Bought a retina iPad mini recently and I've been using the 10w power adapter to charge my 5s. Is it safe to charge my 5s or will it affect the battery over time?
Bought a retina iPad mini recently and I've been using the 10w power adapter to charge my 5s. Is it safe to charge my 5s or will it affect the battery over time?
What's the output amps on the charger?
Edit: that's a stupid question. 10watts / 5volt = 2 amps.
Overheating a battery while charging certainly isn't good for it but I doubt you'll notice much. Does the phone get overly warm when charging?
You can control current in a circuit with current sources. I don't think it's as simple as P=I/V. Plus, as the previous post mentions, Apple is saying that these chargers are compatible with the iPhone.
That's very true. The source will limit it's charge. However have you ever used one? Using my iPad charger on my iPhone makes it very hot. You'll also notice faster charging times with higher amp chargers. Heat is not good for a lithium ion battery.
I had a 2.5a car charger and it would make phones I charged with it so hot they were uncomfortable to hold. Meanwhile my 750 ma charger keeps the phone at ambient temps but takes a very long time to charge.
I'm not at all saying it's not compatible I'm just saying it may not be the best thing you can do to a battery. That's why I asked if the phone got hot, if not or just warm I wouldn't worry about it. However if it's not even comfortable to hold I'd avoid it.
Generally with chargers ohms law works out btw. It does for all mine that I can find anyway granted I'm just looking at what I have laying around. Pretty sure an iPad charger is 2amp.
Generally with chargers ohms law works out btw. It does for all mine that I can find anyway granted I'm just looking at what I have laying around. Pretty sure an iPad charger is 2amp.
I have been charging my iPhones with iPad chargers for years.
Just because the charger can source 2 amps does not mean the phone can sink 2 amps.
The charging circuit in the phone is designed to sink a certain amount of current. If the phone tries to take too much, the voltage drops, and the phone draws less. If the phone takes less than the maximum current rating, then the regulator is loafing and has no problem maintaining a stable voltage.
So using a charger less than rated just means it takes longer because the voltage has to stay constant. Using a charger with more than rated current capacity is meaningless because the phone will only sink what it can sink.
Given that it's going to be designed with some overhead, so if there's more current available, it'll draw that, up to its design maximum.
That's very true. The source will limit it's charge. However have you ever used one? Using my iPad charger on my iPhone makes it very hot. You'll also notice faster charging times with higher amp chargers. Heat is not good for a lithium ion battery.
Generally with chargers ohms law works out btw. It does for all mine that I can find anyway granted I'm just looking at what I have laying around. Pretty sure an iPad charger is 2amp.
I don't think it's as simple as P=I/V.
That equation is wrong; it's P=I*V.
While youj're right that heat can't be good for a LiIon battery, it's been my experience that the phone heating up during charge has a lot less to do with which charger was used, and more to do with what the phone was doing WHILE being charged.
I've used an iPad 10/12W charger on my iPhones for years, and they have managed to charge rapidly and yet not heat up. At the same time, I've observed iPhones heat up quite a bit while on the standard low-output charger that comes in the box with them. The difference was that the iPhone was actively being used for something (streaming audio, GPS, video, or some other CPU intensive activity) that drew a large amount of power at the same time that the battery was receiving a a charge.
It is, but that's not its only output level. The Apple chargers have some intelliigence built into them, and will not force a device they're connected to, to take more current than they can handle. This might not be true for other chargers, such as certain cheap car chargers, and those chargers COULD cause problems. But using a genuine iPad charger is perfectly fine, and its use alone will not damage an iPhone or its battery.
That's very true. The source will limit it's charge. However have you ever used one? Using my iPad charger on my iPhone makes it very hot. You'll also notice faster charging times with higher amp chargers. Heat is not good for a lithium ion battery.
I had a 2.5a car charger and it would make phones I charged with it so hot they were uncomfortable to hold. Meanwhile my 750 ma charger keeps the phone at ambient temps but takes a very long time to charge.
I'm not at all saying it's not compatible I'm just saying it may not be the best thing you can do to a battery. That's why I asked if the phone got hot, if not or just warm I wouldn't worry about it. However if it's not even comfortable to hold I'd avoid it.
Generally with chargers ohms law works out btw. It does for all mine that I can find anyway granted I'm just looking at what I have laying around. Pretty sure an iPad charger is 2amp.
Bought a retina iPad mini recently and I've been using the 10w power adapter to charge my 5s. Is it safe to charge my 5s or will it affect the battery over time?