45w charger test results

[notefreak]

I found this thread on reddit. Now if I could only find a chart that was posted here on this forum regarding 25w charger

https://www.reddit.com/r/galaxynote..._source=amp&utm_medium=&utm_content=post_body

 

[SpookDroid]

That chart makes my head hurt. Title says 5min intervals, yet it's 5% battery charge. Then no explanation of what time and duration mean in his experiment data (which isn't hard to figure out, granted, but still... labels!), and if you go ahead and compare the time VS the interval, they don't exactly add up, which only makes my head hurt more (I'm sure he rounded off values at some point, but the fact remains: they don't add up).

 

[anon(7901790)]

That chart makes my head hurt. Title says 5min intervals, yet it's 5% battery charge. Then no explanation of what time and duration mean in his experiment data (which isn't hard to figure out, granted, but still... labels!), and if you go ahead and compare the time VS the interval, they don't exactly add up, which only makes my head hurt more (I'm sure he rounded off values at some point, but the fact remains: they don't add up).

I think he meant 5% intervals.

It charged from 0 to 5% in 2m 19s then 1m 41s it was 10%

In other words it went from 0 to 10% in about 4m. (2m 19s + 1m 41s = 4m)

Does that clear it up?

 

[CKwik240]

I'd actually like to see it plugged into a power meter while charging so we can see the real time charge rates at each interval.

 

[SpookDroid]

I think he meant 5% intervals.

It charged from 0 to 5% in 2m 19s then 1m 41s it was 10%

In other words it went from 0 to 10% in about 4m. (2m 19s + 1m 41s = 4m)

Does that clear it up?

Like I said, not hard to figure out what the data refers to, it's just that it's not properly labeled (Total Elapsed Time vs Time Delta or something like that would have been better suited).

And again, some of the numbers don't add up (pretty sure because of rounding if he was using Excel and inputting milliseconds into the table or something), but for instance... to go from 0 to 5%, elapsed time is 2.20, yet the delta is 2.19 (and that's the very first data set). Scroll down and from 15 to 20 percent it took 2.03, yet the elapsed time jumped from 6.03 to 8.07 (a 2.04 delta).

 

[SpookDroid]

I'd actually like to see it plugged into a power meter while charging so we can see the real time charge rates at each interval.

Bader did it briefly on this article, but yeah, would be cool to have the whole enchilada from 0 to 100% charge.
https://www.androidcentral.com/editors-desk-charging-arm-and-leg-and-note-10

 

[anon(7901790)]

Like I said, not hard to figure out what the data refers to, it's just that it's not properly labeled (Total Elapsed Time vs Time Delta or something like that would have been better suited).

And again, some of the numbers don't add up (pretty sure because of rounding if he was using Excel and inputting milliseconds into the table or something), but for instance... to go from 0 to 5%, elapsed time is 2.20, yet the delta is 2.19 (and that's the very first data set). Scroll down and from 15 to 20 percent it took 2.03, yet the elapsed time jumped from 6.03 to 8.07 (a 2.04 delta).

Yeah. I see what you mean. It's also still subjective, because we don't know what the conditions were. He didn't explain them at all. For example was the phone turned on, is it a brand new phone with factory defaults, etc.

 

[notefreak]

At least he shared his findings to save some people some money.

 

[dario12v]

I found this thread on reddit. Now if I could only find a chart that was posted here on this forum regarding 25w charger

https://www.reddit.com/r/galaxynote..._source=amp&utm_medium=&utm_content=post_body

I'm completely lost on this one
1 hour and 3 min on the 45 w?
So it takes longer to charge with a 45 watt charger than the 25 w?
Jimmy s primo tested the 25 watt charger , from 0-100 it took 1 hour and 2 min
https://youtu.be/v62eymVAh0k
Please someone make some sense out of this!

 

[notefreak]

I guess 45w you use to charge to 80% in 40 minutes then go. It was also said this is not good for the battery if used too much.

 

[ClintRo]

I wonder if the meter in between the cable and the phone causes some issues with the phone seeing that the cable and brick are compatible.

 

[ClintRo]

I'm completely lost on this one
1 hour and 3 min on the 45 w?
So it takes longer to charge with a 45 watt charger than the 25 w?
Jimmy s primo tested the 25 watt charger , from 0-100 it took 1 hour and 2 min
https://youtu.be/v62eymVAh0k
Please someone make some sense out of this!

He used the 25 watt charger in this video. About 1 hour for a full charge is in line with all other test I have seen.

 

[Mooncatt]

I'm completely lost on this one
1 hour and 3 min on the 45 w?
So it takes longer to charge with a 45 watt charger than the 25 w?
Jimmy s primo tested the 25 watt charger , from 0-100 it took 1 hour and 2 min
https://youtu.be/v62eymVAh0k
Please someone make some sense out of this!

To start with, every battery will have a different capacity. Two coming right off the line with the same specs could have two different real capacities. Then factor in environmental and storage variables that happen before it gets into your hands, and the capacity could've dropped more. In fact, Battery University noted in their article on prolonging batteries that all of their brand new, un-used cells they tested had less than their advertised capacities. They also wrote this article on charging that has a very important but often overlooked tidbit on charging speeds.

Increasing the charge current does not hasten the full-charge state by much. Although the battery reaches the voltage peak quicker, the saturation charge will take longer accordingly. With higher current, Stage 1 is shorter but the saturation during Stage 2 will take longer. A high current charge will, however, quickly fill the battery to about 70 percent.

https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

Basically faster charging only benefits you if your battery is very low on charge. A full 0-100% charge wouldn't see a big difference. Combine that with the possibility of those two phones having two different real capacities, and it's conceivable to see that sort of skewed result. A better test would be using both chargers on the same phone, but that may become partly skewed if the battery gets damaged from being drained so low during the test.

 

[james702283]

My expected ship date on the Samsung 45 w charger got pushed back today from Sept 13th to the 26th.