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Apple enabled Nightstand Mode and I'm sure its because it is safe to keep on the charger all night. I kept my series 0 every night on the charger and when I bought a Series 2 the Series 0 battery worked as it did when I bought it. I believe I had it for 2 years. I kept the Series 2 all night as well for at least six months with no issues. I now track my sleeping so I no longer keep it on the charger.
 
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Why wouldn't it be? I have a Series 0 since launch day and I've been doing this for 2 and a half years and my battery lasts about the same as it did so many months ago!
 
I'm guessing you are worried about hurting the battery...

Don't be. Those days are long behind us, by at least a decade, if you are using quality products/batteries. I suppose if you buy some cheap battery pack or cheap consumer device you can be concerned. But anymore main brand consumer electronics are just fine.

Apple products have built in overcharge protection, so charge away. And no need to discharge first, etc.
 
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I'm guessing you are worried about hurting the battery...

Don't be. Those days are long behind us, by at least a decade, if you are using quality products/batteries. I suppose if you buy some cheap battery pack or cheap consumer device you can be concerned. But anymore main brand consumer electronics are just fine.

Apple products have built in overcharge protection, so charge away. And no need to discharge first, etc.

Thanks for the answer, I was just worried that charging every night when the battery wasn't empty would hurt the watch.
 
Is it safe to keep the Apple Watch on the charger every night?

The Apple Watch was designed to be charged on a regular basis, there is smart circuitry inside the Apple Watch that won't allow it to over charge. When the battery reaches 100%, it no longer charges, and it will only accept what charge it needs to stay at 100%. The battery is not damaged/weakened in any by leaving it on the charger.

https://www.apple.com/batteries/why-lithium-ion/

https://www.apple.com/batteries/maximizing-performance/
 
I plug my watch puck into an Anker 2.0 amp charger. The lights on this charger reflect what is going on.

When the watch is charging the light is green. When the watch gets fully charged, the light turns blue, which indicates stand-by mode (non-charging).

Just so you know, the charging and non-charging is not controlled by the Anker charger but, rather, by the internal circuitry of the watch (and in late model iPhones, as well).

 
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