Hi
watch this video to get all info about the Optimus G battery
https://www.youtube.com/watch?v=O7Q8E5dzyxg&list=PLShKiWbiCfxbiMFDOHnS2Y_2HzAMwsRpI&index=26
Nice tech. I liked the way they managed cpu activities besides all.
My question is that why it takes around 2:30 to charge the phone fully?
According to this: http://www.qualcomm.com/media/blog/...-charge-10-less-time-charging-more-time-doing
OG benefits from Quick charge 1.0 which should boost charging process. Is it boosted by default? Is 2:30 fast enough for a 2100 mAh battery? or it's something kernel related and should be enabled?
2:45-3:00 its the charging time and its just fine.
You can always use a bigger charger and ruin your battery faster. Or explode..
Sent from my G using Tapatalk Pro
nikos523 said:
2:45-3:00 its the charging time and its just fine.
You can always use a bigger charger and ruin your battery faster. Or explode..
Sent from my G using Tapatalk Pro
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I don't want to ruin my battery bro. I'm just curious to know if other phones with the almost same specifications have similar charging time or not. I mean is this normal or not? Do you know about nexus 4 charging time? or xperia zr? these all have quick charge 1.0 while snapdragon 800 offers quick charge 2.0 and that's why phones like G2 having a battery with more capacity have under 2 hours charging time.
nikos523 said:
You can always use a bigger charger and ruin your battery faster. Or explode..
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Click to collapse
Well... Unless you use a charger that sets a current (extremely unlikely), it won't matter a single bit. Just a simple physics... All standard chargers provide stabilized voltage within certain current limits (that's your charger's Amp rating). The phone's battery charging circuit determines the current it draws from a charger. So, even if your bad-ass charger is capable of providing 10A output, your phone will not draw more than it needs when charging, which is about 1A (sorry, I don't know the exact charging current of the OG).
kt-Froggy said:
Well... Unless you use a charger that sets a current (extremely unlikely), it won't matter a single bit. Just a simple physics... All standard chargers provide stabilized voltage within certain current limits (that's your charger's Amp rating). The phone's battery charging circuit determines the current it draws from a charger. So, even if your bad-ass charger is capable of providing 10A output, your phone will not draw more than it needs when charging, which is about 1A (sorry, I don't know the exact charging current of the OG).
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the charging current of OG is 1.2. So, you mean the phone won't be charged faster if one uses a higher voltage charger?
akahroba said:
the charging current of OG is 1.2. So, you mean the phone won't be charged faster if one uses a higher voltage charger?
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If you use a higher voltage charger, you could simply fry your phone -- depends on the actual voltage. The protection circuit may simply shut off the input, or limit the voltage at 5V -- I don't know enough about the OG's schematics. But it should still limit the current at the value it's designed for. Anyway, I wouldn't experiment with that... But if you are talking about higher Amp-rated charger with 5V output, then it won't charge faster, unless the lower-rated charger is actually rated lower than the phone would take. Here, just a couple of examples, assuming 1.2A nominal charging current...
Example #1: 0.7A charger. The phone is trying to suck as much as it needs, but the charger can only supply 700mA. So, it will charge slowly.
Example #2: Stock 1.2A charger. The charger is supplying just what the phone needs, which is 1.2A. So, it will charge faster.
Example #3: 2A charger (or more). The phone will still draw 1.2A, even though the charger is capable of supplying more. So, it will charge at the same speed as with 1.2A charger.
Makes sense?
kt-Froggy said:
If you use a higher voltage charger, you could simply fry your phone -- depends on the actual voltage. The protection circuit may simply shut off the input, or limit the voltage at 5V -- I don't know enough about the OG's schematics. But it should still limit the current at the value it's designed for. Anyway, I wouldn't experiment with that... But if you are talking about higher Amp-rated charger with 5V output, then it won't charge faster, unless the lower-rated charger is actually rated lower than the phone would take. Here, just a couple of examples, assuming 1.2A nominal charging current...
Example #1: 0.7A charger. The phone is trying to suck as much as it needs, but the charger can only supply 700mA. So, it will charge slowly.
Example #2: Stock 1.2A charger. The charger is supplying just what the phone needs, which is 1.2A. So, it will charge faster.
Example #3: 2A charger (or more). The phone will still draw 1.2A, even though the charger is capable of supplying more. So, it will charge at the same speed as with 1.2A charger.
Makes sense?
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Oh, I see. Thanks. But, I don't know about the schematics either. I don't know if the phone has this smartness to draw as much as it needs or just draws as much as given. So, I won't risk either.
akahroba said:
I don't know if the phone has this smartness to draw as much as it needs or just draws as much as given. So, I won't risk either.
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Regardless of particular schematics, a properly designed charging circuit is always drawing the set current from a source. In other words, your phone is definitely smart enough to only take what it needs. Basically, "as much as given" in this context is incorrect statement... A charger "gives" a specific voltage (5VDC for USB-charged devices), and the device "takes" a specific current. So, no matter what the Amp rating of a charger is, it will only give as much juice (Amps) as the device decides to take (within a charger's Amp limit). If a charger can't provide enough current for the device, then you have a problem with slow charge, or no charge at all. But higher Amp-rated chargers are fine. If you have, let's say, a charger from a tablet rated at 2.5A, or a stabilized lab power supply rated at 20A, both of them would be OK to use for charging your OG. The only possible problem in this case could be a defective charging circuit in the phone, which might not limit the current the way it's designed to, and could draw enough from a high-powered charger to kill itself. Low-powered charger would simply not be able to provide a dangerous current, if that happens...
Having said that, I've got quite a zoo of various power supplies laying around, and I used all kinds of them rated up to 30Amp to charge different devices. Never had any problems.
Having said that, I've got quite a zoo of various power supplies laying around, and I used all kinds of them rated up to 30Amp to charge different devices. Never had any problems.
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and you've never seen any acceleration in charging time? So, it's just a common mistake that people say higher Amp-rated charger results in faster charge?
E977 battery difference?!
look at these two screenshots. one of them is E977 (in Spanish) and the battery is written to be SiO Lithium-ion. (SiO+ is used in G2)
the other is for E975 and the battery is written to be Lithium-Polymer.
Are these two the same?! Or this is an improvement made in hardware revision 1.2?
akahroba said:
and you've never seen any acceleration in charging time? So, it's just a common mistake that people say higher Amp-rated charger results in faster charge?
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Click to collapse
As I said before, it really depends what exact Amp ratings you are comparing... If a charger is rated lower that a phone's charging circuit, it will certainly underperform, and will charge slowly. But if your charger's rating matches or exceeds the charging current required by phone, then it makes no difference.
I personally don't have an OG stock charger, so I don't have any experience using a charger rated specifically at 1.2A. I only have USB chargers rated at 700mA, 850mA, 1A and 2A. Plus, an assortment of other power supplies rated anywhere from 2A to 30A. Of course, I do see a faster charging when going from 700mA charger to 1A, and then to 2A, because the first two are under-rated compared to the phone's specs. However, once I go with 2A or the higher rated power sources, there's no difference at all.
Hope that explains it.
kt-Froggy said:
As I said before, it really depends what exact Amp ratings you are comparing... If a charger is rated lower that a phone's charging circuit, it will certainly underperform, and will charge slowly. But if your charger's rating matches or exceeds the charging current required by phone, then it makes no difference.
I personally don't have an OG stock charger, so I don't have any experience using a charger rated specifically at 1.2A. I only have USB chargers rated at 700mA, 850mA, 1A and 2A. Plus, an assortment of other power supplies rated anywhere from 2A to 30A. Of course, I do see a faster charging when going from 700mA charger to 1A, and then to 2A, because the first two are under-rated compared to the phone's specs. However, once I go with 2A or the higher rated power sources, there's no difference at all.
Hope that explains it.
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Yes, the last sentence clarified it. Thanks alot mate.
Related
Hi,
I've lost my charger, and I don't know if I can charge it with a charger with 5v - 1A or not, what I do know is that charging with USB is 5v - 500mA.
What's the power of the SE Arc original charger?
On the charger it says output 5V 1A
Is that what your looking for
It's Exactelly what I'm looking for thank you very much
The original SE charger for the arc is the GreenHeart charger EP800. It has got an output of 5V; 850mA.
As far as I know, there's no SE charger with an output of 1A. I've seen chargers with 500mA, 700mA and the 850mA.
My charger got fried during a power surge while holidaying in India so after asking around on the forum, I bought a Nokia AC-10N charger with an output of 5V, 1200mA. I've been using it without any problems. Pretty happy with it. Charges the phone much faster.
Thank you, that helps very much, but I heared charging the phone with higher voltage or higher Amperage can charge it faster, but it lowers the battery life on the long terme, it's appreciated to charge it with lower power in order to preserve battery life
MehdiArc said:
Thank you, that helps very much, but I heared charging the phone with higher voltage or higher Amperage can charge it faster, but it lowers the battery life on the long terme, it's appreciated to charge it with lower power in order to preserve battery life
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Click to collapse
Totally true on all counts. You can really use ANY usb charger to charge your Arc, but the higher the mA the faster it will charge. And the higher the mA, the less overall life your battery will have. If it's normally supposed to be good for 5000 recharges, it might drop to 4000 recharges (just numbers pulled out of thin air).
The "Normal" standard for USB power is 0.5A (or 500mA). The iPad for example uses 1.0A, or twice as much as standard. Now in the iPad's case, it refuses to charge with anything less. I don't know if that's true for the Arc or not...if so, and the SE charger is rated at 850mA, then that's probably as low as you'd want to go just to be on the safe side.
Personally, I'm willing to use the iPad's charger and charge a bit faster for a bit lower useful battery lifetime. A new battery I can buy....time spent waiting for my phone to be charged I can't get back
The amperage rating on a charger defines the maximum current the charger is capable of supplying. A 1A charger doesnt force 1A down the throat of whatever's connected to it, if you connect something can only manage to pull a maximum of 500mA then it will only get 500mA.
Consumer power supplies are generally constant voltage. E.g. a 5V charger will supply 5V to anything connected to it. The amount of current that the device will draw at 5V is the amount it was designed to draw, up to the limit that the charger can supply. If the charger cant supply enough, generally you just get slower charging (though some poorly designed devices will just refuse to charge at all). What *will* tend to destroy your device quickly is a voltage mismatch, e.g. connecting a 5V phone to a 12V charger.
You can get constant current power supplies. These ramp up the voltage in order to force the required current out regardless of what's attached to it (even if that's a human being). They are scary.
daveybaby said:
The amperage rating on a charger defines the maximum current the charger is capable of supplying. A 1A charger doesnt force 1A down the throat of whatever's connected to it, if you connect something can only manage to pull a maximum of 500mA then it will only get 500mA.
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Click to collapse
Exactelly what I was thinking, thanks.
Now I think I can charge my Arc with 1A without any problem, since it's gonna take only 850 mA from it
I just picked up a Nexus 7 and was wondering if I can just use that 2A charger.
No.
You can go under but not over. You risk damaging the phone's charging circuit.
GldRush98 said:
No.
You can go under but not over. You risk damaging the phone's charging circuit.
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Click to collapse
Ummm. To the first response....your thinking of voltage not charging amperage. I might be wrong but I believe how much current your phone draws when charging is determined by the phone itself, not the charger. What you really want to watch for is a mismatch between the charger output voltage and phone input voltage, that's when the damage occurs
butikofer08 said:
Ummm. To the first response....your thinking of voltage not charging amperage. I might be wrong but I believe how much current your phone draws when charging is determined by the phone itself, not the charger. What you really want to watch for is a mismatch between the charger output voltage and phone input voltage, that's when the damage occurs
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Click to collapse
Your correct. The most it will draw at 5 volts is 1 amp. The best charger is the one that the phone comes with. If you want to learn more research ohms law and resistance balancing. Something like thevenin an mct.
tracerit said:
I just picked up a Nexus 7 and was wondering if I can just use that 2A charger.
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Click to collapse
Yes.
The Nexus7 charger will be just fine charging the Galaxy Nexus. It will not damage it at all. I use a Kindle Fire charger to charge my GNexus. It can provide up to 1.8 amps at a nice steady 5Volts, but it doesn't have to provide that many amps to charge the Nexus - so it doesn't.
Its the voltage, not the maximum amp capacity, that is critical, cannot be too high.
It is usually OK to use a too low amp capacity charger as well, the charging just takes longer. Usually...some chargers are designed poorly. When asked for more amps at 5V than they are designed to provide they could fail by just providing less amps than asked for at 5V, which would be fine but slow. What else could happen is that the voltage provided could start to vary. It could start to take on the characteristics of the AC current it is supposed to be converting to 5V DC. This can hurt your phone.
Moral of the story....the chargers that advertise half the charge time because they offer double the amperage are a scam/false. Just because they can provide up to that amperage doesn't matter, the device determines the actual current being pulled (I.e.--charging time)
Hi, my phone Note 2 baseband/ firmware is N7100UBALI9, but came with power AC charger USA prong(flat) with output 2 Ampere. All knowledge of electronics, I'm just wondering from a professional user (xda devs) is it safe using/charging regular charger output 0.5A or 1A?? or can degrades something inside the phone's/lifespan? All i know the device such iPad needs more Amperes to charge. Please check/see my charger photo below. I'm apologize my english is not perfect. I'm noob beginner. Thank you very much ,appreciate.
bongbongcong said:
Hi, my phone Note 2 baseband/ firmware is N7100UBALI9, but came with power AC charger USA prong(flat) with output 2 Ampere. All knowledge of electronics, I'm just wondering from a professional user (xda devs) is it safe using/charging regular charger output 0.5A or 1A?? or can degrades something inside the phone's/lifespan? All i know the device such iPad needs more Amperes to charge. Please check/see my charger photo below. I'm apologize my english is not perfect. I'm noob beginner. Thank you very much ,appreciate.
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My charger is 2 amp too (bought it Sweden). My older S2 has a 0.7 amp charger (both standard original chargers). The chargers them self can handle the amps printed on them without breaking or extending the charge time. The chargers are more or less "stupid" power supplies. The electronics in the phone handles the battery charge current. The phone even monitors the battery temp, and the charge current can probably be either aborted or limited based on the temp.
My opinion, based on knowledge as a kind of "advanced" electrician...
Note II is designed for the 2A charger, that's what it needs. You can charge with lower outputs, but it'll take a lot longer to do so.
The amperage of the charger does not affect a phone battery life span. The phone draws the amount of amps needed.
I'm guessing since Samsung provided a 2amp charger, that the note 2 should be drawing that much amps. Any other charger with less amps won't harm it, but rather take longer to charge.
Sent from my SPH-L710 using xda app-developers app
So i will not worry. Thanks because i was not sure if okay or not. Thank you guys. Appreciate your answer.
there is a component in the phone which will limit the flow of max current into the phone like the S2 (450amp and 650amp, iirc the values). changer provides 2amps but phone will draw whatever it is needed. in cases if it allows, 2amps speeds up the charging process.
The phone actually draws 1300mA.
change values
sianzb0i said:
there is a component in the phone which will limit the flow of max current into the phone like the S2 (450amp and 650amp, iirc the values). changer provides 2amps but phone will draw whatever it is needed. in cases if it allows, 2amps speeds up the charging process.
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hi! do you know how to change those iirc values? the charger provided with my note2 is rated 2A out. but when i charge, this charger generates a lot of heat. i think the heat is wasted current since the phone doesn't accept that much current. i just want to know how can i adjust these values.
thanks!
psycotrompus said:
hi! do you know how to change those iirc values? the charger provided with my note2 is rated 2A out. but when i charge, this charger generates a lot of heat. i think the heat is wasted current since the phone doesn't accept that much current. i just want to know how can i adjust these values.
thanks!
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Click to collapse
your charger is converting Alternating Current from your wall socket into Direct Current for your phone. The process isnt 100% efficient.
In PC's theres normally an efficiency rating that tells you how many watts of AC current is required to produce a certain amount of watts of DC current (converting from 110-240V down to 12V). ie. a 90% efficient power supply will draw 1000W of AC from your wall to produce 900W of DC for your PC. the remainder of that energy is lost in the conversion process and is often released as heat and other forms of energy.
same thing is happening in your charger. in the process of converting AC to DC (110-240V down to ~5V), some energy is lost, and some of that lost energy is released as heat. our note 2 can handle 2A of current with no issues, the heat is because our chargers are not 100% efficient in their conversion, not because the phone cant handle the current.
I've found a few older threads related to this, but nothing in the S3 or even a Samsung forum.
The stock charger outputs 5v at 1 amp. My Kindle Fire charger is also microusb, and outputs 1.5 amps. I know the phone should only accept as much amperage as it can handle, but does anyone know what the upper limits on this are? People were talking about wiring up crazy Frankenstein cables to get 4 amps in other threads, but I'd assume that's way too much current for the battery to make use of.
From an electrical standpoint, that's a horrible thing to do. Like a person being electrocuted, its the amps that kill you, not the voltage. Its rated for that because the components are likely to fail above that range.
teh roxxorz said:
From an electrical standpoint, that's a horrible thing to do. Like a person being electrocuted, its the amps that kill you, not the voltage. Its rated for that because the components are likely to fail above that range.
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If the old adages were all we were going by, our 1A chargers would be deadly. 1A across your heart is certainly (way more than) enough to kill you, but the resistance of your body vs the 5v output makes the amperage negligible. I've have experience working as an electrician, including on fighter jets. I know Ohm's law, believe me.
What I'm really asking is at what amperage does heat/risk of damage outweigh the faster charge times, and if the hardware caps the charging at a particular amperage in order to avoid damage. I have no plans on making some crazy 4A charging cable. I mainly want to know if using the 1.5A Kindle charger will hurt my phone.
lemoyneiv said:
If the old adages were all we were going by, our 1A chargers would be deadly. 1A across your heart is certainly (way more than) enough to kill you, but the resistance of your body vs the 5v output makes the amperage negligible. I've have experience working as an electrician, including on fighter jets. I know Ohm's law, believe me.
What I'm really asking is at what amperage does heat/risk of damage outweigh the faster charge times, and if the hardware caps the charging at a particular amperage in order to avoid damage. I have no plans on making some crazy 4A charging cable. I mainly want to know if using the 1.5A Kindle charger will hurt my phone.
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Lol Ohm's law..engraved on my arm. Though in short, you could generally get away with +10% on max voltage. 1.5A "shouldn't" affect it sparingly, though prolonged usage of it could shorten the battery life.
lemoyneiv said:
I've found a few older threads related to this, but nothing in the S3 or even a Samsung forum.
The stock charger outputs 5v at 1 amp. My Kindle Fire charger is also microusb, and outputs 1.5 amps. I know the phone should only accept as much amperage as it can handle, but does anyone know what the upper limits on this are? People were talking about wiring up crazy Frankenstein cables to get 4 amps in other threads, but I'd assume that's way too much current for the battery to make use of.
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My stock phone charger was 5V, .7 amps. Regardless, the charging current is limited by the phone, not the charger. It has 2 charging modes. If hooked to a USB port it limits to .5 amps (set by USB standards). If connected to a dedicated charger the phone will charge to a higher limit, 1 amp (I think). You could hook a 100 amp charger to it with 0 gauge cable and it would still only draw a max of 1 amp.
These limits are to protect the life of the battery. High current charging is really bad for the battery,(not too good for your phone either when your battery explodes.)
Hello Everyone
I'm little curious
Just wanted to ask that is it safe to use a 2.1A charger on 1.8A phone ?
Because most of the car chargers come with either 1A or 2.1A..
Since our G3's comes with a 1.8A chargers..
Is extra 0.3A too high ?
Will it affect the battery life ?
I was reading some articles but didn't get the answer :silly:
On the other hand I also read that..
Too low current (using a 1Amp charger for a tablet designed to charge with 2 Amp charger) causes less damage, but slows down the charging cycle which may deteriorate the battery charging levels or performance in the long run.
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Did anyone notice from his/her personal experience ?
So the question is which is safe-er ?
To use 1A or 2.1A charger when 1.8A is not available ?
it's not a problem, cause it s the phone that dictate the charging current ( that is in Ampere and not milliAmpere , 2.1A = 2100mA)
emibale said:
it's not a problem, cause it s the phone that dictate the charging current ( that is in Ampere and not milliAmpere , 2.1A = 2100mA)
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Ops !
typing mistake :silly:
I have used a range of different ones 0.5, 1, 1.2, 1.5, 1.8, 2.0, 2.1 max, different brands too) for my G3 for the past 6 months, no detectable adverse effect on phone or battery.
omr911 said:
Hello Everyone
So the question is which is safe-er ?
To use 1A or 2.1A charger when 1.8A is not available ?
Click to expand...
Click to collapse
Charger is not a current source, it's voltage one. Meaning voltage will be 5 volts, and current will change depending on load.
The current is dictated by resistance of charger, phone and cable. 2.1 A marking simply means that it won't output more than that regardless of resistance.
And yeah, phones do regulate their charging current, so it's absolutely safe to use any charger.
Plus...if battery dies...it is replaceable.
What about ..
Too much current, like using a 2 Amp charger on a phone which is designed for 0.8 Amp or 1 Amp charging may heat up the battery, may hurt the circuitry or may make it misbehave because of static charge build up.
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omr911 said:
What about ..
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?..
Well, either the quote is more than 3 years old, or the one who wrote this is an idiot.
read:
https://en.wikipedia.org/wiki/Battery_charger#Mobile_phone_charger
https://en.wikipedia.org/wiki/Power_supply#AC-to-DC_supply
basically, the charger is an AC-DC converter. Charging current is determined by phone, but it can't exceed the maximum current specified by charger's manufacturer - mainly because trying to draw more current from it will make voltage drop below acceptable level.
Samsung phones have a user-controllable charger chip, which is able to drop the current till voltage stabilizes, etc etc etc. I'm 146% sure that other manufacturers use something like that too.