Develop Bugs

2A vs. 1A charger

In the meantime I got inspired by some threads in which people claimed that 2A (amp) charger will make it faster to charge up my note then original 1A charger. I bought original Samsung 2A charger for Samsung galaxy tab and tried that out and I must say that during the first week or two the charging time decreased from around 2.5 - 3 hours into something around 1h 40-50 min.
Later on everything returned to standard 3 hours though, charging with 2A charger is almost identical to 1A charger so from my experience there is no added value with this approach (unless ICS will make a change, or some custom rom).
For anyone interested I enclosed picture where in the top row you may see charging with 1A charger after 1h50min, 2h40min (both just random pics), then when this app (https://market.android.com/details?id=net.whph.android.battery) said it is 100% and the last picture is when galaxy note (Android) system said it is 100% (green battery icon). In the bottom row there is the same scenario with 2A charger. I am on the stock rom 2.6.35.7-N7000XXKKA.

Im not sure but I think you need a kernel that allows more than 1A charging for the 2A charger to work.

EarlZ said:
Im not sure but I think you need a kernel that allows more than 1A charging for the 2A charger to work.
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I guess so, what makes me slightly uncertain is that initially, charging time was around 2 hours ...

This is an interesting thread. I'd like to get more information about 2A chargers and whether they really make a difference.
Also I heard that when plugged to a TV (using the MHL cable) the phone may actually consume the battery more, even when plugged to the charger simultaneously. therefore if 2A chargers charge faster, it may also solve this problem.

Qvp said:
This is an interesting thread. I'd like to get more information about 2A chargers and whether they really make a difference.
Also I heard that when plugged to a TV (using the MHL cable) the phone may actually consume the battery more, even when plugged to the charger simultaneously. therefore if 2A chargers charge faster, it may also solve this problem.
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I actually have both, micro USB to USB and micro USB to MHL cables. Wasn't able to test them for a longer time as they sometimes work and sometimes don't, especially mhl cable shows videos for like 30 seconds and then there is a lost signal message on my TV, then it wakes up, then it is gone again ... I could fiddle wit it, but will rather wait for ICS upgrade and then will return to it again.
Sent from my SGN

Iphone charger
I am using the iPhone charger. It is a 2A and so far I see an improvement in the battery life. With the original charger (and BB one) the battery reading was 2100mAh . Now is 2600mAh. I don't know why or how.
Also I see a sightly improvement in how the battery lasts for normal use. I get around 18hours

antonioeram said:
I am using the iPhone charger. It is a 2A and so far I see an improvement in the battery life. With the original charger (and BB one) the battery reading was 2100mAh . Now is 2600mAh. I don't know why or how.
Also I see a sightly improvement in how the battery lasts for normal use. I get around 18hours
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Click to collapse
the iPhone charger is 1a... Only the ipad charger is 2a
Sent from my Galaxy Nexus

What we need is someone with 2 notes with dead batteries and plug the original charger 1a on one and a 2a charger on the other and see which one gets fully charged first! Maybe its me but I can definitely see a difference between the original and the one I'm using (playbook charger 1.8a)
Sent from my Galaxy Nexus

big samm said:
What we need is someone with 2 notes with dead batteries and plug the original charger 1a on one and a 2a charger on the other and see which one gets fully charged first! Maybe its me but I can definitely see a difference between the original and the one I'm using (playbook charger 1.8a)
Sent from my Galaxy Nexus
Click to expand...
Click to collapse
I did it, and while not with 2 notes side by side, you can have a look at the pictures at the 1st post, the time and charging rate shows its pretty same on the stock rom whether you use 1A or 2A charger. (Although it was very different first one or two weeks, after that battery get used to 2A charger and charging is as slow as with 1A ...)

antonioeram said:
I am using the iPhone charger. It is a 2A and so far I see an improvement in the battery life. With the original charger (and BB one) the battery reading was 2100mAh . Now is 2600mAh. I don't know why or how.
Also I see a sightly improvement in how the battery lasts for normal use. I get around 18hours
Click to expand...
Click to collapse
How did you measure the current in mAh or what app did you use? Thanks.

My bad. I am using the iPad chargers. not iPhone . Those are 2A. To verify I am using battery pro monitor.
Here is a screenshot.
Sent from my GT-N7000 using XDA

SGN stock batt with ipad charger?
Hi, I see some of you are using 2A/ipad charger to charge you SGN. My question is, will there be any side effects on that could harm the stock batt in short or long run?
FYI, atm, I have an ipad charger for home and car and i intend to just use the same charger to charge all devices including my SGN. Im not looking for a fast charging option, but just a hassle free and conveniences.
I appreciate if you could give suggestion on a dual port charger (for home and car) where I can charge my devices simultaneously at one time.

No harm as long as the volatage output from your charger is 5v. This is what pushes the current to ur device. Higher it goes more it pushes.
However the current that the charger provides decides how fast it can charge. This will also depend on the device. If the device is manufactured to charge at 1 amp and u use a 2 amp charger then it will only use 1amp. If however u use a 750mah charger it can only use 750mah and charge slowly.
@Taptalk-GalaxyNote

Dont use your note 1 charger

I doubt if anyone is as lazy as me but when I first got my note 2 the other day I didnt bother unpacking everything and just charged my phone on my old note 1 charger. I was very disapointed on how long it was taking to charge so I checked the specs written on the side of chargers and noticed the old charger has a 1amp output and the new charger has a 2amp output. Just thought id share this as I know alot of you are previous note 1 owners .
Sent from my GT-N7100 using xda app-developers app

i tried the galaxy s2 charger with 0.7 amps and it charger 10% overnight

podface said:
i tried the galaxy s2 charger with 0.7 amps and it charger 10% overnight
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Loool that's y it took me so long to charge my phone at my girlfriend's place ...
Sent from my GT-N7100 using xda premium

podface said:
i tried the galaxy s2 charger with 0.7 amps and it charger 10% overnight
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Click to collapse
If it was legit .7 amp charger, then it'd only take 3.1 mA/.7 = 4.4 hours to fully charge.
So something is wrong with your charger or widget.
I highly recommend a widget like battery monitor widget so you can observer how fast your phone is charging with whatever charger/cable combo you are using.
Some of my old note 1 chargers are happy, like my griffin car charger. Others, like my t-mobile 1A charger, definitely aren't.
YMMV.
- Frank

[Q] Better to use the 2amp or use a 1amp charger?

My wifes Galaxy S3 came with a 1amp charger. My note 2 came with a 2amp. Would it be better to charge the note 2 with the 1amp charger vs the 2amp? I remember reading a post that said the 1amp charger would take longer but the battery would hold that charge longer/better than what the 2amp would provide. The 2amp would charge it faster but the charge wouldn't be as good/longer lasting.
What do you guys think?
Thanks

Either one will work. I would use the 2 amp one. Just because the charger outputs 2amps it doesn't mean the phone will draw all 2amps.

the 2 amp charger won't get drawn for all 2 amps, but it will get drawn more than 1 amp. charging slower (with the 1 amp) won't mean it will keep the charge any better
Sent from my SPH-L900 using xda app-developers app

if you need speed use the 2amp. if you don't need speed you can extend the life of your battery by using the 1amp. (slower charge is healthier for the battery in the long run though not likely measurable by the likes of us)

jarablue said:
My wifes Galaxy S3 came with a 1amp charger. My note 2 came with a 2amp. Would it be better to charge the note 2 with the 1amp charger vs the 2amp? I remember reading a post that said the 1amp charger would take longer but the battery would hold that charge longer/better than what the 2amp would provide. The 2amp would charge it faster but the charge wouldn't be as good/longer lasting.
What do you guys think?
Thanks
Click to expand...
Click to collapse
There is a reason Samsung included the 2amp charger. The Note 2 has a huge battery. The 2 amp charger will charge your note 2 faster. The device draws the amount of amps it needs. The charge is held the same way, doesn't matter the amps. Im sure Samsung wouldn't include a charger that would damage/negatively effect the battery.
Sent from my SPH-L900 using xda app-developers app

question re: first charge

Wife and I bought a new tab 3 10.1 and put it on the charger at 11.30pm, at 8.30 the next night it was only charged to 83%. Should it take so long to charge the first time? How long does a typical full charge take?
TIA

Are you using the stock charger? Cause I know when I plug mine in my USB wall outlet it'll take forever, when I use a USB stock or non stock adapter its fine
Sent from my SM-T217S using xda app-developers app

What creep138 said. The stock charger is rated at 2 amps. If you use like a phone charger that is rated at 1 amp then you are severely extending your charging time. Make sure the charger is OEM Stock (or one rated at 2 amps) and make sure the cable is the thicker cable that came with the Tab.
I can get 100% in a couple of hours after a good hard use. But if I run it over night on the charger, I most definitely get 100% in the morning.

How many amps will the G4 draw when charging at 5V?

I know this phone is Quick Charge 2 capable, but does that apply only to high voltage charging, or also to standard 5V?
I ask because I bought a 3.1A charger, and though the phone was almost dead, it didn't charge any faster than the 1.8A charger that came with the phone. Is the charger defective, or will this phone just not draw 3.1A at 5V?

QC2.0 is 9V at 1.2-1.3A.
Normal 5V is at around 1.7-1.9A only.
It will not draw anything more than what's above. FWIW, IMO, QC2.0 doesn't make a huge difference

lambstone said:
QC2.0 is 9V at 1.2-1.3A.
Normal 5V is at around 1.7-1.9A only.
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Click to collapse
Thanks. So QC is only a protocol for changing voltages, it has nothing to do with negotiating or handling a higher current draw?

fenstre said:
Thanks. So QC is only a protocol for changing voltages, it has nothing to do with negotiating or handling a higher current draw?
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Click to collapse
QC is a protocol for allowing a maximum possible current draw at a predefined voltage. Just because you have a higher possible current supply from a charger it doesn't mean that the G4 will draw more.
E.g. G4 can only draw 1.8A a 5V. If you use a 1A charger, it can only draw 1A but if you use a 2A charger it will only be able to draw 1.8A and not the full 2A.

This phone is **** at charging 1% every 3mins at best. I'm at 44% 23 degrees Celsius and it says 2hour 4min to 100%. Ampere shows its only drawing 480ma on a 2A charger. Three cables.. Note 4 cable, Stock cable and a high quality third-party cable all the same. The cables work fine as they charge to Note 4 quick and a Tab 3.
I give up. I even put this LG poss on ICE to 18 degrees Celsius but still same crap. Night charging for me then. Even Note 4 quick charger can't help it.
Nice phone for sure but I'm going back to Samsung next upgrade, sorry LG.
Sent from my LG-H815 using Tapatalk

skyelm said:
This phone is **** at charging 1% every 3mins at best. I'm at 44% 23 degrees Celsius and it says 2hour 4min to 100%. Ampere shows its only drawing 480ma on a 2A charger. Three cables.. Note 4 cable, Stock cable and a high quality third-party cable all the same. The cables work fine as they charge to Note 4 quick and a Tab 3.
I give up. I even put this LG poss on ICE to 18 degrees Celsius but still same crap. Night charging for me then. Even Note 4 quick charger can't help it.
Nice phone for sure but I'm going back to Samsung next upgrade, sorry LG.
Sent from my LG-H815 using Tapatalk
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Click to collapse
Laters.

skyelm said:
This phone is **** at charging 1% every 3mins at best. I'm at 44% 23 degrees Celsius and it says 2hour 4min to 100%. Ampere shows its only drawing 480ma on a 2A charger. Three cables.. Note 4 cable, Stock cable and a high quality third-party cable all the same. The cables work fine as they charge to Note 4 quick and a Tab 3.
I give up. I even put this LG poss on ICE to 18 degrees Celsius but still same crap. Night charging for me then. Even Note 4 quick charger can't help it.
Nice phone for sure but I'm going back to Samsung next upgrade, sorry LG.
Sent from my LG-H815 using Tapatalk
Click to expand...
Click to collapse
What. You're using a **** charger. Get a proper charger. I know because I've tried mine on a **** charger, a Samsung Charger and an ASUS QC2.0 Charger. Nobody has the problems but you.

lambstone said:
What. You're using a **** charger. Get a proper charger. I know because I've tried mine on a **** charger, a Samsung Charger and an ASUS QC2.0 Charger. Nobody has the problems but you.
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Click to collapse
Ok... Note 4 charger, Tab 3 charger and Stock charger all sh#t chargers? Hmmmm OK.
My supposed sh#t chargers work fine on other phones. I guess i bought a sh#t phone. Anyway love the phone hate the charging. Cheers
Sent from my LG-H815 using Tapatalk

Proper cable. Settled:good:

skyelm said:
I guess i bought a sh#t phone.
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Click to collapse
It does sound defective, unfortunately. Mine charges at up to 1%/minute, and that's without a QC 2.0 charger.

I use LG stock charger and a third party 2.1A charger to charge, Ampere shows that it has around 1000 mah. Apart from the charger, the charging cable quality do affect the result too. Try to swap cable and test again.
IMO﹐stock charger with 5V 1.8A can charge quite fast with 2+ hours to fully charged from 0 to 100%, no need to go for QC2.0.
Sent from my LG G4 H818N using Tapatalk 4

I have found that my Original Samsung 2.1A charger sucks for the G4. Somehow it knows its a Samsung and doesnt want to provide anything over 1A. That charger charges at 2A my Galaxy S4. It takes like 3-4 hours to full charge from under 15%.
My LG G4 charges fkn fast with the original one and a Tronsmart QC charger. 1% every minute.