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realtyknep

macrumors newbie
Original poster
Mar 21, 2015
13
0
If you leave be charger on all night, say 8 hours, will the battery be damaged over time considering it fully charges in 2.5 hours?
 
Apple has done some incredible engineering in their charging solutions to avoid damaging battery capacity.

I was reading somewhere the other day that iOS devices charge to something like 105%, allows it to drop to 95%, and then charges to 100%. Not sure if that is completely accurate, but I'm incline to believe that there's more going on than meets the eye to preserve battery life.
 
You can't charge a battery to 105% capacity in the same way you can't fill a glass to 105% capacity.
 
Apple has done some incredible engineering in their charging solutions to avoid damaging battery capacity.

I was reading somewhere the other day that iOS devices charge to something like 105%, allows it to drop to 95%, and then charges to 100%. Not sure if that is completely accurate, but I'm incline to believe that there's more going on than meets the eye to preserve battery life.

Yeah to say Apple hasn't thought of this long ago is just ridiculous.

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You can't charge a battery to 105% capacity in the same way you can't fill a glass to 105% capacity.

Gas can capacity says 5 gal and it holds over that. Why does it hold over that? To allow space for pressure, less chance of spilling, etc...
 
Today's batteries have microchips in them that monitor health, etc, and prevent over charging or excessive drain.
 
You can't charge a battery to 105% capacity in the same way you can't fill a glass to 105% capacity.

Actually the analogy is not quite correct. In most types of batteries like lead acid and alkaline this would be more correct. However Lit-ion's are more like balloons than glasses. You can always add a little more charge until they burst (catch fire). This is why they MUST have complex system monitoring circuits in the charging system to determine the best/safest cut off for discharging and charging points.
 
Apple has done some incredible engineering in their charging solutions to avoid damaging battery capacity.

I was reading somewhere the other day that iOS devices charge to something like 105%, allows it to drop to 95%, and then charges to 100%. Not sure if that is completely accurate, but I'm incline to believe that there's more going on than meets the eye to preserve battery life.

This is the right idea. The numbers are more like "charge to" 96% and "discharge to" 94%. All while the phone displays 100% (it would consider 94% to be 100% and scale the rest of the meter equally).

The main takeaway is that the phone is very intelligent about taking care of the lithium cells. Users do not have to worry about disconnecting the charger when the device hits 100.
 
Apple has done some incredible engineering in their charging solutions to avoid damaging battery capacity.

I was reading somewhere the other day that iOS devices charge to something like 105%, allows it to drop to 95%, and then charges to 100%. Not sure if that is completely accurate, but I'm incline to believe that there's more going on than meets the eye to preserve battery life.

I stated that in a thread :) and it is true.
 
You can always set the alarm for 2.5 hours so you can wake up and remove your watch from the charger. Problem is that you will need to set another alarm to put it back on charge a hour or two before you wake. :rolleyes:



:D
 
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