preloading apps in ram is good and that for this simple reason.
everytime you start a app that is not preloaded (it can only preload so many apps) it has to use cpu time to unload it then load the next app resulting in extra cpu usage = less battery time.
many people complain about battery life except me.
and i really manage my phones resources all day long and have nsane results noone else seems to get.
i have over 5 hours 30 min screen on time (me browsing watching youtube using whatsapp and so on.) and have over 630 mb ram free.
my total stanby time on lght use is 5 days with 2 hours 30 min screen on time.
i would send screenshots as proof but for some reason the lg 4x hd bluetooth wont install on windows 7 x64.
but really since i starte to actively manage my phone the battery lasts longer and i never had a stutter or anything.
and as a sidenote my phone is stil unrooted and stock v10h so with root i could prevent even mre from starting up and have even more free ram and better results.
and yes the poster above me is right some apps will reload themselves so IF you use a task killed prevent it from killing tasks that start themselves up again.
like google partner setup , media and more google stuff.

hutjeflut said:
i tend to disagree with people saying free ram is wasted ram and preloading apps in ram is good and that for this simple reason.
everytime you start a app that is not preloaded (it can only preload so many apps) it has to use cpu time to unload it then load the next app resulting in extra cpu usage = less battery time.
many people complain about battery life except me.
and i really manage my phones resources all day long and have nsane results noone else seems to get.
i have over 5 hours 30 min screen on time (me browsing watching youtube using whatsapp and so on.) and have over 630 mb ram free.
my total stanby time on lght use is 5 days with 2 hours 30 min screen on time.
i would send screenshots as proof but for some reason the lg 4x hd bluetooth wont install on windows 7 x64.
but really since i starte to actively manage my phone the battery lasts longer and i never had a stutter or anything.
and as a sidenote my phone is stil unrooted and stock v10h so with root i could prevent even mre from starting up and have even more free ram and better results.
and yes the poster above me is right some apps will reload themselves so IF you use a task killed prevent it from killing tasks that start themselves up again.
like google partner setup , media and more google stuff.
Click to expand...
Click to collapse
I had that problem when I installed the first leaked V20A, now with the official V20A EUR_XXX bluetooth is working fine, faster tranfears than with ICS.

help
I have problems, too. My o4x is working about 2.5 years but im very angry because of the ram usage problem. The ram is always %70-80. And the phone is very very very... slow. If the cpu is works %80, what can i do ? The battery is finishing very early. I dont wanna new phone. Im not rich. I dont want to buy a new iPhone. Everyone say "The iPhone (ios) is the best. Android is the worst. Bla bla bla.. " And I believe this... PLEASE HELP ME (( :crying:

What could cause EXTREME lag? (30-second delays)

My Moto X randomly started lagging heavily. It's unbearable.
It's not just a little bit here and there, the entire system is EXTREMELY LAGGY. It takes 30 seconds for the device to register a touch or perform an action.
I have root + stock ROM + gravitybox + very minimal third-party apps.
What the hell is going on?

Download an app that keeps track of CPU and RAM usage for each app. One of your apps may be keeping one or both of those at close to 100% usage and slowing it way down.
Sent from my XT1049 using Tapatalk

DonDizzurp said:
My Moto X randomly started lagging heavily. It's unbearable.
It's not just a little bit here and there, the entire system is EXTREMELY LAGGY. It takes 30 seconds for the device to register a touch or perform an action.
I have root + stock ROM + gravitybox + very minimal third-party apps.
What the hell is going on?
Click to expand...
Click to collapse
Many things could cause it. Backgrounded app crashing over and over (loop), malware (very unlikely), weird software conflicts, perhaps you froze an app that the system is trying to wake non stop, etc. Might be faster just to backup, RSDlite and restore. Titanium Backup and Ultimate Backup make it very easy with batch backups/restore. 2 key inputs backs up all your apps and 2 restores them lol. It's ridiculously easy
Also make sure you're not running battery saving mode, I imagine that caps your max clock speed to a lower value although it shouldn't cause THAT big of a performance hit.
Apps like BetterBattery stats or GSAM can also show you what's hammering your battery in the background and occupying your CPU cycles. I would take a quick peak at those tools first before I decide how to approach the situation.
What's happening is some app or software conflict is polling (sending commands to) your CPU non stop so when you interact with your phone each key press/swipe/action is put into what is now a long queue for the CPU to process it. Kind of like a lineup at a coffee shop in the morning, you wanna get in and out fast but they gotta serve the people in front of you first.

scorpion667 said:
Many things could cause it. Backgrounded app crashing over and over (loop), malware (very unlikely), weird software conflicts, perhaps you froze an app that the system is trying to wake non stop, etc. Might be faster just to backup, RSDlite and restore. Titanium Backup and Ultimate Backup make it very easy with batch backups/restore. 2 key inputs backs up all your apps and 2 restores them lol. It's ridiculously easy
Also make sure you're not running battery saving mode, I imagine that caps your max clock speed to a lower value although it shouldn't cause THAT big of a performance hit.
Apps like BetterBattery stats or GSAM can also show you what's hammering your battery in the background and occupying your CPU cycles. I would take a quick peak at those tools first before I decide how to approach the situation.
What's happening is some app or software conflict is polling (sending commands to) your CPU non stop so when you interact with your phone each key press/swipe/action is put into what is now a long queue for the CPU to process it. Kind of like a lineup at a coffee shop in the morning, you wanna get in and out fast but they gotta serve the people in front of you first.
Click to expand...
Click to collapse
I've frozen a bunch of apps and it's been fine for months.
I also turned on CPU updates from developer options to see if anything is bogging it down. I don't see anything in battery stats either.
I wiped cache and dalvik cache and now it's fine. I've never had something like cache build-up cause this much of a problem before. Weird.

Optimization suddenly dropped from 100% to 90%

Hi guys, any idea why might this happen? After a few days of usage, the performance score dropped from 100/100 to 85 and then 90/100. Still rated Excellent, but this happened suddenly. I installed two or three games, but even after deleting them, it did not go back to 100/100.
So, any idea?
Thanks a lot!

Why do you even care about that?

They adjusted the scale to trick you into turning on the built-in Anti Virus

The score is a scam.
My favorite(sarcasm) function in all these kinds of apps is the cache clearing. Cache helps your device.
And the memory clearers are wose than useless, they cost battery life.

Oooh ook. I thought it was important, and was related to the overall performance. If you say it ia not...then f..k it!

leoking3 said:
Oooh ook. I thought it was important, and was related to the overall performance. If you say it ia not...then f..k it!
Click to expand...
Click to collapse
When you see it less than a 100 or anywhere in the 80% range just press the "optimize now" button at the bottom. That will clear up whatever it needs to clear up and bring it back up to 100%.
It will close apps in the background, free up ram space, delete temp files (it just deleted almost 1GB of temp files, probably from web browsing) and some other things.
One thing I'm glad it does is delete those temp files because by now I would probably have 3GB or more of unwanted files clogging up me phone. So I'd say from time to time just give that optimize button a press

Overheating

I bought my first Samsung phone in over 10 years, the Samsung S20 FE 4G with the Snapdragon chipset.
To my surprise the device is heating up very quickly while in use:
With light use, like messaging apps the CPU stays around 37 to 49°C,
While gaming it stays around 47 to 50°C+ (I believe the 60°C was the biggest temperature spike).
I've heard people saying that transferring data from your older phone via Smart Switch may cause this heating issue, but I don't think that should be a issue.
Lastly, I have no clue on how weather affects the phone's temperature.
Despite being winter, we're having temperatures around 40°C where I live, but even when the night comes and the temperature drops to around 20°C (right now it's 26°C and the CPU temperature is around 40°C, while I'm listening to music via Bluetooth and (re)writing this post) my phone still heats up (just not as much as in the rest of the day).
I think it's worth mentioning that the CPU temperature is also changing quickly, I don't know if that's normal or not but for instance, when I switch from one app to another, if the app I'm using to measure the device temperature (CPU Monitor) is to be believed, the temperature jumps some 2 to 5°C. It usually comes back down again, but I really don't know if that's normal.
I went to the Samsung store today, they checked, did some tests, and said that the temperature was at normal range, but they said that the temperature while switching between apps was a little strange.
They also said that their system detected a temperature spike caused by Fine Lock on the day that I bought the phone, which I find weird since it's only a launcher to the Good Lock apps, but nevertheless they advised me to uninstall it and keep monitoring the temperature for a few more days, and that if the device gets too hot (over 60°C), that I should go back again and ask for a replacement.
Anyway, should I give some time, should I worry about it, should I take it back to the store?

I have the same model as you and I haven't experienced any of the symptoms you are talking about. If I were you I'd return it and get another one. At least then you can be sure if it is normal or a defective device.

SmartSwitch isn't that smart especially between different OS's/devices.
I think you better start from the beginning...
Backup your contacts etc to the PC using cut/copy plus at least one other hdd.
Factory reset. Reload from scratch. Run factory loaded versions; do not update any at first.
Avoid enabling any power management at least at first.
See what you got and go from there.
It's likely not hardware at all but a bad configuration. Common with Samsungs and correctable.

Orcam said:
I have the same model as you and I haven't experienced any of the symptoms you are talking about. If I were you I'd return it and get another one. At least then you can be sure if it is normal or a defective device.
Click to expand...
Click to collapse
Thank you. I'm thinking about doing it. I've talked to some S20 FE owners who live in my country (which is a very hot country) and they said that the device temperatures are basically the same as theirs, but at the same time I'm still worried about it's long term effects since I plan to keep this phone for at least two years.
blackhawk said:
SmartSwitch isn't that smart especially between different OS's/devices.
I think you better start from the beginning...
Backup your contacts etc to the PC using cut/copy plus at least one other hdd.
Factory reset. Reload from scratch. Run factory loaded versions; do not update any at first.
Avoid enabling any power management at least at first.
See what you got and go from there.
It's likely not hardware at all but a bad configuration. Common with Samsungs and correctable.
Click to expand...
Click to collapse
Thank you, I did what you told me (except for flashing the factory stock ROM since I couldn't find it), I've only restored the apps using the Google backup, but didn't restore my settings. I've also did a mild debloat of the phone (removed Bixby and the Facebook apps) and while using the phone to browse through social media doesn't heat the phone as much as it used to, it still heats up more or less the same during gaming, so I'm guessing that might be normal.

Depending on how CPU cycle intensive the game is, it could normally use a fair amount of power.
Running background apps can make it noticeable worse though.
Try temporarily disabling Google play Services and see if that helps.

blackhawk said:
Depending on how CPU cycle intensive the game is, it could normally use a fair amount of power.
Running background apps can make it noticeable worse though.
Try temporarily disabling Google play Services and see if that helps.
Click to expand...
Click to collapse
It's Honking Impact 3rd, it's not intensive like PUBG or something like that, but can be intensive depending on the game mode. It runs at 53°C max. I found out that one of the apps that I was using to measure the temperature apparently only shows the temperature of the hottest CPU core, that's why the temperature sometimes shoot up to 60°C whenever I took a screenshot for example, and then came back down to around 50°C.
But I'll try disabling Play Services and playing again.
Do you know if those temperatures are safe btw? Around 50°C while I'm gaming.
The battery's temperature doesn't go past 40°C, in fact I don't even think I've ever seen it getting to 40°C.
Anyway, thank you very much.

You're welcome. The Farenheit is scaled better for real world use.
140F is well within tolerance for the CPU/mobo as long as the battery doesn't get hotter than that. I don't let my battery go beyond 103F.
The CPU/mobo can handle up to probably 165F but it's best never to push it that hot as auto thermal shutdown doesn't always work in time to save the components that are running hot and have a sudden additional power usage spike.
Really the phone shouldn't feel hot... it's killing the battery too. Track them down.
If it feels warm when using the browser, something(s) are running in the background driving it up.
Any cloud apps, including Google backup Transport, Framework and Google Firebase.
Ditch any trashware apps like WhatsApp, Twitter, Instagram etc.
I'm using my 10+ in a case at a 75F ambient air temp browsing with a CPU temp of 89F right now. It is stock but heavily optimized.

blackhawk said:
You're welcome. The Farenheit is scaled better for real world use.
140F is well within tolerance for the CPU/mobo as long as the battery doesn't get hotter than that. I don't let my battery go beyond 103F.
The CPU/mobo can handle up to probably 165F but it's best never to push it that hot as auto thermal shutdown doesn't always work in time to save the components that are running hot and have a sudden additional power usage spike.
Really the phone shouldn't feel hot... it's killing the battery too. Track them down.
If it feels warm when using the browser, something(s) are running in the background driving it up.
Any cloud apps, including Google backup Transport, Framework and Google Firebase.
Ditch any trashware apps like WhatsApp, Twitter, Instagram etc.
I'm using my 10+ in a case at a 75F ambient air temp browsing with a CPU temp of 89F right now. It is stock but heavily optimized.
Click to expand...
Click to collapse
The phone doesn't feel hot, unless I'm playing a game, depending on the game it gets somewhat hot.
It's been colder in my city these past two days, but tomorrow we'll have a temperature that's closer to normal. If the phone manages to stay in an acceptable temperature range I'll keep it, if not, I'll return it to the store and see what I can get done.
My old phone didn't have a plastic back, so feeling the phone warm is a new thing for me.
Most Google apps are disabled, I only use WhatsApp to talk to my family, I have Instagram installed but I don't even remember when it was the last time I've used it (I put it on deep sleep also).
Thank you very much once again.

Using power management can cause erratic behavior and sometimes increased power usage especially if set globally.
Developer options>standby apps, all buckets should show as active otherwise power management is running.

blackhawk said:
Using power management can cause erratic behavior and sometimes increased power usage especially if set globally.
Developer options>standby apps, all buckets should show as active otherwise power management is running.
Click to expand...
Click to collapse
With Power Management you mean the Background Usage Limits from the Device Care app?

furquim97 said:
With Power Management you mean the Background Usage Limits from the Device Care app?
Click to expand...
Click to collapse
Yeap. I have a 10+ running on Pie.
Your may get different results but it's a known source of instability and trouble.
This is how mine is configured.

blackhawk said:
Yeap. I have a 10+ running on Pie.
Your may get different results but it's a known source of instability and trouble.
This is how mine is configured.
Click to expand...
Click to collapse
I'll try it. Thank you once again.

blackhawk said:
Yeap. I have a 10+ running on Pie.
Your may get different results but it's a known source of instability and trouble.
This is how mine is configured.
Click to expand...
Click to collapse
I did it but now all my apps under Standby Apps are set as "Active" and I can't change it. Won't this consume more battery?

furquim97 said:
I'll try it. Thank you once again.
Click to expand...
Click to collapse
Once you do that you need to track down the trouble makers and deal with each on a case by case basis. Sometimes simply cleaning the system memory in Device Care can work wonders. Keep open apps to a minimum.
Here's the old version of Device Care. It uses 360° which cleans very well but is CCP junk.
To safely use it use Karma Firewall* to block its internet access. It will still run normally.
Before uninstalling your current version use Apk Export** to make a installable copy, just in case.
*freeware, uses almost no battery
**freeware that is very useful to backup all your apps and updates for future use... ditch Playstore for reloads

blackhawk said:
Once you do that you need to track down the trouble makers and deal with each on a case by case basis. Sometimes simply cleaning the system memory in Device Care can work wonders. Keep open apps to a minimum.
Here's the old version of Device Care. It uses 360° which cleans very well but is CCP junk.
To safely use it use Karma Firewall* to block its internet access. It will still run normally.
Before uninstalling your current version use Apk Export** to make a installable copy, just in case.
*freeware, uses almost no battery
**freeware that is very useful to backup all your apps and updates for future use... ditch Playstore for reloads
Click to expand...
Click to collapse
Thanks. But I can't uninstall the current Device Care app. Is it safe to do it via adb?

furquim97 said:
I did it but now all my apps under Standby Apps are set as "Active" and I can't change it. Won't this consume more battery?
Click to expand...
Click to collapse
This is normal. Just because their bucket state is marked as active doesn't mean they are running. It simple means Android is no longer managing them by assigning a bucket state to them and so on. Google it... it sounds like a great idea but it never worked well for me in practice. Android still manages the apps with it off less the added resource burden of this system.

furquim97 said:
Thanks. But I can't uninstall the current Device Care app. Is it safe to do it via adb?
Click to expand...
Click to collapse
Sorry. You are correct.
I got rid of the updated version by doing a factory reset. You can try loading the older version by first force stopping the loaded version. It may worked... try this first.
I guess a adb edit would allow you to disable the current one. If the older one will load is another question.

blackhawk said:
This is normal. Just because their bucket state is marked as active doesn't mean they are running. It simple means Android is no longer managing them by assigning a bucket state to them and so on. Google it... it sounds like a great idea but it never worked well for me in practice. Android still manages the apps with it off less the added resource burden of this system.
Click to expand...
Click to collapse
Oh, I get it. Thanks.
blackhawk said:
Sorry. You are correct.
I got rid of the updated version by doing a factory reset. You can try loading the older version by first force stopping the loaded version. It may worked... try this first.
I guess a adb edit would allow you to disable the current one. If the older one will load is another question.
Click to expand...
Click to collapse
I'll see what I can do.
I'll also test the phone again tomorrow when the weather in my city will return to normal. If everything goes well I'll keep the phone, if not I'll have to take it to the store and see what they offer me, a replacement, another device, I really don't know how it works in this particular store that I bought.
Anyway, thank you very much, you've been very helpful!

My 10+ was a battery guzzling hot running hog before I optimized it. It took some time and effort
Today you never guess it is that same phone.
If there's any doubts get a refund. It could be hardware, even a heat sink or pipe issue.
That said this is a commonly seen problem that has nothing to do with hardware in Samsungs.
Do some Google searches for that device and hot running issues. See what you find.

blackhawk said:
My 10+ was a battery guzzling hot running hog before I optimized it. It took some time and effort
Today you never guess it is that same phone.
If there's any doubts get a refund. It could be hardware, even a heat sink or pipe issue.
That said this is a commonly seen problem that has nothing to do with hardware in Samsungs.
Do some Google searches for that device and hot running issues. See what you find.
Click to expand...
Click to collapse
I can relate. I had a Xiaomi before this one, and the stock ROM was plagued with app killing and battery drain. I'm glad you managed to work it out, all I had to do was switch to a custom ROM.
I've tested the same game again today since the temperature has gone back to normal where I live, and while the CPU temperatures are in acceptable range, the battery temperature got to 40°C/104°F.
I did some research regarding overheating on this phone and it's always the same thing, some have it like I do, while others say the phone doesn't even warm up the palm of their hands. So I don't know if its a configuration issue or if there are a lot of defective devices out there.