01-16-2019 02:06 PM
42 12
tools
  1. cajunrph's Avatar
    Nope. Unlocked US model from Amazon. So far it's getting worse.

    What kind of battery life do you get?

    OP are you using a Exynos model? Those are known to have worse battery life than the Snapdragon models, although yours seems truly bad.

    Hopefully you figure out something that is causing the issues. My phone has had fantastic battery life, but it seems hit or miss with users of this phone. I see plenty of others who get worse battery stats than me, even having the S9+ (I'm just using the S9).
    12-06-2018 02:57 PM
  2. chanchan05's Avatar
    Hopefully you figure out something that is causing the issues. My phone has had fantastic battery life, but it seems hit or miss with users of this phone. I see plenty of others who get worse battery stats than me, even having the S9+ (I'm just using the S9).
    Actually even for an Exynos model that's horrendous. I have Exynos and I according to Accubattery I get twice that time on 3h30m screen on.
    The only reason I can see for the bad battery in his latest post is the bad signal. There's practially zero on the bar.
    12-06-2018 05:23 PM
  3. cajunrph's Avatar
    Actually even for an Exynos model that's horrendous. I have Exynos and I according to Accubattery I get twice that time on 3h30m screen on.
    The only reason I can see for the bad battery in his latest post is the bad signal. There's practially zero on the bar.
    That was in the middle of my house. Dead zone. Although I was connected to WiFi calling. I'm not sure if that makes a difference or not. Poor signal shouldn't cause that much of an issue. I've had other phones that didn't drain like this one does.
    12-06-2018 05:35 PM
  4. chanchan05's Avatar
    That was in the middle of my house. Dead zone. Although I was connected to WiFi calling. I'm not sure if that makes a difference or not. Poor signal shouldn't cause that much of an issue. I've had other phones that didn't drain like this one does.
    Actually poor signal does do A LOT of battery drain and it SHOULD cause that much of an issue. It is known to be one of the biggest causes of battery drain. This antennas are designed to try to query as much for a signal as possible especially since AFAIK you're in the US and they're killing GSM there. 4G/LTE uses A LOT of battery at low signals. Phones are supposed to let go of 4G and fall back to GSM connections in low signal cases just because of this specific battery consumption problem. If your older phones were able to fall back on GSM they won't be killing thr batteries.
    12-06-2018 05:44 PM
  5. cajunrph's Avatar
    Actually poor signal does do A LOT of battery drain and it SHOULD cause that much of an issue. It is known to be one of the biggest causes of battery drain. This antennas are designed to try to query as much for a signal as possible especially since AFAIK you're in the US and they're killing GSM there. 4G/LTE uses A LOT of battery at low signals. Phones are supposed to let go of 4G and fall back to GSM connections in low signal cases just because of this specific battery consumption problem. If your older phones were able to fall back on GSM they won't be killing thr batteries.
    iPhone 8s and now a OnePlus 6T in the same setting lasted me much longer. The iPhone would last almost to 5 or 6 pm daily. This the 6T is trending to last till after midnight.
    12-06-2018 05:51 PM
  6. chanchan05's Avatar
    iPhone 8s and now a OnePlus 6T in the same setting lasted me much longer. The iPhone would last almost to 5 or 6 pm daily. This the 6T is trending to last till after midnight.
    If those phones are falling back to GSM and there is GSM signals in the area, then they'll save battery.O know for certain iPhones still have the GSM antenna. Not so sure about the 6T, but the 6T does have versions with GSM capabilities. Have you checked your S9 if it has the correct GSM capabiltiies for your area?
    12-06-2018 05:55 PM
  7. chanchan05's Avatar
    We could also do a little experiment. You have WiFi, and your calls go through WiFi, so set the phone to airplane mode with WiFi active and see if battery gets better.
    cajunrph and Gayle Lynn like this.
    12-06-2018 05:57 PM
  8. cajunrph's Avatar
    If those phones are falling back to GSM and there is GSM signals in the area, then they'll save battery.O know for certain iPhones still have the GSM antenna. Not so sure about the 6T, but the 6T does have versions with GSM capabilities. Have you checked your S9 if it has the correct GSM capabiltiies for your area?
    The S9 is an unlocked US phone from Amazon. I checked the website and it said it will work on GSM and LTE networks of T-Mobile. I checked the specs and it does have the GSM radios that T-Mobile uses. Besides if the cell radio was draining the battery shouldn't it show up on the graph? When it did show it was around 1%. And the 6T is a world phone out lasting the S9 easily. Sitting at 41% now with 11 hours since coming off the charger.
    12-06-2018 06:23 PM
  9. chanchan05's Avatar
    The S9 is an unlocked US phone from Amazon. I checked the website and it said it will work on GSM and LTE networks of T-Mobile. I checked the specs and it does have the GSM radios that T-Mobile uses. Besides if the cell radio was draining the battery shouldn't it show up on the graph? When it did show it was around 1%. And the 6T is a world phone out lasting the S9 easily. Sitting at 41% now with 11 hours since coming off the charger.
    In any case, the 6T SHOULD outlast the S9 easily. It has a larger battery (3700mah vs 3000mah). But what we have so far established is that your S9 is having battery problems. You have an unlocked US Phone which has a SnapDragon 845, which should mean that your phone should have been lasting longer than my own Exynos version which has a known kernel scheduler issue causing decreased battery life for it compared to the SnapDragon version, and yet I'm lasting 13hrs standby on 3h30min screen on time. You should have been seeing something like 17hrs on the same screen on time.

    Anyway, it shouldn't hurt to do the little experiment I suggested. It could point out that there might be a problem hardware wise on your phone and you could want to ask for an exchange.
    12-06-2018 06:47 PM
  10. Gayle Lynn's Avatar
    The effect on battery as a result of poor quality cellular signal is known but isn't going to show up in battery stats.

    Using wifi calling instead is one way to alleviate and tell you.

    Q: you are using a sim you've had from before. Is it possible it is an issue?
    12-07-2018 04:45 AM
  11. Net_Surfer's Avatar
    I am reading this and I am shocked at the battery life that the gentleman that started the post is getting. Now I am a heavy user of this phone. I am talking notifications from Facebook, Messenger, Instagram, Snapchat(although not much), CNN, Twitter, The Score, TSN, Sportsnet, Tumblr etc.
    I take my phone off charge at between 6:30am and 6:45am and leave home at 7:30am. When I get to work at near 8:15am I am at 95%. And that is with all the notifications plus a daily phone call from my Mom that last 10-15 minutes!!! By the time noon hits, I am at or near 80%! By the time I am ready to go home at 5:00pm the charge is at 65%!!! So the battery life on this phone is damn good and in fact the best I have experienced on any Android phone!!!
    12-13-2018 12:56 PM
  12. Char42's Avatar
    Compared to S7, this battery is legit
    12-15-2018 08:06 PM
  13. hellosailor's Avatar
    I can still make the battery scream and moan in agony if I'm really USING the phone, but there's nothing really any better or different. Of course when engineers built cell phones...My Startac had a front battery back, plus a hook for a rear auxiliary pack that tripled the life. And if I kept a few spare packs (including one took AAA cells) I could use the phone for a long weekend without ever needing to charge it. Just slap on a new outboard battery. There's no reason phones can't do that today, except the marketing folks. You have to order a "battery case" to perform the same old trick, and most of those are way over-rated. But I've got one. It makes me phone twice as thick, yes, but it also more than doubles the run time, whatever that will be.
    In storm season I've done a week without AC power, battery banks are just a fact of life.
    12-15-2018 11:56 PM
  14. cdigga101's Avatar
    I think gsm technology does generally better battery life than cdma technology. I've jumped between using att and Sprint since the Nexus 5 days. And from my experience, I'd get a bit longer battery life on att than when I was on Sprint. I've had TMobile as well. Never had Verizon. I would guess gsm is passive in maintaining a signal whereas cdma is more agressive. Keep in mind I live in a city where all 4 major carriers have decent coverage, no gaps. So the cell signal no matter the carrier is pretty average.
    12-16-2018 07:14 AM
  15. hellosailor's Avatar
    I don't think the protocol in use (GSM, CDMA2000, etc.) makes the great difference. Bear in mind that the early cell phones used to chatter constantly, and always went to 100% power if they couldn't reach a tower. And then continued to run at 100% power seeking one. Someone (Nokia?) made big news when they attacked that in software, programming their phones to seek a tower--and if it couldn't find one in xx minutes, go silent for xx more minutes, then retry, then go silent, then retry at increasingly lower power levels.

    That kind of programming can be built into a phone by the phone maker, by default. It can be programmed into the OS, although I don't know if it is. It can also be changed, like everything else, at carrier request.

    So you've got three entities that all have a major say in how much power your phone is going to use, without even considering the protocol it connects with.

    Then there are the phones programmed (like Google Fi and T-Mobile's new plans) to always seek WiFi before turning on the cellular radio and connecting by cell. And even more that are programmed to use 3G instead of LTE (4G doesn't really exist in the US, it just means "3G with high speed backbone" which is still 3G in the phone) depending on how busy the service is, which type of signal is coming in stronger, and what priority you have.

    There's a lot that can be done invisibly in software, and you and I as end users will pretty much never find out about it until long after, when and if someone happens to blab about it, or some historical data is released. The carriers all consider this to be a matter of trade secrets, which isn't entirely wrong.

    ("Where's my spare tire?" Sorry, that's a trade secret, you'll have to bring the car in for service. (sigh)
    12-16-2018 01:20 PM
  16. Yee How Liew's Avatar
    My phone have very bad battery life, i just charged my phone to 92% at night and i turn on airplane mode then i went to sleep. When i woke up my battery become 75% at around 9 hrs from night till morning. I am using the exynos version of s9+
    01-16-2019 12:51 AM
  17. hellosailor's Avatar
    My phone have very bad battery life, i just charged my phone to 92% at night and i turn on airplane mode then i went to sleep. When i woke up my battery become 75% at around 9 hrs from night till morning. I am using the exynos version of s9+
    You do not know that your phone has bad battery life. You only know that something has run down the battery while you *thought* the phone was sleeping.

    You might have malware running on the phone. Or, some application might be consuming power in many ways. If you use the phones own power saving options to shut down apps that might be running in the background, and you go into the applications menu and force stop anything that might be running, and you run something like GlassWire to make sure nothing on the phone is enabling a radio and reaching out anyway, then you MIGHT have a battery problem.

    Or you might just have malware running on your phone, transmitting data all night while you think it is off.

    If that is all too complicated for you to followw, then you might want to go to the company that sold you the phone and ask them to do a total reset of it. Install no applications for 48 hours and see how the battery holds up. If it still drains by itself, then have the phone repaired/replaced under warranty.

    From what you say, it sounds that you charge your phone, then physically unplug it from the charger and let it stand overnight, which is a safe and sometimes reasonable practice. If that's correct, then there is no question of whether the charger is bad. If you are leaving the phone plugged into a charger, that's a whole other question.
    01-16-2019 02:06 PM
42 12

Similar Threads

  1. Charging Battery question
    By goldendaze in forum Samsung Galaxy Watch
    Replies: 7
    Last Post: 12-03-2018, 02:34 AM
  2. Replies: 9
    Last Post: 12-02-2018, 08:20 AM
  3. screen turning black with low battery
    By Android Central Question in forum Ask a Question
    Replies: 1
    Last Post: 11-29-2018, 12:43 PM
  4. My Android phone dies even at 85% battery life... HELP; need a solution!
    By Android Central Question in forum Ask a Question
    Replies: 0
    Last Post: 11-28-2018, 01:05 PM
  5. Replies: 0
    Last Post: 11-28-2018, 11:49 AM
LINK TO POST COPIED TO CLIPBOARD