Develop Bugs

1A or 2.1 A?

So, I have powerbank and I have 2 ways of charging: 1A and 2.1A. which one to use when charging my note 2?
Handwritten from my Note 2

Depends on the cable you'd use. Samsung cable will go near 2amp, generic ones do about 1 amp

kebabs said:
Depends on the cable you'd use. Samsung cable will go near 2amp, generic ones do about 1 amp
Click to expand...
Click to collapse
I have samsung cable.. So is it smart to charge via 2.1 A ? Can it do some damage on the phone ?

I have a Momax external battery and have charged the phone with the 2.1A port. It didn't heat up, it didn't have any problems. I was planning on measuring the exact amperage that comes out of the samsung charger and the momax battery (iPower Pro), but I didn't get around to it, because I suspect the difference is actually smaller. There are many people who used more powerful chargers to charge their phones faster, and the only thing that degraded was the battery lifespan, but the difference in those cases was upwards of 0.5A between the original and the new charger. I find the 0.1A to be a small difference and I have no problem using the 2.1A port on the iPower.
So to answer your question, no, it won't damage your phone. Theoretically it damages your phone's battery, but it degrades anyway due to charging cycles, so you won't notice any damage caused by the extra 0.1A unless you plan on still using the note 2 10 years from now.

sandulea said:
I have a Momax external battery and have charged the phone with the 2.1A port. It didn't heat up, it didn't have any problems. I was planning on measuring the exact amperage that comes out of the samsung charger and the momax battery (iPower Pro), but I didn't get around to it, because I suspect the difference is actually smaller. There are many people who used more powerful chargers to charge their phones faster, and the only thing that degraded was the battery lifespan, but the difference in those cases was upwards of 0.5A between the original and the new charger. I find the 0.1A to be a small difference and I have no problem using the 2.1A port on the iPower.
So to answer your question, no, it won't damage your phone. Theoretically it damages your phone's battery, but it degrades anyway due to charging cycles, so you won't notice any damage caused by the extra 0.1A unless you plan on still using the note 2 10 years from now.
Click to expand...
Click to collapse
Thanks for reply mate ! I was thinking the same, but i needed some sort of confirmation tho

Use the 2.1A one.
The phone should only draw 2A from it anyway, that just means the port is capable of supplying 2.1A.
Using the 1A port will just charge your phone slowly, the 2.1A port should charge it as quick as the official charger, depending on which cable you use.

It is a matter of supply and demand. All USB devices can safely be plugged into any USB charger. Given an unlimited amount of current available from the charger, each device will still only draw only as much current as it is designed to draw. If the charger is rated 2.1 Amps or 5 Amps or 10 Amps, a 1.5 Amp device will still only draw 1.5 Amps. The charge rate will be at maximum Think of it like your house wiring. The circuit may have a 20 Amp circuit breaker in the basement but we plug in 40 Watt bulbs and 100 Watt bulbs and TVs and electric shavers that all draw different amounts of current. The 100 Watt bulb uses less than an amp but is unharmed being plugged into a 20 Amp receptacle (charger). Now we come to the flip side. If the charger Is rated lower than the device it just charges slower than it would if the charger could supply at least as much as the device uses. To go back to our example, the 1.5 Amp device plugged into a 1 Amp charger will take longer to charge that it would with a charger rated 1.5 Amps or higher. My analogy has one hole. If the stuff plugged into the house receptacles exceeds 20 Amps the circuit breaker pops. This will not happen with USB chargers as they limit the current and will not try to supply more than they are rated for. Stick to chargers rated as high as the one that came with your device or higher and you will be fine

What car charger do you use?/what's the maximum safe amperage?

My car charger broke, so I'm in the market for a new one.
I know 2.1 amps should be pretty safe, but I also see some with 3 amps. Is that still safe?
What do you guys use?

Pretty sure the S3 limits the amperage coming in so anything 1 amp and above should work fine in a car.

Best Buy sells one by Rocketfish that's micro USB and it also has a USB outlet on the plug itself and it's not bulky at all.
I generally shy away from car chargers completely but that charger won me over with it's build quality and specs.
Sent from my HTC6435LVW using Tapatalk 2

pappcam said:
Pretty sure the S3 limits the amperage coming in so anything 1 amp and above should work fine in a car.
Click to expand...
Click to collapse
Is that to say that anything over 1 amp is "throttled" to 1 amp so I shouldn't bother getting a 2amp?
re: rocketfish.
I see a bunch on there around the $20 mark. Looks overpriced, just like everything else I've ever seen by rocketfish.

1000 amps would be safe. As long as the voltage is 5v your good. The device will only take a certain amount of amperage, and the output device will only supply what the device needs. Voltage is different, too much of it can damage circuitry.
Sent from my SPH-L710 using xda premium

Okay, so how much can the phone effectively use? Surely 1amp is better than 1/2 for charge speed, but does 2 give you fatter charging than 1,or no?

According to BMW Pro my phone will charge at up to 1200ma on the stock battery and 2000ma when using my Anker 4400mah battery when plugged into a 2.1amp charger. I can confirm that the charging time for the extended battery is only slightly longer than the standard battery but still lasts twice as long in use. So I do believe the phone is capable off making use of a 2.1amp charger it just limits the charge rate to around .5C to protect the battery.
Sent from my cm_tenderloin using xda app-developers app

I use a new Trent 2 amp charger and it works fine. I used to use a 1 amp Motorola charger and it barely charged couple of percent when I had bluetooth, music, waze, gps, and screen on during a 20 minute ride. With the 2 amp charger, I easily get an extra 7% or so after a 20 minute ride.

Solar charger for Samsung Galaxy Note-II

I'm looking for portable (camping/hiking type) solar charger for Samsung Note 2 (T-Mobile version). Just bought GOAL ZERO Nomad 7+ Guide-I/O Plus (which is AA/AAA battery bank. When I plugged in my Note into the solar panel instead of charging it was draining battery, so after 2 hour I wen from 35% down to 19%. I did testing on the battery bank (from USB to micro-USB on the phone and it works fine). So my question is:
1) is it possible that the panel is defective or Note2 is simply so incompatybile with the whole world ?
2) is there any other nice solar kit that would work and at the same time is small and light enough.
This is also possible because Note-2 (as well as Galaxy-3) uses 11 pin instead 5-pin USB pinout...
Eventually I would like to charge also my Samsung SLATE-7. I plugged it to the panel through the lighter outlet (as I have an extra charger that takes the power from the lighter then converts it to the higher voltage/amps - I believe is is around 19-20V). The only problem is that (as I herd) charging this way would be pretty slow. I have spent several hours last two days trying to find something that would work but after my several bad experiences with Samsung I have to be 100% sure when I order something on line. In this case I was lucky as I bought Nomad-7 at REI store so I can easily return it. I've seen several nice chargers on line today but at this moment I cannot be sure that anyone of them would work.
Any advice appreciated.

The note 2 requires at least a 1 amp output JUST to run while you're using the device (ie screen on)... It will charge slowly at 1 amp with the screen off and the phone not in use.
1.5 amps is recommended minimum to charge while you're actually using the device...
2 amps is the stock wall charger...
USB 2.0 output is only 500mA... Which is enough to trickle charge the note 2 while not in use.
So basically... look for a Solar charger that has at least 5v 1amp (if not 2amps) USB output. That should charge it. Or it my opinion? Invest in a 11,000mah + External usb battery and separate Solar panel kit. Most solar kits come with dinky 4000mah or less battery packs which is barely enough to charge your phone once. (if that)

Solar charger

Any recommendations for sloar portable charger for NOTE-2 ?
I bought already one and instead of charging it is draining down the battery! Probably because it uncomon 11pins USB. This happens when I connect to solar panel. When I connect to battery power bank everything works fine, but my main puprose was to use the solar panels.
Arthur

What is the power output of the solar panel your using?

I think its 0.5 W
Sent from my SGH-T889 using xda app-developers app

Someone chime in here if im wrong. But based on output power of .5 watts, and voltage being 5 volts. I see that as having a current output of 100mAh.
Home computers have a usb output of 500mAh and the standard home charger that comes with it is 1000mAh or 1Ah charger.
Based on that, unless my math is wrong, which it could be as i suck at match, LOL, your not putting enough power into your phone. This is why its draining.
5 watts would give you 1000mAh output, which is whats recomended for the unit. I would say anything less then 3 or 3.5 watts would be breaking even.

IAmSixNine said:
Someone chime in here if im wrong. But based on output power of .5 watts, and voltage being 5 volts. I see that as having a current output of 100mAh.
Home computers have a usb output of 500mAh and the standard home charger that comes with it is 1000mAh or 1Ah charger.
Based on that, unless my math is wrong, which it could be as i suck at match, LOL, your not putting enough power into your phone. This is why its draining.
5 watts would give you 1000mAh output, which is whats recomended for the unit. I would say anything less then 3 or 3.5 watts would be breaking even.
Click to expand...
Click to collapse
correct. Minimum you'll need to charge is 5W or 1 amp. 500 mA will just slow discharge. The charger that came with the phone is 2 A or 10W, this is why it charges faster. He'll probally need to charge the battery pack on the solar charger, then use the battery pack to charge your phone.
Sent from my SGH-T889 using Tapatalk 2

Thanks for pointing that out _Dennis_ I have been using a 1 amp charger for mine, charging at night while im asleep. I was not aware that it came with a stock 2 amp charger. Ive got other 1 amp chargers set up from previous phones so i never used the stock one.
So my math above is off by 50% since i was basing it off 1 amp charging, and the stock is 2 amp.

Ok, so if I go towards phone/notebook solar charger, what would be recommended ? My Samsunf tablet comes with 19v 2A adapter so itlooks like if I have charger to supply this same amount of power it should work for Slate and Note2 as well. Right ?
Sent from my SGH-T889 using xda app-developers app

Is 19V the output? If so then NO. The Note 2 requires 5V 2A..

Galaxy Note 3 or iPad Air Charger

hi. the battery charger that i got with my LG optimu G Pro is ****. its just now that i checked that i have been deceived
its chinese copy and its only 0.2A charger...
now i know the reason why my phone charges soooo slow...
anyways. i think Note 3 and iPad air charger are 2A and 2.4A. so can i use iPad or Note 3 charger to charge my phone? will that be ok?
any one here using that?
thanks

Use OEM LG charger with 1.2 output. I am using LG G2 OEM charger and it charges very fast! But not sure it's compatible completely
Sent from my LG E988

If youre tech savy you can make your own,you just need a switchmode 5v regulator (they usually put out up to 3 amps) and you put a resistor across the data pins (i think 100 ohm) and itll charge the phone as fast as it can safely charge. I made my own charger for the car and the phone gets fully charged in about an hour and a half. (With screen on and playing Bluetooth music). Other wise if you buy a charger, get as many amps as you can. Atleast 1.5+ . and to make the phone charge in AC mode if it only says USB you need a resistor across the data pins.

Thats funny... my G Pro came with a 1.8a LG charger, my G2 came with a 1.2a.
Yeah you'll be fine. The "extra" amperage in the charger is available capacity that your phone can draw from, it will regulate itself but that can also depend on the charger and how they pin the USB. Its different than if you have extra volts (like a 10vdc charger which would provide too high of a voltage and damage electronics). I usually charge all my phones at when I get home with my wife's iPad charger super fast. Likewise you can use your LG charger to charge the iPad but will be slower since it has less amp capacity to supply. Part of the reason they provide the bigger charger is to sustain battery level while using the device (It should be large enough that the battery doesn't drain while your using the device while plugged into the charger).
Most computer USB ports typically provide .5a of power and will be your slowest charging option, at best you get a newer laptop with "high capacity" ports and it provides only 1.0a.

I've been using an iPad 1st gen charger with GPro since day one, been working flawlessly for 4 months now. Charges fast.