anyone know why my iphone 4s charges significantly faster than my samsung galaxy s2?

stevelam

macrumors 65816
Original poster
Nov 4, 2010
1,215
3
is it the difference in charging ports?
micro usb vs apple proprietary charger?

granted the samsung s2's battery capacity is a little larger (1650 mAh compared to iphone 4s 1432 mAh) but the difference in speed is huge. without any scientific testing and just from general observation from owning both, i'd say the iphone 4s probably charges about 5x faster.

this is from my laptop usb to phone.
 

rever3nce

macrumors 6502a
Apr 6, 2011
567
5
I'm just messing with ya... but yes it does have to do with 30 pin connector. Iphones do tend to charge a lot faster than most others. I know for a fact though that through a USB cable it takes up to 20% longer to fully charge on any phone
 

Prof.

macrumors 601
Aug 17, 2007
4,851
614
Chicago
The iPhone charges from 0 to 89% rather quickly, in like an hour (maybe 90 mins) or so. It then starts trickle charging when it hits 90% and continues to charge this way until it is fully charged. This insures an accurate, full charge.
 
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sentinelsx

macrumors 68010
Feb 28, 2011
2,004
0
Because sometimes companies like to make stupid decisions. They capped the transfer rate to very low amount (i forgot the numbers but there are threads on this floating in xda and anandtech with exact specs) and even lower when connected to a computer. Since it cannot be bypassed you are stuck with a slower charge than the device is actually capable of.
 

SurferMan

macrumors 65816
May 14, 2010
1,267
51
South FL
The above post is correct, the transfer rate is capped on many androids, no one knows why except a repeated rumor is to keep heat down, as others have developed kernals to increase the rate with no issues. Plus the batteries are generally bigger then the iphones' as well, I think the iPhone can hit 1 amp charging to an outlet if I'm not mistaken, where I think my S2 is capped at 650 or so?

From dead to 100% my 4 takes about 2-2.5 hours, my i777 S2 about 3-3.5 hours when plugged into an outlet. If on usb to a computer about the same difference (an hour or so).
 
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walie

macrumors 6502a
Nov 15, 2010
676
2
The above post is correct, the transfer rate is capped on many androids, no one knows why except a repeated rumor is to keep heat down, as others have developed kernals to increase the rate with no issues. Plus the batteries are generally bigger then the iphones' as well, I think the iPhone can hit 1 amp charging to an outlet if I'm not mistaken, where I think my S2 is capped at 650 or so?

From dead to 100% my 4 takes about 2-2.5 hours, my i777 S2 about 3-3.5 hours when plugged into an outlet. If on usb to a computer about the same difference (an hour or so).
correct, it has nothing to do with the type of cable
 

vitzr

macrumors 68030
Jul 28, 2011
2,766
3
California
Apparently slower is better
Yes, it's true. Slower charging generates less heat. Yet that said, it's largely the choice of the manufacturer that plays a part in how fast they want their device to charge. The difference in charging times between Apple & Android is not dramatic enough to impact the long term life of the battery, when most users only keep a phone for two years or so. Apple has always been very good at optimizing battery life vs charging rates, therefore they usually provide the best solution for their iPhones & Laptops.
 

cole01

macrumors 6502
Dec 29, 2008
304
0
this is one of the things that I absolutely couldn't stand about the GSII, succcch a slow charger
 

aphexacid

macrumors 6502a
Jul 31, 2007
925
20
Chicago
it has nothing to do with the damn cable.

Countless reviewers have said that for some reason, these samsungs take a long time to charge. The HTC's are normal.

Latest review i can think of is Aaron from phonedogs review of the SGS2. He talks about the SLOW charging in samsungs