I have actually made some progress on this one. Because plenty of people told me that their Gear S3 Frontier is working just fine, I finally grudginly bought a new one ― and guess what, the new watch shows exactly the same problem. Some days it's fine, still at 75% battery in the evening, but other days I'm out of battery in the afternoon even though the watch came off the charger that morning. Having two watches do exactly the same thing now made me start to suspect that the watch itself may not be the one to be blamed, but that the problems was rather something common to both watches, most likely an app that runs on both. One of the telltale signs for the battery drain is that the watch is quite warm when coming off the charger. The new Galaxy Watch app allows to check which app on the watch drains the most battery, so I thought: "Worth a look, and see what right now, while the watch is warm, is drawing the highest current...." Interestingly, it did not work. The Galaxy App was frozen, and would not connect to the watch. After this was the case a few times in a row, it made me wonder whether it may actually be the Galaxy App on my mobile that is to blame, rather than any particular app or a component or software problem on the watch. I have now started to kill and restart the Galaxy App on my mobile every time I notice the battery starting to drain faster than expected, and so far, that has always cured it...! Of course, could still be coincidence, and may also not be the same problem for everyone experiencing fast battery drainage, but I thought I share my experience, at least as a contribution to building the picture.... Best of luck, everyone!
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@Corn73 Many thanks for all the details, and your theory makes sense. Unfortunately, turning off the automatic updates has made hardly any difference at all for me. Maybe my battery is too knackered by now because of all the abuse it had to suffer and just is not up to the task any more... It is a pity though, because I love just about everything else about my S3 Frontier.
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This sounded like the perfect solution....! Only, for me it does not work. The "Gear S3" app is no longer available on the App Store, I now have to use the "Galaxy Watch" App. This is probably down to regional differences on the App Store servers...? Mine is likely to be "Europe"... When I open the "Galaxy Watch" App home page, there is no "Watch Status". There only is a "Battery Status", but it only shows the overall charge left in the battery, not the individual usage by each watch app. I attach screen shots just to rule out the possibility of having a daft day... the second screen shot shows what appears when I tap on the battery symbol on the first page. When I tap on Device Information, all I get is the MAC address, Bluetooth address, and serial number of my watch, which I do not want to post here for obvious reasons. As a side note, my battery power started on 100% this morning when I took the watch from the charger, then rapidly dropped to 23% by about 11 am. Now -- 1.20 pm -- it's back to 42%... go figure.... I mostly get a day's charge out of the battery these days, but once a month or so the watch will not last the whole day and needs topping up. My perception is that the battery is draining slower when I am in areas with good 4G coverage, but I do not understand why that would be the case, as my S3 is the "Bluetooth / WiFi only" variant without the GSM module...? Maybe the link between the iPhone and watch has to be open for longer if the iPhone is struggling to download the relevant information due to a bad G4 connection, and that additional time of the Bluetooth link being active may cause the battery to get drained....?! ... just a thought...
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When I first got my Gear S3 Frontier, I was very happy with the watch. A charge of the battery used to last me at least three days, and that was fine by me. Then suddenly, the battery started being completely drained within about 10 hours.
I thought that probably I have a power-hungry app installed, did a reset, install only trusted apps I have been using for a long time, and everything seemed fine again, battery lasts three days. I thought at the time that the issue had been resolved.
However, a few days later, the same thing happens again... and again... and again... ever more frequently... it seems to happen particularly after episodes of the watch having lost BlueTooth Connection to the phone, e.g. because of having been in airplane mode -- I travel a lot. On a side note, I also have the BlueTooth reconnection issue that is being dealt with in a different thread, and may or may not be related.
I have had the S3 Frontier now for about 7 months, and it has now become virtually impossible to use it for a full day. Even resets no longer resolve the issue. I have done a reset and not installed *any* apps, and yet the battery lasted only 10 hours(ish), so it's not just one dodgy app...
Anyone any ideas...?
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I have tried that, and that temporarily solves it, but next time I am out of BlueTooth range the same thing happens again, and I do not want to do the whole backup > reconnect > restore cycle each time the watch loses BlueTooth.
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