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It's a brand new S5 watch. The battery was tested and found to be optimal. I was also able to reproduce this problem with S4. A friend of mine has S3 and is experiencing a similar issue.

Finally - the fact that reset helps for several weeks pretty much rules out a h/w problem - but rather points to a data issue.

I feel your pain. I initially upgraded form my s3 to a new s5. used it for a week it would barely last half a day even after turning off noise and always on features. Did resets and restores and new installs. nothing helped. first on 6 then on 6.1 for a day. I returned it.
Sadly i had reset my s3 because it was going to be turned in so it updated to 6.1 as well. Now that is having the same ****** battery life. Barely makes it 10 hours now when before i reset and updated it it would last a day and half easy.
This 6.x update is ****. my wife has not upgraded hers and its still going almost two days.
Very pissed
 
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I feel your pain. I initially upgraded form my s3 to a new s5. used it for a week it would barely last half a day even after turning off noise and always on features. Did resets and restores and new installs. nothing helped. first on 6 then on 6.1 for a day. I returned it.
Sadly i had reset my s3 because it was going to be turned in so it updated to 6.1 as well. Now that is having the same ****** battery life. Barely makes it 10 hours now when before i reset and updated it it would last a day and half easy.
This 6.x update is ****. my wife has not upgraded hers and its still going almost two days.
Very pissed

same problem here, but with S2.
 
I have a s4 and I would like to see a fix to the walkie talkie feature after use the s4 makes an awful hissing noise. Also why can’t they make the s4 the same as the s5 which has the option to show the time all the time surely that’s a software update which could be included in the new updates.
 
I have a s4 and I would like to see a fix to the walkie talkie feature after use the s4 makes an awful hissing noise. Also why can’t they make the s4 the same as the s5 which has the option to show the time all the time surely that’s a software update which could be included in the new updates.


I believe this is more than just a software update, the S5 uses an always on display which is different hardware/technology that uses far less power.
 
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