Related
I want to know what is the difference of charging using the cradle and charging using the adaptor. Which will full charge the battery faster? Which is advisable for frequent use?
I belive USB porst can only supply more or less 300 mA and as stated in the adaptor it can provide upto 2A. I want to know what is the effects on the different ampere rating and how the XDA manage it? Also want to know if the XDA have a over charging protection circuit and where is it located (at the unit or at the battery).
unless you connect the psu to your cradle
then the 12volt 500mA that the usb port can give
will mean it takes a longer time to charge
but you can just connect the psu to the cradle and it's the same
cradle vs power supply
Power supply charges the battery faster than cradle, but does it have an effect on the battery life? which is better to use to prolong battery life, the cradle or the power supply? Or may it is just the same?
My Alpine has a Lithium Ion battery - Li-ions don't suffer from the same 'memory effect' which NiCads and NiMHs do, so don't worry about having to full discharge the battery every time, or charge the battery up to a full charge when you first get it - just plug it in and go, to be honest.
I can't see any reason for a variation in input voltage or current having any discernable effect on the life of the battery, it'll just take a little bit longer to charge, that's all (when the battery starts to get full, the voltage drops right down and the unit 'trickle charges' the battery anyway, so slightly less current won't matter anyway).
I intend make a HD2 battery direct charger by a charger of O2 Xda IIs. The origin charger of HD2 has 1000mA current, IIs - 2000mA. Have any problem when we use a hight current charging?
Who know the answer?
noproblem if the current is not more than 5.5 volt
Is there other charger better? quicker charging..?
hd2 charger is 1000mA on 5.5 volt. SO there should not be any prob..
I'm using Nokia Charger AC-10X I think it was for N97, and it's pumping out 1200mA fast charging...
1+
I would also like to know a direct battery charger for HD2 batteries. I have 3 and it's annoying to charge all three before I travel. This would be a great find.
I've written a nifty little utility, a while ago, originally for my Xperia X1, but it works beautifully on the HD2 I just got. You can use the app to tell you if there is any difference in the charging rate. I do recommend, however that you charge from below 80% as the HD2 will start reducing it's charging rate automatically to make the cycle more delicate at < 90% to reduce the chances of damaging the battery. My HD2 at 50% battery will recharge at a rate of ~700mA on the regular charger.
P.S. I've never submitted this App to anywhere but it is free to use, mostly because there is a link to my Web Page and my web page hasn't been updated since I started the thing. Never seem to find the time since I do nothing but web work and Gran Turismo 5 seems to eat up my spare time lol. Evil game.
P.P.S. I know this won't help you if you create a direct charger for the battery, but if you use a higher mA micro usb charger, you can always test the difference in the phone itself. I have noticed you can also increase the charge rate by using airplane mode. Just a thought...
Hi all,
I know that on older phones the battery had to be emptied almost to 0% and the charge it to full. This was done for battery health or something?! Is the true for newer batteries?
Anyway I plan on buying a desktop dock, and i was wondering if it would damage my battery if i charge it when ever i can for random periods of time. Would this decrease my battery life time or in anyway damage it?
I think with this type of batteries you don't need to completely discharge and then recharge. In fact, that may harm the battery.
It's better to charge the battery whenever possible
yep ljesh is right
with lithium batteries that is not the case, i forget what the old batteries were called, but i think they began with a N..
You can't completely discharge these with normal usage since they have in-built lower end limits for protection.
-----------------------------------
- HTC Desire via XDA App -
You're talking about the memory effect.
The battery used in the Desire (Li-Ion/Li-Poly) does not have such a memory effect. (older did, like Ni-MH, Ni-Cd) So no, you don't have to and you shouldn't deeply discharge this type of battery.
Recharge it as soon as possible, as few as possible and let it charge till it's full without interrupting if possible.
Sometimes you'll read that you have to 'calibrate' the battery. You don't calibrate the battery, rather the charging controller, which estimates the battery capacity. Over the time this estimation can get wrong, thus you have to calibrate the controller by discharging the battery till it's empty and charging it till it's full (some do a few other tricks, too, however, it's only interesting if you have root). If you have issues with your battery (like shut-down at 10% or higher already) then consider such a calibration.
I have noticed that compared to my iPhone 4 charging the desire takes ages. Could it be because I am using a 3rd party wall charger?
Sent from my HTC Desire using XDA App
ste1164 said:
I have noticed that compared to my iPhone 4 charging the desire takes ages. Could it be because I am using a 3rd party wall charger?
Click to expand...
Click to collapse
yes!
The Desire can charge in two modes:
USB mode: Low current, can get charged from a normal 500mA USB port. Takes long
AC mode: High current, charges with 1A, only compatible AC adapters should be used.
How can the Desire detect what mode it can use:
If the Data+ and Data- lines in the USB cable are bridged, then it switches to AC mode, else it thinks it's connected to a USB hub or a device with max output of 0.5A.
So either get a AC Adapter which has those pins bridged, or modify a cable, or buy a USB cable which has those pins bridged already (don't know it exactly, but I think I've read that such a cable gets supplied by some HTC car adapter, but I don't know it for sure)
Just search about this topic, you'll find a lot of posts about it.
Thank you I will look for a proper chargeing cable.
Sent from my HTC Desire using XDA App
Yea this charger only outputs 500 mAh ill need to look for a better one.
Sent from my HTC Desire using XDA App
Thanks for all your replies
Hey guys,
I've used my HP touchpad charger a couple times now and it seems to drastically speed up charging. I thought I'd see if anyone else had experienced this as well.
Sent from my HTC One using xda app-developers app
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
Sent from my HTC One using xda app-developers app
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
Click to expand...
Click to collapse
That's not right. The charging speed is limited by the battery and their charging managemend, not by the charger. If the battery management is configured at 1A it is charging with 1A even if you use a 2A charger.
If you can charge the HTC One with a bigger charger faster than it is not negative for the battery because it's allowed by the battery management. But I don't think, that it is really faster. I will test it for myself later with the 2A Charger from the ipad.
jhonsok said:
I would not recommend using tablet chargers like that. Although it does speed up charging I think you might also wear out your battery quicker.
Sent from my HTC One using xda app-developers app
Click to expand...
Click to collapse
I do know where this is coming from but just isn't the case anymore. All batteries made for cells phones in the last 2 years have smart charging chips in them. Meaning they can not overcharge, charge too fast, or discharge too much. These batteries have tech built in that could charge them in about a hour. People think this was disabled to help prolong the life of the battery. This is also false. Fast charging does have a slightly negative effect but we are talking about 2% negative. So if the battery would have went through 2000 charge cycles normally than with a fast charge it would only last around 1180 charge cycles. It's a non difference. It is the reason people have been saying that the fast charge feature is disabled but they have no idea and it sounds good so the community here has decided it to be true.
Now technically it should not matter what amp charger we plug in as the phone should only take a certain amount. Now I know this is false as I also use the 2amp Touchpad charger and can confirm it does charge around 30% faster.
Can someone explain why the power capability of the charger makes any difference?
Rules of electronics. V = IR or in this case I = V/R Current = Voltage / Resistance
By definition if too much current is drawn from the power supply the voltage will collapse. Similarly, at any given voltage and input resistance, the current will never exceed a certain level.
So the worst that can happen is you damage a power supply trying to charge a greedy iPad with an under spec'd power supply.
But I see certain devices that say, never use a 2A charger as it can damage the device? Why? By definition it will never draw more current than the circuit is designed for.....what am I missing?
jonstatt said:
Can someone explain why the power capability of the charger makes any difference?
Rules of electronics. V = IR or in this case I = V/R Current = Voltage / Resistance
By definition if too much current is drawn from the power supply the voltage will collapse. Similarly, at any given voltage and input resistance, the current will never exceed a certain level.
So the worst that can happen is you damage a power supply trying to charge a greedy iPad with an under spec'd power supply.
But I see certain devices that say, never use a 2A charger as it can damage the device? Why? By definition it will never draw more current than the circuit is designed for.....what am I missing?
Click to expand...
Click to collapse
Nothing at all :cyclops:
Now if you use a .5 amp you do run the risk of burning it out as the device will try and pull more than .5amp and will succeed putting too much strain on the charger.
AFAIK the charging voltage/amperage is dynamically controlled by software(kernel). Starting from empty the voltage will be higher, but decreasing when battery is getting fuller.
VeixES said:
AFAIK the charging voltage/amperage is dynamically controlled by software(kernel). Starting from empty the voltage will be higher, but decreasing when battery is getting fuller.
Click to expand...
Click to collapse
The voltage of the power supply should be a controlled 5V (I know some poor supplies are not so perfect). The only way of changing the current being drawn is to change the resistance , but that would be a constant as determined by the battery itself (its current draw will change depending on how full it is at the time). If there was actually a charge controller circuit in the phone itself, then it should not matter whether you have 2A, 5A or 50A, because it should only ever draw the power it needs. Also if there was effectively a "short circuit" and you tried to draw 2A from a 1A power supply, the power supply voltage would collapse and charging would simply stop. Therefore the charging circuit will have been designed with an expected current flow. As voltage is 5V and the input resistance always remains constant, the charging current can never be more or less than what was intended by design! Of course if the power supply outputs 10V instead of 5V, then it WILL draw more current and do lots of damage!
Think of it this way. If you run at 5 mph, it doesn't matter whether you are 3 feet tall or 6 feet tall, you will still arrive at the destination at exactly the same time.
There are different cables that can be purchased that essentially have just the positive and negative connections in use. This removes the control connections that allow the phone to regulate the amount of power so it allows the device to charge at a faster rate.
I have used these cables for years on many devices and have never had a problem but it is worth noting that I only use them sparingly and the vast majority of the time I use the standard chargers that come with the devices.
MG
Stop with the FUD people, the only thing that matters is the voltage of the charger. It needs to be 5V or else it will damage the phone. Otherwise, the phone will self limit the amount of charge taken in.
Sent from my HTC One using xda app-developers app
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
fast charging batteries is not as good as slow charging for the batteries. It's not terrible, but it is worse for their health.
the smart chips in the phones are allowing to be faster charged = faster charge times. HTC probably allowed this because they knew it would pacify complaints about their slow charge.
The htc engineers saw it fit to include the charger they did, they know its charges slow, it's for a reason.
nullkill said:
Fast charging does have a slightly negative effect but we are talking about 2% negative. So if the battery would have went through 2000 charge cycles normally than with a fast charge it would only last around 1180 charge cycles. It's a non difference. It is the reason people have been saying that the fast charge feature is disabled but they have no idea and it sounds good so the community here has decided it to be true.
Now technically it should not matter what amp charger we plug in as the phone should only take a certain amount. Now I know this is false as I also use the 2amp Touchpad charger and can confirm it does charge around 30% faster.
Click to expand...
Click to collapse
Your numbers are a little off i'm afraid. If its only a 2% issue from 2000 charges.. you show 1180 to be then new charge..thats almost 50%. 50% would be 1000 charges.. 2% from 2000 would be 1960 Better number for your point
the_scotsman said:
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
Click to expand...
Click to collapse
Yeah it will degrade it quicker, but not significantly. I agree with the previous posts. Its fine to use a charger with higher amps than needed but its not good to use lower amps. (lower than 500ma) Lower amps will kill chargers quick. If usb is 500ma then these phones must be fine with variable amps (within its limits) I dont know what the variable numbers are but say its 500ma min, 2A max.. using a 3A charger or a 5A charger shouldnt make a difference in charge speed. It'll only draw 2A. (again hypothetical 2A here, 1.5 may be the max.) That being said... i wouldnt use a 2A as your primary or overnight charger though(unless you only sleep 3 hours ), no need for it..Since these phones dont have a replaceable battery your overnight charger should probably be 1A. Use a 2A during the day if you need a quick boost.
nugzo said:
Yeah it will degrade it quicker, but not significantly. I agree with the previous posts. Its fine to use a charger with higher amps than needed but its not good to use lower amps. (lower than 500ma) Lower amps will kill chargers quick. If usb is 500ma then these phones must be fine with variable amps (within its limits) I dont know what the variable numbers are but say its 500ma min, 2A max.. using a 3A charger or a 5A charger shouldnt make a difference in charge speed. It'll only draw 2A. (again hypothetical 2A here, 1.5 may be the max.) That being said... i wouldnt use a 2A as your primary or overnight charger though(unless you only sleep 3 hours ), no need for it..Since these phones dont have a replaceable battery your overnight charger should probably be 1A. Use a 2A during the day if you need a quick boost.
Click to expand...
Click to collapse
I used a Samsung 0.7A OEM charger for a while for my previous phones and always thought that the power is capped by the output of the adapter. If it's rated 0.7A the adapter can output up to what it was rated for; That is wrong on that assumption. Using Current Widget app also appear to support this as well as it was drawing on my S3, 0.999 mA when this adapter as in. I have switched to the 1A adapter because of that; the read outs using the app still shows up as 0.999 mA.
http://forum.xda-developers.com/showthread.php?p=40630411#post40630411
If using a higher one is no good like 2A, I guess we would be able to see what Current Widget saids as well. Supposedly the phone pulls what it needs to my understanding.
the_scotsman said:
Using a higher current charger will degrade the life of the battery faster than normal. It will also be hotter when chraging, thus further degrading the life of the battery.
Bear in mind USB2.0 can only provide 500mA and makes charging slower.
Using a 2A charger ON OCCASION will be fine, but long term use will degrade your battery, it's that simple.
Click to expand...
Click to collapse
I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
banksc said:
I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
Click to expand...
Click to collapse
here's a source. HTC engineers decided to include the charger they did.
bob13bob said:
here's a source. HTC engineers decided to include the charger they did.
Click to expand...
Click to collapse
Wow, aren't you a helpful one. There is much more to the H/W selection than what the charging circuit is capable of... Chargers don't "force" a current on the battery. The charging circuit draws what it needs from a charger, assuming it can supply what is drawn. A well designed charging circuit will draw no more than what the battery is capable of without damage. The only factor is heat, which should be accounted for at a nominal level. If heat was't properly accounted for, or they short changed the charging circuit (like the charger) there could be an issue long term.
As an application side note, I had a 2 or 2.1A charger on my Atrix 4G for the 2+ years I owned it and still on the original battery that will last me an 18hr day. You don't do anyone favors talking about stuff you don't know anything about.
banksc said:
Wow, aren't you a helpful one. There is much more to the H/W selection than what the charging circuit is capable of... Chargers don't "force" a current on the battery. The charging circuit draws what it needs from a charger, assuming it can supply what is drawn. A well designed charging circuit will draw no more than what the battery is capable of without damage. The only factor is heat, which should be accounted for at a nominal level. If heat was't properly accounted for, or they short changed the charging circuit (like the charger) there could be an issue long term.
As an application side note, I had a 2 or 2.1A charger on my Atrix 4G for the 2+ years I owned it and still on the original battery that will last me an 18hr day. You don't do anyone favors talking about stuff you don't know anything about.
Click to expand...
Click to collapse
It's already documented that other chargers charge the phone faster. HTC included a slow charger for a reason. You don't know more about battery technology then they do. Fast chargers are like $5 for us on amazon. htc can buy them for a $1. There reason is not cost. Why do you think HTC inclduded the charger they did.
There is no perfect battery with unlimited recharge cycles no matter how perfectly designed. Fast charging won't cause you device to explode, but it will accelerate the regular degradation process.
Htc knew people would complain about slow charging, so they allow other chargers to charge the battery faster on case by case, even if it means degradation (slight to moderate) of the battery over time.
You read more about fast charging vs slow charging in the battery geek forums.
banksc said:
I'd love to hear where your "simple" comment comes from? Facts, please. I will withhold my view until you can state sources... (Hint: heat will be the only factor in a properly designed system)
Click to expand...
Click to collapse
It comes from my own knowledge and experience. These are facts. If you choose not to believe them that's fine. And yes, I mentioned heat if you look back. And no, these are not properly designed systems.
The HTC One definitely takes a while to charge. What’s interesting however is that the charge curve gets the One to 85–90 percent under the normal 3 or so hours, it’s that last ten percent that takes forever. I also have confirmed that Qualcomm’s Quick Charge is not being used on the HTC One, for whatever reason, possibly to maximize compatibility with the portable USB battery chargers that are now proliferating. The PMIC is there, it just isn’t enabled. My guess would be that HTC wants to prioritize battery longevity and minimize any even potential extra wear since the battery on the One is sealed inside.
Click to expand...
Click to collapse
source: http://www.anandtech.com/show/6747/htc-one-review/3
told ya =)
Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Do you think I have a problem with my Nexus charger ?
Can anyone use the widget (drag from widgets to home while charging and set update interval at 1s) and share results what are you getting ?
I would be very thankful!
Update : My new nexus charger has 1.35 and gives 1.1A while my phone charger of .850 A gives 750mA.
Nexus 7 2012 gives 1.7-2.0 A
Hnk1 said:
Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Do you think I have a problem with my Nexus charger ?
Can anyone use the widget (drag from widgets to home while charging and set update interval at 1s) and share results what are you getting ?
I would be very thankful!
Click to expand...
Click to collapse
Did you try your experiment with a dedicated charging cable?
If I understand the issue correctly, using a sync cable for charging redirects some of the charging current for other purposes.
douger1957 said:
Did you try your experiment with a dedicated charging cable?
If I understand the issue correctly, using a sync cable for charging redirects some of the charging current for other purposes.
Click to expand...
Click to collapse
No, I havenot. Just the official Nexus cables and Xperia Cable. Xperia has built in fast charging as far as I know
Hnk1 said:
No, I havenot. Just the official Nexus cables and Xperia Cable. Xperia has built in fast charging as far as I know
Click to expand...
Click to collapse
What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
LinearEquation said:
What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
Click to expand...
Click to collapse
But try to charge N7 in car while using GPS with 700mA-800mA car adapter. You will get discharging, not charging, so you must use 2000mA. I recommend to use 2.1A for car(I am traveling a lot and never got disappointed), and normal 2.0 for AC charging.(5.0V)
Sent from my Nexus 7 using XDA Premium 4 mobile app
milleringer said:
But try to charge N7 in car while using GPS with 700mA-800mA car adapter. You will get discharging, not charging, so you must use 2000mA. I recommend to use 2.1A for car(I am traveling a lot and never got disappointed), and normal 2.0 for AC charging.(5.0V)
Sent from my Nexus 7 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
The OP did not specify with GPS in the car. But for that I use this in the car while storm chasing http://www.amazon.com/gp/product/B0088U4YAG/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1 20 Watt 4.2 Amp. I use GPS all the time and the Asus and Amazon bricks charge just fine while using GPS.
Still the tablet has to command the Amps it wants. This is decided in part by the Watts in the charging adaptor/brick. You can have a power supply with all the current capabilities in the world and it won't mean a thing without Power, Voltage and demand for Amps from said tablet/phone.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
LinearEquation said:
What those cords do is short pins 2 and 3 together allowing your tablet to command more current which will charge the battery faster if you have a charging brick with more Watts (power.) Bricks like the Asus and Amazon fast chargers for instance. More Watts means more current can be supplied at the same voltage. (P=I*V)
That said, you don't want to heat that battery to much. 700mA - 800mA is a great charge. I charge my tablet in 4 hours or less with that. You can also open your brick and short the pins but the cord is cheap enough.
Sent from my Nexus 7 Flo running CM 11 4.4.2 with ElementalX Kernel using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I don't believe that's possible. It's my understanding that charging circuits are "smart," in that they'll "take" a voltage and current that tends to maximize battery life and endurance, with thermal limiting to guard against overheating. I think the profile is for the current and voltage to taper off a bit as the battery reaches full charge. Some devices do this better than others, but that's the basic principle.
The charger itself is regulated. The regulator maintains a set voltage, in this case 5.0 VDC. As the device's power requirements increase, the decrease in voltage at the regulator allows an increase in current to maintain the set voltage. Once the device's draw reaches the capacity of the charger, the battery takes over, because the charger can no longer maintain the required voltage. In other words, a 2 amp charger isn't constantly shooting 2 amps to the device unless the device is demanding that much current.
On the subject of chargers, we're not talking about laboratory grade here. Your 2 amp charger may or may not be able to actually produce 2 amps, much as the actual output voltage may not be exactly five volts. It's also important to note in the discussion that device batteries aren't rated at five volts, but something less. 4.5-4.7 is a common range.
Hnk1 said:
Hello
I have a official nexus charger with ratings 2.0 A. My Phone was charging a bit slow so I tried different chargers with Nexus/phones to check the mA ratings with this application.
Current Widget : Battery Monitor
I am getting about 1000 mA from Nexus charger of 2 A while 750-770 mA from my phone charger which is 0.850 A.
Click to expand...
Click to collapse
Are you sure your Nexus charger is 2.0A? I think the 2012 charger was rated for 2A out, but my Nex7 (2013) charger lists 1.35A output on its nameplate.
Either way, could be that the 2013 Nex7 is configured not to draw a lot of current, generally this is for thermal management.
LinearEquation said:
0
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milleringer said:
1
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Click to collapse
douger1957 said:
2
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Click to collapse
arkolbus said:
Are you sure your Nexus charger is 2.0A? I think the 2012 charger was rated for 2A out, but my Nex7 (2013) charger lists 1.35A output on its nameplate.
Click to expand...
Click to collapse
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
I did few tests, asked my dad who is an Electrical Engineer and came to the following conclusions.
When I'm charging my phone/tablet ; say I'm using 1A, the power given would be around 850-900mA . The power be always less than rated.
If I'm using my phone and charging with same 1A charger, and the power used by my phone is 500mA, I would only see 350-400mA power given to battery as net because the power given would be subtracted from power being used.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
If charge power is less than usage of device, you would see discharge of device. In this case using a high power charger would charge the device but still it would damage the battery.
Basically, there is a safety factor of a device/battery. So if more current flows into it, lets say it can withstand 1.2 A and came with 1A charger. Using 1.3A or higher would damage the device/battery nonetheless.
I hope this helps and thank you for all your opinions and suggestions
Hnk1 said:
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
Click to expand...
Click to collapse
Glad we got to the root of your issue.
There are a couple of misconceptions though:
All things being equal, you are correct that charging at higher current will produce more heat and will generally reduce battery lifespan. It is not likely that you will damage the device by using a higher-capacity charger (unless it is some cheap knock-off charger, but those are dangerous regardless of capacity). The charger is not "constant current", meaning it does not always supply the full current, only what the device requests. Some of the supply current gets used to power the device, and some goes to the charging circuit.
The charging circuit limits the amount of current going to the battery based on how full the battery is (fast charge up to a certain charge % or cell voltage, then slow charge to ~100%), the battery temperature (if temperature is too high, reduce charge rate), and some maximum current (depending on the charge circuitry, battery ratings, design decisions, etc). edit: If you use a (quality) 2A charger, one of two things will happen: either your device will charge faster and you may reduce your battery lifespan, or the charging circuit will still limit the current to some lower limit (like 1.35A), and nothing will change. You are not really at any risk of causing device failure.
Also, there are not "more electrons" in the battery. The number of electrons stays the same, since current must flow in a loop. What changes is the energy state of those electrons. When slow-charging (constant voltage charging), as the battery is charged its voltage rises towards the constant charging voltage. The difference between the charging voltage and the battery voltage drives the amount of current, so as that difference gets smaller the amount of current decreases towards zero per ohm's law.
Hnk1 said:
First of all,I didn't realise I was using new nexus charger (1.35A) and I thought it was the old charger (2.1A). So that cleared the doubts if my chargers were faulty.
I did few tests, asked my dad who is an Electrical Engineer and came to the following conclusions.
When I'm charging my phone/tablet ; say I'm using 1A, the power given would be around 850-900mA . The power be always less than rated.
If I'm using my phone and charging with same 1A charger, and the power used by my phone is 500mA, I would only see 350-400mA power given to battery as net because the power given would be subtracted from power being used.
Using a 2A charger would charge the battery more quicker, about 2x but it would reduce the life span of battery as well and may damage the device.
As more battery is being charged, more amounts of electrons would be present inside battery so the flow of current would start to decrease slowly . (So it would take more time to charge in the end.)
If charge power is less than usage of device, you would see discharge of device. In this case using a high power charger would charge the device but still it would damage the battery.
Basically, there is a safety factor of a device/battery. So if more current flows into it, lets say it can withstand 1.2 A and came with 1A charger. Using 1.3A or higher would damage the device/battery nonetheless.
I hope this helps and thank you for all your opinions and suggestions
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I think that would be true... if there weren't a charging profile built into the unit. That profile has the most "juice" going to the battery below a certain charge state. It tapers off as the battery reaches the fully charged state. On some newer devices the batteries contain electronics that help things along. There is certainly thermal limits built in, and at any rate, on higher quality devices at least, only so much current is used for charging. It'll charge at whatever current level the manufacturer has designed and no more, even if more current is available.
And you're correct in that while the device is charging, some current is used for charging while surplus current, if available goes to the running device. Once the device's battery reaches a full charge, the full charger current is available to run the device. If the charger is capable of providing the current needed to serve the device's needs, life is good. Otherwise, the cycle begins again.
Generally speaking, so long as you're not flogging your device by taxing the CPU and or GPU, a 2 amp charger should be sufficient to run say, a music program and a nav program using the GPS. Plug an OTG cable in and start hanging peripherals off of the dongle and all bets are off.