在网上溜达的时候看到的。
J点：
Now let's talk iPhone.
IPhone 4S 1,420 mAh battery (1.42 Amps)
5 Volts x 1.42 Amps = 7.1 watts
iPad charger is 5 Volts 2.1 Amps 10 watts. Now you see the problem? Will it
work Yes, but you are over charging (forcing to much current) your battery.
End result you are decreasing the life of your battery.
全文：
Their was another post about this charging issue and I explained it all
basic on my educational level with electronics. Their were some people who
turned it into and utter and complete joke. 99% had no electronic background
but made tons of dumb comments. As the post went on a couple people that
were using the iPad charger on their iPhone ruined their iphone battery.
Once these people started posting that these people stopped with their
stupid replies. the reason volts, watts, and amps are put on chargers are
for a reason or else why would they put them on.
I can get really technical with formulas on this but I will go with a very
simple one. All Apple chargers are 5 volts. Amps is the amount of current
flowing into your device to charge your battery. Watts are easily calculated
V x A = W
Example. Charger is 5 volts and is 1 Amp so it has 5 watts (iPhone charger)
Charger is 5 volts and is 2.1 Amp so it is 10 watts (iPad
charger)
That one I just rounded up the number like apple did.
Most PC's 5 volts and it is .5 amps so it is 2.5 watts
Slow. Charging your battery is best to get the most out of it but who would
want to plug their new iPad into their PC and wait 24 hours for it to charge
??? No one, not even me. Despite it saying "not charging" on the screen plug
it in your PC overnight and remember what you started off with, turn off
the screen, let it go for 4 hours, and YES it will charge at a VERY slow
rate. The screen says not charging, but give it a try and you will see that
it did charge up but very little.
Has anyone looked up the battery capacity of the new iPad verses the older
generations??
iPad 3 11,500 mAh battery 42.5 watts
Pad 2 6,944 mAh battery 25 watts
So with their 5 volt charger 2.1 Amp 10 Watts you are fine because you are
not going over the battery specs .Pretty amazing how they achieved that many
mAh just by making it slightly thicker. Very technical how it was done but
not for this discussion but it is almost double capacity.
Now let's talk iPhone.
IPhone 4S 1,420 mAh battery (1.42 Amps)
5 Volts x 1.42 Amps = 7.1 watts
iPad charger is 5 Volts 2.1 Amps 10 watts. Now you see the problem? Will it
work Yes, but you are over charging (forcing to much current) your battery.
End result you are decreasing the life of your battery.
Apple says you can use any charger and you can see above a simple formula in
simple math. So why would you use a charger that is 2.1 Amps 10 Watts on a
battery that is 1.42 Amps = 7.1 watts
Does anyone know what the cost is for Apple to put a new battery in your
phone? I am curious on that one and would guess its not cheap.
Their is a formula in simple math. Can you use the ipad charger on your
iPhone ? Yes. Will it shorten your battery life using the iPad charger on
your iPhone? Yes.
This is the simplest formula broken down into simple math.
