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Charging Nexus S Faster

Is it dangerous to charge nexus S with nexus One Charger ?
nexus s charger is just 700 mAh but nexus one charger is 1000 mAh .
so it can charge nexus s faster , but can this issue be harmfull for nexus s ?!
THnX

It likely is no problem since the charging is controlled by the phone and the charger only supplies the voltage/current. Just make sure that the voltage is the same.

yes the voltage is the same , 5 Volts
but the current is different , you mean that just voltge is important ?
also I had an htc nexus one car charger (because I have N1 too) , its voltage is again 5 volts but the current is 2000 mAh !!
after I saw that current I bought a samsung car charger it's exacly 5 volts nd 700 mAh .
I'm not sure about nexus s , does it endure with 2000 mAh ?
if it is possible I thinks it will charge nexus s 2 or 3 times faster !

Your charger is a voltage source. That means that it will try to keep the voltage at the specified 5V. How much current comes out depends on the resistance of the circuit.
The 700mA is the maximum current you can take out of it before the voltage begins to drop.
There are quite some people who use stronger chargers, and thinking of the battery there should not be any problems until at least 1500mA (which would be 1C charging rate for the battery).
Considering the charging characteristics of LiIon batteries I don't know if it will reach full charge any sooner, but some people reported faster charging.

cgi said:
Your charger is a voltage source. That means that it will try to keep the voltage at the specified 5V. How much current comes out depends on the resistance of the circuit.
The 700mA is the maximum current you can take out of it before the voltage begins to drop.
There are quite some people who use stronger chargers, and thinking of the battery there should not be any problems until at least 1500mA (which would be 1C charging rate for the battery).
Considering the charging characteristics of LiIon batteries I don't know if it will reach full charge any sooner, but some people reported faster charging.
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Thnks! I didnt know about this.

Shouldnt be a problem unless voltages are different, i'm charging mine with a nokia 5800 cable connected to a USB port in the keyboard. Slow as heck but it charges.

The formula was :
W = V x I x T
W refers to power created or usage.
V refers to voltage should be constant at DC 5 volt, for ac should 110 v or 220 v.
I refers to flow. The flow in and out.
T refers to time or duration.
As u can see bigger flow will increase the result coz multiplied by time.
So on my opinion, it will not damage ur device as long the voltage stays at 5 volt. And it will charge faster.
But remember one thing. Don't charge too long, coz more time will create more power which ur device can't stand. For ex. Dont Charge overnight.
CMIIW
Sent from my Nexus S I9020T

rejanmanis said:
The formula was :
W = V x I x T
W refers to power created or usage.
V refers to voltage should be constant at DC 5 volt, for ac should 110 v or 220 v.
I refers to flow. The flow in and out.
T refers to time or duration.
As u can see bigger flow will increase the result coz multiplied by time.
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You are oversimplifying. What you are saying is true only for an ideal ohmic load resistor. Your phone is anything but that. In our case the current I is dependent on the time (among others) and a non-trivial function.
So actually the power used/transmitted is
W = integral( V * I(t) * dT )
assuming that V is constant. I depends on the charging circuit, the charger, and how full the battery is at the moment. If you hit the current limit of the charger, then even V is not constant anymore, but a (unknown) function of I.
So on my opinion, it will not damage ur device as long the voltage stays at 5 volt.
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This is likely true, assuming, that the charging circuit in the phone limits the current to a level safe for the whole power train. That would not only be the battery itself, but also the cable, the connector, the traces on the circuit board, the charging transistor, the inductor (assuming a switched mode charging, not sure whether it is) and so on.
And it will charge faster.
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That depends on the charging circuit and the battery protection circuit.
But remember one thing. Don't charge too long, coz more time will create more power which ur device can't stand. For ex. Dont Charge overnight.
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Click to collapse
You are still stuck in the ages of constant current, dumb lead-acid battery chargers. Nowadays we have "intelligent" chargers that monitor the state of the battery to ensure that doesn't go up in smoke by overcharging or to high charge rates.
Any sane design is current limited by the on-board charging circuit. I don't see why Samsung should have built anything else.

[Q] Are rapid/ultra/boost chargers safe to use?

I have an LG GT540 Optimus with LG IP 400 N, 1500mAh/3.7v battery.
My stock USB charger is rated at 300mA and I have another USB charger for my headset which rates at 400mA.
I have seen couple of chargers on Amazon that can go up to 500mA and came across car chargers that can go to even 1000mA.
Are these chargers safe to use? Do they have over heating problems or chances of damaging the battery? Do they affect battery life? Have any of you used one of these?

More amps if fine, more voltage is bad.
i think of it like this..
amps are only available, the device will take what it needs.
volts are forced from the charger regardless of the device.

mercianary said:
More amps if fine, more voltage is bad.
i think of it like this..
amps are only available, the device will take what it needs.
volts are forced from the charger regardless of the device.
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Click to collapse
Not really. A more than reasonable high current will cause over heating and possible melt-down.
High-voltage can be bad but almost all chargers use the USB voltage of 5-5.5V. So, it's fine.
Am just wondering if these high current chargers are safe and worth the money.

I would have thought the device had a limit to the Max current it would use to charge the battery avoid such things.
Sent from my HTC Desire using XDA App

mercianary said:
I would have thought the device had a limit to the Max current it would use to charge the battery avoid such things.
Sent from my HTC Desire using XDA App
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LG phones do have an overcharge protector fuse. However, most fuses have a high value that will trip only if a current that will instantly break the device are detected. Plus, most fuses depend more on voltage.
However, even if the fuse doesn't break, a high current may damage due to heat and stuff indirectly.

[Q] charger question

Hello,
I have a micro usb charger that cam with my hp touchpad. looking at the label it seems like it supplies a 2A current as opposed to the 1A our phone takes. Can i use it on the G2x resulting in faster charging or will i damage the battery?
thanks,
Ismail

imoumni said:
Hello,
I have a micro usb charger that cam with my hp touchpad. looking at the label it seems like it supplies a 2A current as opposed to the 1A our phone takes. Can i use it on the G2x resulting in faster charging or will i damage the battery?
thanks,
Ismail
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Click to collapse
You can use it as long as it supplies the correct the voltage. I use a 2amp charger with my G2X and I love how fast my phone charges. The phone will only draw as much as it can.

A faster charge results in a hotter battery. Some people think fast charging the battery is also the cause of the infamous SOD (Sleep of Death). Keep an eye (or ahnd) on your phone and make sure it is not getting too hot while on the charger.

phburks said:
You can use it as long as it supplies the correct the voltage. I use a 2amp charger with my G2X and I love how fast my phone charges. The phone will only draw as much as it can.
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The hotter the battery goes, the shorter the battery life span will result as li-ion battery doesn't quite like in hot temp. Never tried a 2A charger to charge my G2X, so I would not know. But I am using a 1A charger to it and it works great If 2A charges does not cause the battery to go too hot, it should be fine.

I've been using this charger since May with no issues. The battery will only draw as much as its capable of drawing. As long as the voltage is the same as the stock charger then there is no issue. You could connect it to a 5 amp charger and it would still only draw the 1.x amps its designed to draw.

Going too low on amperage is where you have to be careful.

thanks for the replies, turns out that 2A charger is 5.3V as opposed to the 4.8V LG charger...

phburks said:
I've been using this charger since May with no issues. The battery will only draw as much as its capable of drawing. As long as the voltage is the same as the stock charger then there is no issue. You could connect it to a 5 amp charger and it would still only draw the 1.x amps its designed to draw.
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+1 on that, LG may be dumb, but they're not dumb enough to let their phone overload with un-needed electricity.

slow charge

I read a post here and I didn't quite understand which charger should I buy for a quick charge.
Appreciate the help.

The one that came with the phone.
The phone will only take in what it needs.
This phone charges the fastest I have ever witnessed on AC obviously.

guy6136206 said:
I read a post here and I didn't quite understand which charger should I buy for a quick charge.
Appreciate the help.
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only use the charger given with the box cause they have settled some voltage parameters according to phone's battery ...so dont go for any other charger ...it might heat up your battery or any wrong can be happen to u ....
bro it is 2300 mah battery so it takes time to fill up some juice into battery ...
dont worry
Sent from my Nexus 5 using Tapatalk

Any 2 amp charger will work. 1 amp chargers will work too but won't charge as quickly.
Sent from my Moto X

http://www.androidbatterylife.com/2013/12/easy-pick-correct-charger.html

rahil3108 said:
only use the charger given with the box cause they have settled some voltage parameters according to phone's battery ...so dont go for any other charger ...it might heat up your battery or any wrong can be happen to u ....
bro it is 2300 mah battery so it takes time to fill up some juice into battery ...
dont worry
Sent from my Nexus 5 using Tapatalk
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Click to collapse
All (good) USB chargers are going to charge at the same 5V as the Nexus 5 charger. Any charger from another phone will work without issue, but if it's under 1.2A it will charge more slowly (many are 1A). Just don't buy a cheap, poorly made charger and you'll be fine.
aavvaallooss said:
http://www.androidbatterylife.com/2013/12/easy-pick-correct-charger.html
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The major assumption here that a slower charge leads to a higher run time is not true.
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
A slower charge leads to the saturation charge phase taking less time while the constant current phase takes longer. The battery in the Nexus 5 and the accompanying 1.2A charger is meant to give you the quick 70% charge that is discussed in the BU article and then trickle charge during the saturation charge. If you're charging overnight it doesn't matter which method you use, you'll still reach 100% around the same time and the runtime will be the same.

Tnx everyone, I have the original chargr but I lost is cable.
I tried many cables but that just are not fast enoug.
Any idea where I can buy one?

Safe charging input

I have a modified USB port that can deliver about 4amps at the normal USB 5volts will that effect my phone if I charge from it? Will the phone suck to much power and damage the battery?
I'm assuming the circuitry to limit the battery from charging to fast or over charging is built into the phone and not in the charger?
Cheers guys

H_L said:
I have a modified USB port that can deliver about 4amps at the normal USB 5volts will that effect my phone if I charge from it? Will the phone suck to much power and damage the battery?
I'm assuming the circuitry to limit the battery from charging to fast or over charging is built into the phone and not in the charger?
Cheers guys
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I don't think that the phone will suck up too much energy, but I'd advise you to be careful, because phone's circuitry was made to hold up to 3Amps (fast charging). If I were you, I'd absolutely try and then blame myself for whole life, what have I done if my phone died... But like I said. I cannot prevent you from doing it, but I can advise you not to. Keep me updated [emoji6]
Sent from Lenovo a6000 1GB version.