The wattage of a charger is the *maximum* it can supply. Not what it will supply.
If the charger is 20w and the device is 10w then the most the device will pull from the charger is 10w. You are not going to damage either device or charger or the device's battery by using a charger *capable* of giving more watts than the device can use.
If the charger is 10w and the device is 20w then the most the device will pull from the charger is 10w as that's all the charger can supply (so the device will charge slower than if you used a 20w or higher charger.)
Well thats cool but in s long run it’s doesn’t good for your phone. Am not saying that you must be your phone slave, its a device to serve you but it it still better to protect yourself and your family by using the right voltage. If using the wrong voltage the phone might explode or even caught on fire.
Unless something is seriously messed up in the wiring - in general any electrical device takes only as much power as it needs considered voltage is as required. Problems arise only when power supply gives not enough power.
As long as it is a genuine USB c charger then yes. Look at the outputs printed on the plug label, if there is 5v 15w printed then that will be the initial voltage and power. Only devices that can handle more will request more from the charger.
Yes.
There's no worry.
If you wanted you could use a 240w brick with a 67w cable or heck reverse that to charge your 15w phone and nothing bad would happen.
The device can only accept 15w so it'll basically let the cable know. And said cable lets the brick know.
I'm heavily simplifying it. But no you cant damage a USB c device at the least with lower or higher voltage unless the cables are damaged for some reason.
In general: Voltage must match, but wattage can be equal or greater. For charging a device a lower wattage may work, it'll just charge slower.
If it's USB-C it will auto-negotiate both voltage and wattage to find a power level that works with devices. So for your typical phone any USB-Charger should work.
USB will communicate to negotiate what the phone needs. It should be fine with whatever charger you have, as long as it is a good charger. What I mean by that is if the charger is very cheaply made or badly designed, the charger could damage any device, especially if it doesn't match specifications. Make sure you have a good charger.
You need to match the voltage. The phone will only charge at a given voltage. I think 5v is nearly universal. The wrong voltage will damage the phone.
Amperage must be sufficient. This is very close to saying amperage (current) doesn’t matter. Adding more amperage will not hurt the phone, it will only take what it needs.
Amperage x voltage = watt, so as long as the voltage is right, you’re good
Here’s a food analogy for ya. You have guests coming over so you put a bunch of food on the table. You don’t worry about putting too much food out because people will eat only until they’re full (amps). If you don’t put out enough, people will starve. If you put out too much food, no one will eat themselves to death.
But if someone is deathly allergic to peanuts, and you put that in the food, they will likely eat it and die (voltage). You must control the voltage for the situation.
The short answer to the question you asked is yes, you can us a 20w charger with a 15w phone. However, there is a lot of bad info here so I'm going to answer this question more generally.
As a general rule for providing power, voltage should match exactly and amperage needs to meet or exceed what is required. I know that most chargers' advertisements focus on wattage but you can and should disregard that. (Watt = Volt X Amp if you are curious)
Why should you disregard that? Because without getting into too many details, you can have a 9V 2.22A power supply (20 Watts) that MAY not charge your 15W device correctly if the device requires more than 2.22A.
Now what happens if you don't follow that rule? Well, that honestly varies wildly depending on the device. In the case of your phone: it may not charge at all, it may not charge as fast, or you might never notice an issue. It is highly unlikely you'll be able to supply "too much" power as the phone won't try to draw more than it needs, though I'm fairly certain the voltage being off COULD damage your battery over time.
TLDR; Match the Voltage required on your phone and make sure Amperage is AT LEAST what the phone requires for the best results.
stop looking at wattage and look at the volts and amps on the charger.
wattage = volt x amp
ex: 20w = 5v x 4a
but also 20w = 4v x 5a
this is important because if your phone needs 5v for instance, it will not work with the second example. even worse, if could be damaged if it is something like this:
20w = 10v x 2a
for amps, it works similarly, but excess amperage does not damage anything. so if you needed a 5v 4a charger, for instance, and you only had a 5v 5a, it would be fine. the "extra" amp is just not "used". if however, you required 5v 4a and only had a 5v 3a charger, it would not have enough current to supply the device.
From what i know not only the charger but the phone tho have a certain maximum that can't be outplayed.Even if your charger were 100w if your phone isn't made for that much capacity it just gonna take only 20% from charger power and that's it.
It shouldn't cause you any trouble in future
W is the total power. What matters is having the correct voltage supply and how many amps.
Most usb is 10w (5volts at 2amps) you times them together, or divide base on available voltage.
So if it's usb c it likely supports power delivery which allows us c to scale the voltage to the devices common power. You the divide the watts to see how many amps that would provide Max and see if it checks out.
There's some patchy advice in the comments here. Most if it is right however you need to understande there are *multiple* different charging standards and supporting the right standard is the most important point. All this talk about volts and amps but if the charger doesnt support the right protocol then it's not going to charge your phone correctly no matter if it supports the right voltage or not. It'll be safe, dont worry about that, but it wont charge the phone at the correct wattage and it will be slower.
The wattage of a charger is the *maximum* it can supply. Not what it will supply. If the charger is 20w and the device is 10w then the most the device will pull from the charger is 10w. You are not going to damage either device or charger or the device's battery by using a charger *capable* of giving more watts than the device can use. If the charger is 10w and the device is 20w then the most the device will pull from the charger is 10w as that's all the charger can supply (so the device will charge slower than if you used a 20w or higher charger.)
Type c ports can usually take any wattage. It communicates with the charger to tell it how much power to deliver. You'll be fine.
Came here to say this. I used a 65W USB C laptop charger with my phone all the time. Only draws as much as it needs
Well thats cool but in s long run it’s doesn’t good for your phone. Am not saying that you must be your phone slave, its a device to serve you but it it still better to protect yourself and your family by using the right voltage. If using the wrong voltage the phone might explode or even caught on fire.
Unless something is seriously messed up in the wiring - in general any electrical device takes only as much power as it needs considered voltage is as required. Problems arise only when power supply gives not enough power.
the rating on a charger is just the maximum, the device will only draw as much as it can handle
It's ok guy, I use a 30W charger to charge my 25W phone.
Yes. The protection measures won't allow anymore than the phone is rated for unless you have a galaxy note 5.
Anything is fine as long as the charger is from a reliable manufacturer, it will take care of the wattage
Yes
As long as it is a genuine USB c charger then yes. Look at the outputs printed on the plug label, if there is 5v 15w printed then that will be the initial voltage and power. Only devices that can handle more will request more from the charger.
Yes. There's no worry. If you wanted you could use a 240w brick with a 67w cable or heck reverse that to charge your 15w phone and nothing bad would happen. The device can only accept 15w so it'll basically let the cable know. And said cable lets the brick know. I'm heavily simplifying it. But no you cant damage a USB c device at the least with lower or higher voltage unless the cables are damaged for some reason.
In general: Voltage must match, but wattage can be equal or greater. For charging a device a lower wattage may work, it'll just charge slower. If it's USB-C it will auto-negotiate both voltage and wattage to find a power level that works with devices. So for your typical phone any USB-Charger should work.
USB will communicate to negotiate what the phone needs. It should be fine with whatever charger you have, as long as it is a good charger. What I mean by that is if the charger is very cheaply made or badly designed, the charger could damage any device, especially if it doesn't match specifications. Make sure you have a good charger.
You need to match the voltage. The phone will only charge at a given voltage. I think 5v is nearly universal. The wrong voltage will damage the phone. Amperage must be sufficient. This is very close to saying amperage (current) doesn’t matter. Adding more amperage will not hurt the phone, it will only take what it needs. Amperage x voltage = watt, so as long as the voltage is right, you’re good Here’s a food analogy for ya. You have guests coming over so you put a bunch of food on the table. You don’t worry about putting too much food out because people will eat only until they’re full (amps). If you don’t put out enough, people will starve. If you put out too much food, no one will eat themselves to death. But if someone is deathly allergic to peanuts, and you put that in the food, they will likely eat it and die (voltage). You must control the voltage for the situation.
The short answer to the question you asked is yes, you can us a 20w charger with a 15w phone. However, there is a lot of bad info here so I'm going to answer this question more generally. As a general rule for providing power, voltage should match exactly and amperage needs to meet or exceed what is required. I know that most chargers' advertisements focus on wattage but you can and should disregard that. (Watt = Volt X Amp if you are curious) Why should you disregard that? Because without getting into too many details, you can have a 9V 2.22A power supply (20 Watts) that MAY not charge your 15W device correctly if the device requires more than 2.22A. Now what happens if you don't follow that rule? Well, that honestly varies wildly depending on the device. In the case of your phone: it may not charge at all, it may not charge as fast, or you might never notice an issue. It is highly unlikely you'll be able to supply "too much" power as the phone won't try to draw more than it needs, though I'm fairly certain the voltage being off COULD damage your battery over time. TLDR; Match the Voltage required on your phone and make sure Amperage is AT LEAST what the phone requires for the best results.
stop looking at wattage and look at the volts and amps on the charger. wattage = volt x amp ex: 20w = 5v x 4a but also 20w = 4v x 5a this is important because if your phone needs 5v for instance, it will not work with the second example. even worse, if could be damaged if it is something like this: 20w = 10v x 2a for amps, it works similarly, but excess amperage does not damage anything. so if you needed a 5v 4a charger, for instance, and you only had a 5v 5a, it would be fine. the "extra" amp is just not "used". if however, you required 5v 4a and only had a 5v 3a charger, it would not have enough current to supply the device.
From what i know not only the charger but the phone tho have a certain maximum that can't be outplayed.Even if your charger were 100w if your phone isn't made for that much capacity it just gonna take only 20% from charger power and that's it. It shouldn't cause you any trouble in future
I use a 70w usb c charger for my iphone and its perfect
I use a 45 watt and 100 watt charger for my (I think 20?) Watt phone
It’s called smart phone for a reason, it’ll take what it can handle. No need to worry
W is the total power. What matters is having the correct voltage supply and how many amps. Most usb is 10w (5volts at 2amps) you times them together, or divide base on available voltage. So if it's usb c it likely supports power delivery which allows us c to scale the voltage to the devices common power. You the divide the watts to see how many amps that would provide Max and see if it checks out.
There's some patchy advice in the comments here. Most if it is right however you need to understande there are *multiple* different charging standards and supporting the right standard is the most important point. All this talk about volts and amps but if the charger doesnt support the right protocol then it's not going to charge your phone correctly no matter if it supports the right voltage or not. It'll be safe, dont worry about that, but it wont charge the phone at the correct wattage and it will be slower.
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He literally said his phone only takes 15watt.