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hinesmj

macrumors 6502
Original poster
Nov 19, 2015
344
248
New York
I've had my s3 for a little over a month. I charge it while I sleep each night. It's only down to maybe 65% battery left every day when I put it on the charger. Should I be waiting and charging every other day? Am I doing damage by charging every night when it hasn't even lost 50%?
 
No. Don't worry about it. In fact some people say not discharging li-ion batteries too heavily is better for its longevity. Anyway, you're unlikely to actually ever wear out your battery inside its lifetime; my watch has been charged (almost) every day for nearly 3 years now and it still gives more than a full day of use, even if I run the workout app for over an hour.

So again, don't worry about it! :)
 
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I've had my s3 for a little over a month. I charge it while I sleep each night. It's only down to maybe 65% battery left every day when I put it on the charger. Should I be waiting and charging every other day? Am I doing damage by charging every night when it hasn't even lost 50%?

Apples advice on charging:

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

Also:

Your Apple lithium-ion battery uses fast charging to quickly reach 80% of its capacity, then switches to slower trickle charging. The amount of time it takes to reach that first 80% will vary depending on your settings and which device you’re charging. Software may limit charging above 80% when the recommended battery temperatures are exceeded. This combined process not only lets you get out and about sooner, it also extends the lifespan of your battery.”
 
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No way to 'damage'. If you want to become an 'expert' on batteries then go here or don't over think it.

http://batteryuniversity.com

I'll stick with "don't over think it." Thanks!
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No. Don't worry about it. In fact some people say not discharging li-ion batteries too heavily is better for its longevity. Anyway, you're unlikely to actually ever wear out your battery inside its lifetime; my watch has been charged (almost) every day for nearly 3 years now and it still gives more than a full day of use, even if I run the workout app for over an hour.

So again, don't worry about it! :)

Thanks!
 
I'll stick with "don't over think it." Thanks!

Yeah that's probably your best strategy.

But just FYI, when I did a lot of research into it the best practice is generally to keep the battery close to the "middle" of the cycle. Keeping it in the 40%-80% charge range is a pretty good ballpark. But of course the real key is simply ensuring it stays charged when you need it to! Extended exposure to heat (like left in a hot car) is far more damaging than charging cycles.

I believe it's also recommended to periodically (maybe once every couple months) doing a full drain and recharge to keep the battery calibrated.
 
I've had my s3 for a little over a month. I charge it while I sleep each night. It's only down to maybe 65% battery left every day when I put it on the charger. Should I be waiting and charging every other day? Am I doing damage by charging every night when it hasn't even lost 50%?

Agree with most of the other advice on this page, however the general advice for years with lithium-iron batteries has been to occasionally discharge them fully-usually every month. This helps calibrate the battery meter.

Also, don’t be fooled into thinking that only discharging your battery to 50% or 80% saving you a “battery cycle”. You’re just using half a battery cycle instead. Charge it every other day down to 20%, or charge it every day down to 60%. It’s the same. There is no such thing as a free battery cycle

But in general, as others have said, don’t worry about it, as long as you don’t leave the device plugged in and charging for weeks on end, you won’t do it any harm whatsoever.
 
Agree with most of the other advice on this page, however the general advice for years with lithium-iron batteries has been to occasionally discharge them fully-usually every month. This helps calibrate the battery meter.

Also, don’t be fooled into thinking that only discharging your battery to 50% or 80% saving you a “battery cycle”. You’re just using half a battery cycle instead. Charge it every other day down to 20%, or charge it every day down to 60%. It’s the same. There is no such thing as a free battery cycle

But in general, as others have said, don’t worry about it, as long as you don’t leave the device plugged in and charging for weeks on end, you won’t do it any harm whatsoever.
While NOT worth the effort of worrying about (except in cars) a cycle is different depending of the discharge and charge rate.

From the 'Bible'
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Battery University said:
...Figure 6 illustrates dynamic stress tests (DST) reflecting capacity loss when cycling Li-ion at various charge and discharge bandwidths. The largest capacity loss occurs when discharging a fully charged Li-ion to 25 percent SoC (black); the loss would be higher if fully discharged. Cycling between 85 and 25 percent (green) provides a longer service life than charging to 100 percent and discharging to 50 percent (dark blue). The smallest capacity loss is attained by charging Li-ion to 75 percent and discharging to 65 percent. This, however, does not fully utilize the battery. High voltages and exposure to elevated temperature is said to degrade the battery quicker than cycling under normal condition....

Screen Shot 2018-07-04 at 4.23.21 PM.png


Screen Shot 2018-07-04 at 4.39.21 PM.png


Screen Shot 2018-07-04 at 4.35.40 PM.png
 
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