Develop Bugs

[Q] Charging Speed - Different from a/c than from USB?

So I was wondering: is there a difference in charging speed between the a/c wall charger and charging from my computer's USB port? Also, what's the difference between different chargers? For example, the Desire comes with a charger that puts out 1 amp. My girlfriend's BlackBerry has a micro USB charger as well, but the output is 700 mAh, or 0.7 amp. I've seen chargers ranging from 500 mAh (0.5 amp) to 1200 mAh (1.2 amp). How does this equate to charge time? Does it even? Or does the phone regulate the charge rate?

Benny_L said:
So I was wondering: is there a difference in charging speed between the a/c wall charger and charging from my computer's USB port? Also, what's the difference between different chargers? For example, the Desire comes with a charger that puts out 1 amp. My girlfriend's BlackBerry has a micro USB charger as well, but the output is 700 mAh, or 0.7 amp. I've seen chargers ranging from 500 mAh (0.5 amp) to 1200 mAh (1.2 amp). How does this equate to charge time? Does it even? Or does the phone regulate the charge rate?
Click to expand...
Click to collapse
You've pretty much answer your own question!
The current supplied by a charger/USB port determines how fast it can charge the battery, which is why the wall charger (1amp) charges much faster than a PC USB port (0.5 amps).
Regards,
Dave

It's almost completely logical.. say you have a 1.5A battery (1500mA) and a 500mAh charger (ie USB) then it will take 3 hours for it to charge but with a 1000mAh charger it will take an hour and a half.
Can't really explain it more than that, so hth.

Well , Yes and No
This is only partly true ......
If you charge it on the PC , max output is 0.5 amps , and data is possible while charging .
Now with Desktop and car charger , the amp can be anything the manufacturer likes but you have to keep the following in mind :
USB Specs state the following :
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In Battery Charging Specification,[32] new powering modes are added to the USB specification. A host or hub Charging Downstream Port can supply a maximum of 1.5 A when communicating at low-bandwidth or full-bandwidth, a maximum of 900 mA when communicating at high-bandwidth, and as much current as the connector will safely handle when no communication is taking place; USB 2.0 standard-A connectors are rated at 1500 mA by default. A Dedicated Charging Port can supply a maximum of 1.8 A of current at 5.25 V. A portable device can draw up to 1.8 A from a Dedicated Charging Port. The Dedicated Charging Port shorts the D+ and D- pins with a resistance of at most 200Ω. The short disables data transfer, but allows devices to detect the Dedicated Charging Port and allows very simple, high current chargers to be manufactured. The increased current (faster, 9 W charging) will occur once both the host/hub and devices support the new charging specification.
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
So if your Desire ( Yes , the Desire supports these specs ) detects the short , it will switch to fast charging mode otherwise it will limit the charging current .
Unfortunately , there's no way to know , just by looking at a charger, if it respects the specs or is just a low cost 5V powersupply . I've encountered quite a few ( mostly lowcost) desktop and car chargers that are rated between 1 and 2 amps , but still take bl**dy ages to charge the phone . Checking those with a measuring tool , you usually see the data pins are "Not Connected" instead of being shortened :-(((
Final Word .... don't try to save some money on a cheap charger , you'll regret it Genuine HTC works great , others do the same , but don't expect a $1 charger from Hongkong or whereever to do it !

These are the theoretical specs. Keep an eye on charger efficiency ratings and battery charge absorption won't be 100% in any case. Also bare in mind the charge is not linear, it will trickle after approx 80-90% with this phone.
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- Sent via my HTC Desire -

th3 said:
These are the theoretical specs. Keep an eye on charger efficiency ratings and battery charge absorption won't be 100% in any case. Also bare in mind the charge is not linear, it will trickle after approx 80-90% with this phone.
-----------------------------------
- Sent via my HTC Desire -
Click to expand...
Click to collapse
Ya, I noticed the charge slows down considerably for the final 10-15 %
I find myself charging my Desire more than I actually use it, lol.

I found now the answer to this problem: I use a Nokia charger (5v and 890 mA) with a microusb adapter. You can find one on eBay at ~2$
Now it takes about 2 hours from 20% to 100%
Lets hope nothing wrong happens to my precious Desire

look here for a method to charge at ac speed from usb, explains a few things too.

Wall and car charger

Can anyone give me some links from ebay to good wall charger (EU wall plugs doesn't fit here in Brazil) and good charger for car?

Souldat said:
Can anyone give me some links from ebay to good wall charger (EU wall plugs doesn't fit here in Brazil) and good charger for car?
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Click to collapse
dont buy charger from ebay..)) go to local shop and get one universal for samsung.. the charger is the same as for SGS1 mate....
second thing is the same - for car charger...just buy a charger with micro USB even for HTC or NOKIA..they are all the same...
dont make things complicated...

W.r.t. car chargers: They are not all the same !
The difference is in the charge current they can support.
There are 500 mAmp versions;
There are 1000 mAmp (1 Amp) versions;
And then there are a few 2000 mAmp (2 Amp) versions.
I would at least get a 1 Amp version to be sure that charging is more than an active SII would alreday consume (GPS, Bluetooth,...)
I myself bought a 2 Amp version.
(Note the standard Samsung Wall-plug delivers 700 mAmp.

alright thanks!!!

andrek64 said:
W.r.t. car chargers: They are not all the same !
The difference is in the charge current they can support.
There are 500 mAmp versions;
There are 1000 mAmp (1 Amp) versions;
And then there are a few 2000 mAmp (2 Amp) versions.
I would at least get a 1 Amp version to be sure that charging is more than an active SII would alreday consume (GPS, Bluetooth,...)
I myself bought a 2 Amp version.
(Note the standard Samsung Wall-plug delivers 700 mAmp.
Click to expand...
Click to collapse
Have you used the 2A charger with the SGS2? If so did you experience any problems like overheating, stopped working etc?
How about charging time is it any faster?
I'm thinking of using my old HTC charger 5v 2a and would like to hear your thoughts
Thank you.

I always used 1A 5v car charger for every phone I owned. but with gs2, it made me sick. overvolting everytime, both with 1A and 250A (btw better 250..) and it causes freezing.
more A isnt better, our galaxy has an internal chip wich brings A to 0.7A anyway, even with 10A input.
buy an original samsung car charger

thanks for the reply!

I just bought a 2A charger. I'll let you know my experiences.

Please do! Thank you.

I too would be interested to hear how your 2A charger goes. Especially for long journeys (e.g 2 hrs+) with GPS on the whole time!

I just bought a 1200mA wall charger
It's Nokia's Fast Micro-USB Charger (AC-10) for 10 euro inl. shipping from ebay
l let you know my experiences

I have a 2 A car charger. Originally sold for the Ipad2.
Works well - no freezing, but the phone still tends to discharge very slowly whilst using Sygic with GPS on and bluetooth. This is a common issue on the SGS2 and is NOT solved by a high current charger. It seems that there is a limit to how much current the phone can take (possibly software implemented) and there is nothing to be gained between a 1A and a 2A charger

Thank you Mahniex for taking the time to post your observations.

Thank you Mahniex for your testing,
I also have a 1A car charger, but same problem here. After 200 Kms of driving with GPS on and BT on, the battery is draining so fast from 100% to 0%, that I can't use it a lot.
Maybe, there is also a problem with the cable. I use a Sync/charge Cable. Maybe if I could find one with only charging capabilities, it could be better.
I don't exactly know...

buying new sgn charger

Recently, my sgn n7000 charger(1yr old) got damaged.
I am looking to buy new charger of same model, but after searching a lot, i coudnt find a new genuine charger online, most of them are boxed and loosely packed.
i got some gud deal for a charger but its 700ma, it will take a lot of time to charge..
While searching, i got at these product
http://www.ebay.in/itm/Buy-Online-S...?pt=IN_Mobile_Accessories&hash=item3384a4ebb8
but on the samsung website, the note n7000 is not in the compatible list.
i wanna know, will it charge my note properly or not. Will i t damage my battery..!
or else pls give some link whr i can get genuine charger.

charger
The charger looks like an indian version of the one my daughter received with her galaxy s4. White is the colour of her phone and the colour of her charger, it also was 5v at 2A. To my knowledge the charging of the battery within the phone is controlled by the phone and as long as it is supplied with its minimum requirement of 5v. it will charge at whatever current it can within the control of the power management in the phone.
Hope this helps ? I did look at the samsung website in india and they had power units for sale. I dont know where you are ?

Samsung India has 700ma chargers listed..
And do u charge ur note with that one..? Us thr any problem.?

charger
No mine is a 5v 1A samsung charger. I also have an incar charger which is a standard usb charger for any make of phone and that supplies 5v at 1A. I also have a Yiboyaun unit from china which charges just the battery, I have 3 additional batteries I use and charge with this unit from china. I have had this setup for more than a year with no problems.

You can charge N700x with the Note 2 charger (which puts out max 2A). It charges slightly faster than the original Sammy 1A charger/cable. It's perfectly safe because the phone will not take in more current than it's configured.

seowphm said:
It charges slightly faster than the original Sammy 1A charger/cable. It's perfectly safe because the phone will not take in more current than it's configured.
Click to expand...
Click to collapse
If it charges faster than 1A its not limiting the input. The note 1 battery is made for 1A chargers. Using 2A will limit the life span of the battery.

Wall Adapter [Q]

Could you guys recommend me a wall adapter?
I heard that i should get a 1500 mA one, but the best i found on amazon is Belkin Universal USB Wall Charger EU which is a 1000 mA ( i'm not allowed to post links yet, but if you search it it's impossible not to find it). I have to tell you that i can only buy it from the UK and that it needs to be a standard EU plug.

The one amazon.de sent me charges fine, the only issue is that it turns on my device if i try to charge it when it's off. The charger is a 5v 1A.
My iPhone 5S wall charger is also a 5v 1A but it "behaves better" i guess, because when my moto G is off wheni plug it to the iPhone 5S wall charger it doesn't turn on my phone automaticaly, it charges fine and the moto g only shows the battery image on screen.
Both charge ok (1A 5v), but if i want to charge my phone when it's off i guess some chargers won't be able to do that. Maybe it's an voltage accuracy.
Sent from my iPhone using Tapatalk

I use adapter from my Nexus 7, otput is 5V 2A and no problems.

Any wallcharger will do as long it is 500-1500mA but i think anything over 1500mA can be used, but the device will limit it to 1500mA.
But i wouldn't recommend anything over 1500mA as it could damage the device.
The higher the mA is the faster it will charge.
Currently im using the Sony Ericsson Live Dock DK10 to charge my Moto G but im looking for a more powerful charger.
Press Thanks if i have Helped!

MahaDEVELOPER said:
Any wallcharger will do as long it is 500-1500mA but i think anything over 1500mA can be used, but the device will limit it to 1500mA.
But i wouldn't recommend anything over 1500mA as it could damage the device.
The higher the mA is the faster it will charge.
Currently im using the Sony Ericsson Live Dock DK10 to charge my Moto G but im looking for a more powerful charger.
Press Thanks if i have Helped!
Click to expand...
Click to collapse
Additional amperage does not harm the device, only incorrect voltage will. The phone will only draw as much amperage as the charging chip allows.
Having said that, keep in mind that quick charging will wear out the battery faster than a slower charge.

I'm using a 750mA, 5V Blackberry charger for mine - from empty it takes about 2hrs 45mins to fully charge, so a higher amperage should be pretty fast. Doesn't boot the phone if the phone is off.

i bought this one
http://www.amazon.com/gp/product/B007ZN5LE0/ref=oh_details_o00_s01_i00?ie=UTF8&psc=1
didn't receive it yet

In case anyone is wondering whether the old Apple wall charger is working or not (the one from circa 2007. I broke my other decent wall adapter...), it's working almost perfectly. It's correctly recognized as wall charger and ~1A is drawn from. That's quite surprising, It had always been wrongly detected by all the phones I tried to charge with it. The only drawback is that the device can't be charged when off, the device will simply boot as soon as it's plugged. This doesn't happen with proper wall chargers (at least on JB, I don't know if something changed with KK).
To know if a wall charger is detected as such, dial *#*#4636#*#* and see if it says "USB" instead of "CA" in the battery informations. Usually USB means lower current (~500mA) and kernel wakelocks (not always this one, it depends on how the charger is detected). That's not good.
You can also get the amount of current flowing though the battery using CurrentWidget (look for it on the Play Store) or reading the files in /sys/class/power_supply/battery/.

nothing happens if the moto g connect a charger that 2.0a galaxy s4

The Asian dual sim version comes with a charger with a hard wired cable, rather than a micro USB cable (and interestingly, its only got 2 wires connected from what I can tell). Its 500mA, and mine uses a UK plug. I've also tried it with a HTC charger (the moto charger has a VERY long, unwieldy cable) thats also 500mA and it works too. There's no real need for a higher amperage, and it does tend to charge pretty fast.

MahaDEVELOPER said:
Any wallcharger will do as long it is 500-1500mA but i think anything over 1500mA can be used, but the device will limit it to 1500mA.
But i wouldn't recommend anything over 1500mA as it could damage the device.
The higher the mA is the faster it will charge.
Currently im using the Sony Ericsson Live Dock DK10 to charge my Moto G but im looking for a more powerful charger.
Press Thanks if i have Helped!
Click to expand...
Click to collapse
Hi, is it possible to use the Live Dock to connect USB devices on the Moto G?
Thanks in advance!

I am using the adapter of iphone 5s, it's a 1A, is it good or not?

stiiiv19 said:
I am using the adapter of iphone 5s, it's a 1A, is it good or not?
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Why nobody ever read dedicated FAQs?

the alanct
matmutant said:
Why nobody ever read dedicated FAQs?
Click to expand...
Click to collapse
thx mate

chocris said:
nothing happens if the moto g connect a charger that 2.0a galaxy s4
Click to expand...
Click to collapse
Nope I'm using it. Fast charging. Awesome...
Sent from my XT1033 using Tapatalk

1,5A charger on HTC One M7

I'm thinking to buy a new charger for my phone since it was broken. Do I need to buy the default (1A) or should I go to 1.5A?

isssaputra said:
I'm thinking to buy a new charger for my phone since it was broken. Do I need to buy the default (1A) or should I go to 1.5A?
Click to expand...
Click to collapse
AFAIK, the phone will only take a maximum of 1A. It doesn't help or hurt to go more though. So, if the 1.5A charger is cheaper, I'd go that route since you could then use it on other devices that require more juice ("future proofing").

isssaputra said:
I'm thinking to buy a new charger for my phone since it was broken. Do I need to buy the default (1A) or should I go to 1.5A?
Click to expand...
Click to collapse
Go with any Quick Charge charger. I personally have the Quick Charge 3.0 Aukey 2 port because I also have an HTC 10. I can tell you that it will charge the phone faster than the stock charger. The M7 has Quick Charge 1.0 technology but the stock charger wasn't a quick charge charger. With with a quick charge charger you can get a fill charge in a little over a hour 40 mins.

The HTC M7 is not on Qualcomm quick charger 1.0 compatibility list.
https://www.qualcomm.com/news/onq/2...-charge-10-less-time-charging-more-time-doing
John.

BlitzWolf™ 4.8A 24W Dual USB Travel Wall US EU Charger With Power3S Tech For iPhone iPad Samsung.
Available in black or white.
USA http://www.banggood.com/BlitzWolf-2...th-Power3S-Tech-For-iPhone-iPad-p-988945.html
EU http://www.banggood.com/BlitzWolf-2...ith-Power3S-TechFor-iPhone-iPad-p-987689.html
Review http://lygte-info.dk/review/USBpower BlitzWolf 24W Dual wall charger UK.html
Or
[Qualcomm Certified] BlitzWolf® BW-S6 QC3.0+2.4A 30W Dual USB Fast Charger US Adapter (Qualcomm Quick Charge 3.0)
EU http://www.banggood.com/Qualcomm-Ce...r-EU-Adapter-With-Power3S-Tech-p-1047935.html
USA http://www.banggood.com/Qualcomm-Ce...r-US-Adapter-With-Power3S-Tech-p-1047936.html
Review http://lygte-info.dk/review/USBpower BlitzWolf 30W QC3.0 Dual-Port USB Adapter BW-S6 UK.html
John.

You might as well stick to original charge because fast chargers can mess up the battery.

b$ mate. Charging controller is in the phone, not in the charger. You can use even 100A charger, but phone will limit charging current go to the batter as it needs.
Mike