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My wife and I have release day 6 watches. We're both sitting at 95%. I've babied mine (40-80) most of the time. My wife lets hers run out and charges whenever.
 
Wow. My release day series 3 is at 91%
I believe the battery for the series 3 is different than the series 6.

I wear my watch 21 - 22 hrs a day with lots of notifications and heart monitoring. I don't have time to baby it like some in this thread do. If I still have the watch in another year and the battery needs replacing, I will pay Apple $79 for a new battery.
 
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~8 month old SE, 97% battery health. I don’t wear the watch while sleeping and typically power it down — normally allows it to last two days.
 
Yes, keeping your Apple Watch battery between 20 and 80% is good advice. This is why Apple tries to time its top-off-charge to just before you actually need it (e.g. early in the morning, so it doesn't sit all night at 100%). 35-75 might be a bit better, but that's a considerably narrower range on a device that doesn't have long battery life.

My issue with my Series 5 is a little different. Until about a month ago, I never had an issue with battery life. Then all of a sudden it started hitting the 10% battery warning before noon or 1pm. I tried restarting it, wiping and re-pairing it, keeping cellular turned off, etc. The strange thing is that this doesn't happen every day. Some days I still have more than 50% left when I go to bed. It doesn't seem to make a difference if I'm away from my home WiFi network, whether or not I'm using GPS during activity tracking, etc. I can't figure out the pattern, and Apple doesn't want to replace the battery under AppleCare because it's not unhealthy enough (87% on the heath meter). I put the watch on an hour ago and I've been sitting at my desk, but it's already down to 81%.
 
My S6 is still at 100% battery health for now.

I have been curious if anyone else sees erratic behavior from time to time like I do though? On a typical day, I'll get up at 5 AM and do a 60 minute workout with music, then go about my day with around 20-30 notifications and end around 55% or so at 9 PM where it goes on the charger overnight.

Then I'll have a Saturday and or Sunday where I get up at 7:30, literally do nothing for most of the day aside from the same amount of notifications, but end the day around 50%. Logically, I would expect to see a much lighter load on a day like that.

I wonder if it somehow learns our schedules? I know that's absurd but I can't help but wonder. I've seen this kind of behavior now for the last 3 months so it's definitely not just a one off.
 
Purchased my SE beginning of October last year. I charge it every evening when I’m in the shower. And my battery health is 94%
 
Mine....
S4 - 100%
S5 - 96%
S6 -100%

In general I charge them at around 20-30% until they're full and then remove them from the charger.
 
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I wonder if S6 Apple Watch batteries will degrade faster than other models because of the fast charge capability. My launch day S6 Ti model is at 95%. My old S4 was still at 100% health after about 11 months before I sold it.
 
I believe the battery for the series 3 is different than the series 6.

I wear my watch 21 - 22 hrs a day with lots of notifications and heart monitoring. I don't have time to baby it like some in this thread do. If I still have the watch in another year and the battery needs replacing, I will pay Apple $79 for a new battery.
My Series 6 from the first week of January is having a similar battery run-down. I’m at 94% already with 6 months usage.

Like you, I’m a heavy watch user. I stream music via cellular while I run without my iPhone. And I’m broadcasting Bluetooth podcasts to my AirPods all day and when I go walking.

I regularly finish my day at 10% battery left when I put it on the nightstand at 10:30pm. Those of us who go through more battery in a day run through our 500 cycles quicker.
 
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My series 3's battery recently drained very fast too (barely surviving ~12 hours for normal daily usage). Was told the capacity is 91% after 8 month usage. Sent to repair center twice, but no actions were taken... Pain to wear it now
 
My series 6 from launch day had dropped to 88% despite a once daily charge, no different than previous generations. Had apple replace it with one that arrived at 100% capacity and within 1 month it's down to 96% which boggles my mind. They replaced it again for me fortunately, waiting for the replacement to arrive.
 
Series 6 @96% health. I charge mine every other day so usually it is down somewhere around 5-10% left before getting charged back up to 100%.
 
Apple Watch Series 3 Cellular / Purchased 11/02/2017

OK...
This is the first time I ever checked battery health on my watch.

Settings > Battery > Battery Health
MAXIMUM CAPACITY: 100%

I wear it everyday, charge it every night.
Seems a little suspect to me... 🤷‍♂️
 
Apple Watch Series 3 Cellular / Purchased 11/02/2017

OK...
This is the first time I ever checked battery health on my watch.

Settings > Battery > Battery Health
MAXIMUM CAPACITY: 100%


I wear it everyday, charge it every night.
Seems a little suspect to me... 🤷‍♂️
Some batteries come way over 100% capacity from the factory. I had an iPhone 6+ that was like 110%+ of design capacity from factory. Granted, most are at 100% or slightly under. But that's the only thing I can think of that would cause this.

My Series 3 had insane battery. Family still using it today (no idea health).

My Series 6 is at 95% and has OK battery life. I wear it everyday and charge it every morning as well.
 
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Series 6 bought in October, I use it a lot and I honestly don’t care about charging it properly because I will replace it for the series 7. It’s at 92 % capacity.
 
Series 6 stainless steel 44mm, bought in January. Wear all day every day, plop it on the 5w charger all night every night. Battery at 99%
 
My SS S5 bought at time of release is at 83% and it shows in the daily pattern. It is under extended AppleCare and I am waiting for it to drop below 80%.
 
I bought my SE in Feb (2021, obv). Shows 100%.
I don’t use optimized charging but I usually only charge from 35% to 75%. Give or take a few points.
 
I bought my S5 on release, so that is just a bit more than a year and my battery is at 99%. Never off my wrist other than to charge. That said, wait and see if it continues to drop and if it does return it. I am sure Apple has a line it must cross before being considered 'faulty'.
I have a series 5 that I bought new in April of 2020. It dropped to 86% suddenly. Along with this the "flights climbed" has gone berserk. I have cleaned the watch, and gone through everything except re paring it. I tried to reset the calibration, but when I do that nothing seems to happen My iPone 12+ just goes back to the screen where the Reset Calibratin option appears. shouldn't there be something that tells you your watch his recalibrating?
 
Yes, keeping your Apple Watch battery between 20 and 80% is good advice.
This advice applies to the gross capacity of rechargeable batteries in general. Apple however - like many other companies - hides the gross capacity and instead provides a net capacity to the user, which already considers the recommended safety margins for rechargeable batteries.

So while you of course can further optimize by keeping the net SOC (state of charge) in an even narrower window, the effect should be significantly lower and much less crucial than keeping the battery in the proper SOC window for the gross capacity.
 
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