Related
Is this the highest?
http://www.seidioonline.com/product-p/pmc.htm
Post links if you know of higher ones, thank you.
Sent from my ADR6400L using XDA App
There are 2.1A usb adapters, but I don't think microUSB can take advantage of it. The one you linked is a 1A, which is the same as the wall charger HTC gave with the phone. I'm currently using a 1A usb adapter in my truck.
Ok that's probably what I'm looking for then. Are there wall chargers greater than what came with the phone that I can take advantage of?
Your best bet would be to try the USB adapters made for iPads. The Apple products can utilize the 2.1A chargers with their sync cables, but I'm not sure if a microUSB cable can though. I have some 2.1A wallchargers from some of my Apple products, I'll test them later and let you know what I find out.
http://www.verizonwireless.com/b2c/...ryDetails&archetypeId=12299&accessoryId=46370
I just got an Enercell from Radio Shack with dual usbs. Max output is 2.5A divided between the two ports.
http://www.radioshack.com/product/index.jsp?productId=11329448
on sale now for only $14.99. Seems to be of good quality.
The Motorola rapid chargers rock.
Guys, unless you mod the usb adapter 5V spec, you aren't doing squat with a "high power" adapter. The device has an input impedence that will draw a certain amount of current at 5v., and that's it.
Standard battery: 1400 mAh
Time to charge: 4 hrs (according to manual)
That's 1400/4 = 350 mA.
Most adapters on the market spec more than that, they're usually 500 mA or above. And again, unless you boost the volts, you're not going to be able to push more than 350 mA or so.
So don't waste you're money.
On the other hand, if your going to share a car outlet with another device like mp3 or ipod, then yeah, you'll need a higher output, two port, adapter.
Edit: It just occurred to me that if you're using the phone heavily while charging, then yeah you may need more than 500 mA. My currrent widget shows the phone can draw another 250 mA or so during use. That plus the charge totals to around 600 mA. But depending upon design, the phone may not be able to pull in all 600 mA. A test with a current meter would be real interesting.
The charger shipped with the Thunderbolt is a 1 Amp charger.
If I use a 500 mA charger the Current Widget shows a +450mA charge current. However if I use the 1A charger, I get a charge current of about +850mA.
Given that the google navigation gobbles over 400mA when running, you need a car charger with greater than 500mA capacity of you want the phone to charge at the same time.
Sent from my ADR6400L using XDA App
boingboingbilly said:
The Motorola rapid chargers rock.
Click to expand...
Click to collapse
Good to hear, I ordered one today for $11 on ebay. I had heard other people say they liked that one too.
Ecomaniac said:
Guys, unless you mod the usb adapter 5V spec, you aren't doing squat with a "high power" adapter. The device has an input impedence that will draw a certain amount of current at 5v., and that's it.
Standard battery: 1400 mAh
Time to charge: 4 hrs (according to manual)
That's 1400/4 = 350 mA.
Click to expand...
Click to collapse
You're making the incorrect assumptions that the charging rate is constant, and charging is 100% efficient. Li-ion batteries can be charged at up to a 1C rate (i.e. 1.4A for a 1400 mA cell). Add the power drawn by the phone itself, and a 1.8 Amp charger might not be unreasonable (1.8 A is the specified limit for micro USB connectors). Whether the phone will actually do a maximum rate charge, I don't know.
This, from a TI Application Note (Google for SLAA287, board won't let me post links):
A Li-Ion battery charging process consists of three stages:
· Slow Charge: Pre-charging stage using current of 0.1C
· Fast Charge: Constant current charging stage using current of 1C
· Constant voltage charging stage
During the slow charge stage, the battery is charged with a constant low charge current of 0.1C, if the battery voltage is below 2.5V. The slow charge stage is rarely used during the charging process of a Li-Ion battery.
The fast charge (constant current) and constant voltage charging are the most important stages during a recharge process. Most Li-Ion batteries have a fully charged voltage of 4.1 or 4.2V.
The battery is first charged with a constant current of 1C until a battery voltage reaches 4.1 or 4.2V. The firmware continuously checks the charging current by sensing the voltage at the current sense resistor (Rsense) and
adjusts the duty cycle of PWM output from the MCU. The battery's voltage is checked frequently.
Whenever found the battery's voltage reaches 4.1 or 4.2V, the charger will switch to constant voltage charging mode. The battery is then charged with a constant voltage source at a fixed battery voltage of 4.1 or 4.2 V...When the charging current falls below 0.1C, the charging process must stop.
Click to expand...
Click to collapse
Monoprice has Cig to USB(1A) chargers and the USB to Micro cables in multiple lengths(I ordered 6' ones) for far cheaper than you will find anywhere else
mike.s said:
You're making the incorrect assumptions that the charging rate is constant, and charging is 100% efficient. Li-ion batteries can be charged at up to a 1C rate (i.e. 1.4A for a 1400 mA cell). Add the power drawn by the phone itself, and a 1.8 Amp charger might not be unreasonable (1.8 A is the specified limit for micro USB connectors). Whether the phone will actually do a maximum rate charge, I don't know.
This, from a TI Application Note (Google for SLAA287, board won't let me post links):
Click to expand...
Click to collapse
very useful, thanks!
walbuls said:
Monoprice has Cig to USB(1A) chargers and the USB to Micro cables in multiple lengths(I ordered 6' ones) for far cheaper than you will find anywhere else
Click to expand...
Click to collapse
I second monoprice.
I tried bunch of cig to usb car charger and none matched advertised output... They all showed Charging (USB). I now use AC inverter and it charges just like a wall charger.
eccenpix said:
I tried bunch of cig to usb car charger and none matched advertised output... They all showed Charging (USB). I now use AC inverter and it charges just like a wall charger.
Click to expand...
Click to collapse
I suspect you need to find one which properly follows the USB Battery Charging Specification. That link is to the most recent version, which came out on 7Dec2010 (remember Pearl Harbor!). Version 1.1 is easier - a Dedicated Charging Port is indicated by shorting together the data lines (the two middle conductors on a full sized USB connector. By doing so, it indicates the device may try to draw up to 1.8 A of current (although a dedicated charging port is allowed to limit the current to less than that, it must provide at least 1.5 A).
I bought a cheap USB hub with 5 ports, used an exacto knife to cut the traces going to the data lines (the middle two) on all the ports, and then shorted them together on each port. It's now no longer a USB hub, but a USB charger with 5 ports I can used to charge stuff (phone and Bluetooth, quite often). The AC adapter which it came with does 2 Amps. My Thunderbolt says "Charging (AC)" when plugged into it.
So, if you can open up one of your adapters, just solder a jumper between the middle two contacts (make sure they're not connected to anything else).
Just got the Rocketfish premium microUSB at Best Buy and it has a captive coiled cord and a USB port. TBolt says "AC plugged" and reads +670 mA.
Good choice on the Motorola Rapid Charge - I've burned through 3 other cheap car chargers trying to keep my phone alive while using Google Nav and this is the first one to work!
i have the rapid motorola one on amazon
lippstuh said:
i have the rapid motorola one on amazon
Click to expand...
Click to collapse
+1 Works great! Battery widget usually shows about +800mA while only charging. Real close to the wall charger
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
Click to expand...
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.
Click to expand...
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
Hardware: HK version GN+Scotland MIUI 5.18+Sony EP850 Charger(5V / 1.5A)+2000mah original battery
Measurement soft: Battery Pro
Statistics:
6/5 00:47:49am Capacity 9%
6/5 01:57:36am Capacity 57%(Currency est. 915mah)
6/5 03:47:36am Capacity 100%
Charge time(9% ~ 100%) 3hrs 13sec
Charge efficiency = (2000x(100%-9%))/3 = 606mA/h(Per hrs 606mA)
Conclusion: Charge time is shorter than original 1A charger. But not too much
difference. Since the charge circuit is design to charge at small currency at
the beginning and the end(almost 1mAh)
I will post more figures based on Nokia 1.2A charger and Delta 5V 3A charger.
Pls share urs!!
Here's a graph to show the different charge time and currency between 1.2A and 1.5A.
X-axis is time(Minutes)
Y-axis is currency(mA)
I worked on giant lead-acid batteries on my submarine, and was intimately famiiar with charge current/voltage curves like these.
Li-poly is different game, I learn something new about them all the time. Thanks!
matika said:
Hardware: HK version GN+Scotland MIUI 5.18+Sony EP850 Charger(5V / 1.5A)+2000mah original battery
Measurement soft: Battery Pro
Statistics:
6/5 00:47:49am Capacity 9%
6/5 01:57:36am Capacity 57%(Currency est. 915mah)
6/5 03:47:36am Capacity 100%
Charge time(9% ~ 100%) 3hrs 13sec
Charge efficiency = (2000x(100%-9%))/3 = 606mA/h(Per hrs 606mA)
Conclusion: Charge time is shorter than original 1A charger. But not too much
difference. Since the charge circuit is design to charge at small currency at
the beginning and the end(almost 1mAh)
I will post more figures based on Nokia 1.2A charger and Delta 5V 3A charger.
Pls share urs!!
Click to expand...
Click to collapse
don't forget to include the links to buy them
Did you have fast charge enabled with a different kernel? I've found that there is no need for powerful chargers with Fast Charge enabled. A regular PC USB jack charger just as fast as my 1A wall chargers.
Isn't that a little too slow My phone charges super fast compared to this. And runs around 41 hours on almost standby mode.
arzbhatia said:
Isn't that a little too slow My phone charges super fast compared to this. And runs around 41 hours on almost standby mode.
Click to expand...
Click to collapse
Really? Pls post ur charge time here and ur battery capacity also.
Thank you!
DriveEuro said:
Did you have fast charge enabled with a different kernel? I've found that there is no need for powerful chargers with Fast Charge enabled. A regular PC USB jack charger just as fast as my 1A wall chargers.
Click to expand...
Click to collapse
Yes, I've enable the fast USB charge option(I'm using franco kernel 181r)
And I'm using 1.2A and 1.5A AC charger,but not USB charger.
Battery Pro reported they are all charging in AC mode.
No
Can a qi charger charge the nexus 5 when data and GPS is being used ?
Will it charge or will the battery drain?
Sent from my Nexus 7 (2013) KitKat 4.4.2
Power consumption during data and GPS use varies depending on what apps are used, signal strength ect... so there is no definite answer. In general, I notice slight battery drain when using navigation when on wireless charging. Google's nav app uses more power than the 500 mah the Qi charger provides but the drain is much slower than on battery alone..
rikudo said:
Power consumption during data and GPS use varies depending on what apps are used, signal strength ect... so there is no definite answer. In general, I notice slight battery drain when using navigation when on wireless charging. Google's nav app uses more power than the 500 mah the Qi charger provides but the drain is much slower than on battery alone..
Click to expand...
Click to collapse
Sorry, but what Qi charger are you using that only provides 500mA?
Even my $15 generic ebay Qi charger gets 751mA.
mmmmBACON said:
Sorry, but what Qi charger are you using that only provides 500mA?
Even my $15 generic ebay Qi charger gets 751mA.
Click to expand...
Click to collapse
500 mA was an estimate, individual results vary. Take into account wireless charging has an efficiency of 70-80%, so a charger with a 751mA output would effectively charge at 600-526mA. Add a phone case and/or imperfect alignment charging efficiency drops even lower. In real world use my 750 mA qi charger charges at about the same rate as a 500 mA USB port.
rikudo said:
500 mA was an estimate, individual results vary. Take into account wireless charging has an efficiency of 70-80%, so a charger with a 751mA output would effectively charge at 600-526mA. Add a phone case and/or imperfect alignment charging efficiency drops even lower. In real world use my 750 mA qi charger charges at about the same rate as a 500 mA USB port.
Click to expand...
Click to collapse
Oh yeah, I took that into consideration already, which is why I gave such an exact number. I got 751mA from a 5V/1A output rated Qi charger.
I've done a bunch of tests of charge rates with stock, higher amp chargers, and my generic Qi charger.
http://forum.xda-developers.com/showpost.php?p=48856141&postcount=18
As long as the Qi charger you buy is rated as 5V/1A output (which is almost all of them out there, including the official nexus wireless charger, tylt vu, etc.), you should get around the charge rate I mentioned if it's maxed out fully. So people buying the expensive Qi chargers, are not getting any speed improvement over the cheap one I bought. Might look a little nicer sure, but I'll gladly keep the $20 - $50 in my pocket instead. If you want to read my whole post, I linked it.
Here's just the data portion.
Stock 1.2A LG wall adapter: 1053mA
2A USB wall adapter: 1053mA
Built in USB input on power bar: 1053mA
USB 3.0 port (desktop computer): 446mA (surprised it was so low for a USB 3.0 charge port)
USB 2.0 port (desktop computer): 334mA
Generic Qi charger (2A input/1A output)/Built in USB input on power bar: 751mA
Generic Qi charger/Stock LG adapter: 751mA
Generic Qi charger/2A USB adapter: 751mA
Generic Qi charger/USB 3.0 port: 696mA (interesting compared to directly plugging into USB 3.0)
Generic Qi charger/USB 2.0 port: 502mA (low, but again higher than direct cable)
Click to expand...
Click to collapse
That's why I was just wondering what Qi charger you had and why you were saying 500mA because that is less than half the charge rate of the stock wall charger.
mmmmBACON said:
Oh yeah, I took that into consideration already, which is why I gave such an exact number. I got 751mA from a 5V/1A output rated Qi charger.
I've done a bunch of tests of charge rates with stock, higher amp chargers, and my generic Qi charger.
http://forum.xda-developers.com/showpost.php?p=48856141&postcount=18
As long as the Qi charger you buy is rated as 5V/1A output (which is almost all of them out there, including the official nexus wireless charger, tylt vu, etc.), you should get around the charge rate I mentioned if it's maxed out fully. So people buying the expensive Qi chargers, are not getting any speed improvement over the cheap one I bought. Might look a little nicer sure, but I'll gladly keep the $20 - $50 in my pocket instead. If you want to read my whole post, I linked it.
Here's just the data portion.
That's why I was just wondering what Qi charger you had and why you were saying 500mA because that is less than half the charge rate of the stock wall charger.
Click to expand...
Click to collapse
This is strange, I used the "Current Widget" app as well. . I'm currently using an Anker Powerbank, it's a 6000 mAh battery with a built in Qi charger which shows an average 500 mA charge rate. I also have an official Nexus 5 Qi charger that also shows about 500 mA charge rate. When connected directly to the Nexus qi charger wall adaptor I get a 1560 mA charge rate. Thanks for your data, this makes me wonder how accurate "Current Widget" app actually is since our results differ so much.
rikudo said:
This is strange, I used the "Current Widget" app as well. . I'm currently using an Anker Powerbank, it's a 6000 mAh battery with a built in Qi charger which shows an average 500 mA charge rate. I also have an official Nexus 5 Qi charger that also shows about 500 mA charge rate. When connected directly to the Nexus qi charger wall adaptor I get a 1560 mA charge rate. Thanks for your data, this makes me wonder how accurate "Current Widget" app actually is since our results differ so much.
Click to expand...
Click to collapse
Yeah, I used CurrentWidget as well, it's a pretty close estimate, but it won't be 100% accurate. I just didn't want to tear things apart and use a multimeter to take readings. Make sure your CurrentWidget update interval is set to 1 so it gives you live updates. Then you just have to give it a few minutes to stabilize (it will always fluctuate though) and watch for the consistent highest reading over a period of 5 to 10 minutes to be as accurate as you can. For my readings, 751mA kept popping up over and over again but never higher, so it was reasonable to say that was the max my Qi charger was capable as long as it was receiving ample power itself.
The charge rate will also vary depending on where in the battery charge cycle you are recording. At the beginning and end of the charge cycle, it will not charge at full speed and will slow down the charge. This is to protect the phone and the battery. For best range of recording, try to take your readings when your battery is charging around the 25 - 65% full mark, that way you can be pretty confident that your phone/battery is allowing the charger to charge at full speed.
What is your Anker Powerbank output rated as?
Also, was that 1560mA a consistent reading, or just a spike?
Most likely it'll go down if the screen is on, if the screen is off, it may stay or go up extremely slow.
Thanks for the replies.
If the charge will go down when screen, data and GPS are on.. Then it's not really a suitable for a sat naval replacement.
Looks like I'll need to go with a cable.
Sent from my Nexus 7 (2013) KitKat 4.4.2
Look at those car cable mods, they'll meet your needs and will give you an idea on how to hide the cables
Sent from my SM-N9005 using Tapatalk
The qi chargers I tried in the car slowly drain the battery with navigation and streaming music. Do I went back to the cord in the car.
Sent from my Nexus 5 using Tapatalk 2
Don't forget with GPS and other things on your temperature will go pretty high and could reach 45C where wireless charging practically turns off and your charger will only try and maintain the current battery percent. At least this happens to me monitoring it using battery widget.
Sent from my Nexus 5 using Tapatalk
I haven't gone so far as to install current widget, out even better battery stats, but I have taken some long trips with navigation and music streaming, screen on the whole time, and with the cheap Chinese 'c1' car mount, I always arrive with more charge than I left with. Maybe this is because I live in a cold climate, and the charger does not stop because of excessive heat.
Sent from my Nexus 5 using Tapatalk
mmmmBACON said:
Yeah, I used CurrentWidget as well, it's a pretty close estimate, but it won't be 100% accurate. I just didn't want to tear things apart and use a multimeter to take readings. Make sure your CurrentWidget update interval is set to 1 so it gives you live updates. Then you just have to give it a few minutes to stabilize (it will always fluctuate though) and watch for the consistent highest reading over a period of 5 to 10 minutes to be as accurate as you can. For my readings, 751mA kept popping up over and over again but never higher, so it was reasonable to say that was the max my Qi charger was capable as long as it was receiving ample power itself.
The charge rate will also vary depending on where in the battery charge cycle you are recording. At the beginning and end of the charge cycle, it will not charge at full speed and will slow down the charge. This is to protect the phone and the battery. For best range of recording, try to take your readings when your battery is charging around the 25 - 65% full mark, that way you can be pretty confident that your phone/battery is allowing the charger to charge at full speed.
What is your Anker Powerbank output rated as?
Also, was that 1560mA a consistent reading, or just a spike?
Click to expand...
Click to collapse
The Powerbank Qi output is rated at 500 mA. The 1.8A wall adaptor gives a fairly consistent reading above 1500 mA.
I set faster update interval and found the following averages. (Battery @ 50%)
Nexus Qi 1.8A wall adapter: 1500-1605 mA
Nexus 5 stock wall adapter: 900-1000 mA
Nexus Qi charger plate: 450-740 mA
Qi Powerbank 500 mA: 300-476 mA
PC 2A USB port: 550-750 mA
It seems the Current Widget rates the summarized magnitude of draw from the battery. For example having the screen on and higher brightness will subtract from the measured charge. To negate this I placed the phone in airplane mode, screen off and set sampling to 5 s. Then after 10 s turned the phone on to view the last sample taken with the screen off.
Looks like you were right, a 750 mA rated charger factors in transmission losses. The Official Nexus Qi plate puts out 750 mA max. The Powerbank puts out 500 mA as labeled. The 1.8A wall adapter was surprising though. Anand's article stated the max charge rate was 1.2A but the 1.8A adapter clearly exceeds this rate.
rikudo said:
The Powerbank Qi output is rated at 500 mA. The 1.8A wall adaptor gives a fairly consistent reading above 1500 mA.
I set faster update interval and found the following averages. (Battery @ 50%)
Nexus Qi 1.8A wall adapter: 1500-1605 mA
Nexus 5 stock wall adapter: 900-1000 mA
Nexus Qi charger plate: 450-740 mA
Qi Powerbank 500 mA: 300-476 mA
PC 2A USB port: 550-750 mA
It seems the Current Widget rates the summarized magnitude of draw from the battery. For example having the screen on and higher brightness will subtract from the measured charge. To negate this I placed the phone in airplane mode, screen off and set sampling to 5 s. Then after 10 s turned the phone on to view the last sample taken with the screen off.
Looks like you were right, a 750 mA rated charger factors in transmission losses. The Official Nexus Qi plate puts out 750 mA max. The Powerbank puts out 500 mA as labeled. The 1.8A wall adapter was surprising though. Anand's article stated the max charge rate was 1.2A but the 1.8A adapter clearly exceeds this rate.
Click to expand...
Click to collapse
That is interesting. My finding mirrored that of Anandtech. I used both the 1.2A stock adapter, and a 2A adapter and I was not able to increase my charging speed at all. It stayed at 1053.
Can you check the plug to see the voltage of the Nexus 5 Qi adapter. Is it 5V?
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
Click to expand...
Click to collapse
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..
Click to expand...
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).
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse
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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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.