3 original charger, 1 problem! - General Accessories

Hi Guys.
First off, I'm new here, and I did use the search function. However I did not find anything to my problem in particular.
I have a Lenovo Tab 2 A8-50 (it sucks, I know that by now).
I have 3 different original charger with the original cable that came with the devices.
1x Samsung Galaxy Note 5 - Adaptive Fast Charging - 5V, 2A.
1x iPad Air - 5.1V, 2,1A.
1x Lenovo Tab 2 charger that came with the device - 5V, 1.5A.
If I use any of those 2 other than my Lenovo charger, the charging process is incredibly slow.
For example, with the Lenovo 1.5A charger it takes about 90 min to charge from 25% to 100%.
If I use the Samsung or iPad charger, which have 2A , it takes 4-5 Hours!!
How is that possible that a 1.5A charger , charges faster than a 2A or 2.1A charger? Especially by so much?
I thought a higher Amp charger gives you shorter charging times?
Thanks

Related

[Q] Genuine charger for Note II / Slow Charging

Have noticed that the output on the Note II charger is higher than it was on my S3. Does anyone know where I can get another genuine one or equivalent travel one with the same output. Have used my friend Google but no luck.
Also, can a usb cable also affect the charging rate. e.g. I am currently charging my Note II in work with the original charger part but different usb cable and is only on 70% after 3 hours where as at home with rthe genuine usb and charger part it would be fully charged by now
Here is a 2 amp car charger which would charge your phone in roughly an hour and a half (3.1A/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.

[Q] why lg charger charge twice faster than tab s charger?

i have lg pro 2 charger and it charge my tab s faster than the samsung charger
why is that?
check the V. My Note 2 charger charges slower because its 5.0 V, but the tab S is 5.3 V. Lg charger might be more.
Sent from my SM-G900F using XDA Premium 4 mobile app
yea you are wright so is it bad to use the lg charger?
lg v is 5 only can this damage the battary?
What you really need to compare is the current output (Amperage) output of the two. 5V or 5.3 will surely be OK. I think the Samsung wall wart is 2.1A your LG wall wart is most likely higher than that and this is really why it charges faster. It might not be good for the battery if it's too high. I don't know what the limit would be....
thank you pro
Your samsung charger is broke if the lg is Truely 2 times faster.
no not broke i tried 2 samsung charger and the same
lg charger was charging the lg pro 2 from 5% to 100% in one hour maximum
Please post the model number of LG charger.
lg travel adapter MCS-Q4UR
Bre careful i recomend u dont use another charger for ur device
How long take you charge from 0 to 100%?
Voltage is not responsible for charging time, but current. Samsung genuine charger has 2.1A current, but galaxy tab S gets only about 1770 mA (1,77A) maximum current (I measure this using voltage/current multimeter).
I have many chargers, and any of them (despite some of them have over 2A current) gets maximum current to galaxy tab S about 1.77A.
I also have I9300, and custom kernel (Boeffla, you can select own charging current from 0 to 1600mA), but i9300 takes maximum 920 mA (I don't know why they develop thi function to set current over 0.9A). Setting current over 920mA nothing changes.
I have to add, that very important is USB cable. Device can test the maximum current of charger, and when cable is not ok (for example cable is very thick) device can use a smaller than charger maximum current. You have to notice, that cable can works OK (transfer and/or charging) but can charge smaller than maximum current. Unfortunately on non-rooted devices you cannot see charging current (on device, of course you can use external multimeter)
I have many USB cables, and some of them on original samsung charger uses about 0.5A what is about 3x smaller current.

Any reason we can't use a generic or old charger ?

I have a couple of generic chargers I've been using with my note 2 for a couple of years. I realize these will charge slower than the samsung fast charge charger but is there any reason we can't use them or will they impact battery life (I would think they would increase battery life); i supect the answer is that they are fine but maybe battery technology has changed and there is some 'smarts' between charger and battery that would be damaged by these ?
No issue using your old charger except as you mentioned it won't be fast charging. I do not believe that the fast charging will hurt the battery. The fast charge only works for the first portion of the charge then the rate of charge slows to a trickle charge.
U can use any charger but i recommend to use any charger with 2amp output as it charges quick 40% in 30 mins insteas of 50%in 30 mins with original.
Original charger has two modes 9v and 5v it charges with 9v untill 50% and switches to 5v after that.
I think the unit i use is a sanyo 800ma 5 volt. I don't mind the slwo charge as long as it can't harm the battery. This is only used during travel and office; @ home I use the charger that came with the device.
You can definitely use another charger. Like said before it wont charge as fast. The adapter that comes with the phone will charge your phone at 9v instead of the normal 5v. If you use a different usb cable with the charger it will still charge at 9v. If you change the adapter, it will charge at the normal 5v whether you use the another usb cable or the one that came with the phone. The usb cable is just wires. The wall adapter is what determines how fast it will charge...

What charger for the Galaxy Tab S

Hey guys !
I just bought an Galaxy Tab S (8.4) from eBay but it came without any charger/cable.
As it is a Micro USB port, there's no real problem, I have literally tons of usb chargers available.
The problem is that most the chargers/cable I used only charged the battery at a 0.3A rate (measured with an USB voltmeter + battery app).
I know that the original charger was 5.3v 2A. I tried with some powerful 5.0v charger (3.0A/Quickcharger 3.0 compatible from Anker) but no luck so far...
Is there a specific charger/specs know to work well with this pad ?
I'm using this aukey 3.0 compatible wall charger and so far it's charging as expected
How fast does it charge ? I only get 0.3A with this charger, which charges really slow...
0.3A is 300ma i am surprised the battery charges at all at that low rate, My 10.5" draws 1700ma from my third-party chargers according to my usb monitor, I have managed to charge it as low as 1000ma from my notebooks usb port, but you need a charge only cable as a data cable will not charge at all.
John.

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