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Hand-cranked chargers

Has anyone used a hand-cranked charger? I have a Brookstone hand-cranked flashlight/radio that can charge phones. I'm considering getting an adapter to charge my Tilt but I don't know if it can handle it. It says it can output up to 600mA. I've heard bad reports of other chargers with dumb phones but nothing of this one. It seems unlikely this can keep a power-hungry Kaiser charged. It also outputs 6 volts. I hope this doesn't fry the phone.
Edit: I meant 600mA

Any estimates on how long it would take to reach full battery charge?
A couple of hours?
Excellent for weight loss, especially if you use 3G...

The standard Kaiser or Hermes wall charger is rated at 1A (1000mA), and a powered USB port outputs 500mA. As some people have problems charging from USB - particularly after completely discharging their batteries, then I'd think that 500mA is the minimum power required to charge.
If you install one of those programs which displays battery power you'll probably find that the power draw is much higher than 6mA (even in standby) so all you'll do with the hand cranked charger is slightly reduce the rate at which the battery is discharging.
Looking at a 1350mAh battery, this would take a minimum of 9 days and 8 hours to charge the battery from flat if it isn't being used - great workout but hardly worth it

I got a cheapo one from some gareg... AA branded thing for a fiver, flash light thingy to... five mins of winding gave a one percent increase in battery, but then if your really stuck it could be a good thing... only cost a fiver too!

What charges faster, 5v3a or 9v1.7a

Hey guys, I plugged a 5v3a usb-c charger into my note 9 and it detects it as fast charging. I know a bit about volts and amps and how they work, but in this case what would charge the note 9 faster? The included qc2.0 charger going at 9v or the usb-c charger at 5 volts 3 amps?
Would the 5v3a be better anyway due to less heat generation? Or does the bundled Samsung charger negotiate better with the note 9 chipset and provide a faster charge?

Short answer 9v 1.7a. The device will only allow that as the max input.

So why does it detect a 5v3a as fast charging?

djleez82 said:
So why does it detect a 5v3a as fast charging?
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If I am not mistaken a charger capable of supplying 5v at 2A or above will be fast, when compared to 5V 500mA from a normal USB port
Quick chargers use higher voltages which can provide more charging power than the 7.5W typically provided by 5V 2A.
QC 2.0 can provide up to 36W over micro USB C

I happen to have two Note 9s. I'll run them both down this weekend to say 40%. Then I'll charge them up. One with the 5V 3A Pixel charger, and the other with the Samsung charger. Which by the way, the included Samsung charger is rated 9V 1.7A OR 5V 2A. So I guess it switches voltage based on what the phone accepts.
If I remember right, my Pixel charger always seemed to be the faster of the two options, but I'll test it side by side this weekend.

I had read in some places that 5v3a will charge faster since it's lower volts so less heat generation and less resistance. This will be interesting to see

So I tested two Note 9s side by side. One is a 128GB T-Mo model and the other is a 512GB ATT model. I discharged them both to 41% and plugged them in side by side and monitored it using AccuBattery.
I used the stock Samsung 9v 1.7a charger and the stock Pixel 5v 3a charger.
The results? They charge at the same speed. Or at least very close. Within 200ma of each other.
I let them charge for a few seconds screen on, and at first they were both charging station 2600-2800ma. But once they past 60% they both dropped to 1200-1400ma with the screen on.
Screen off, they both consistently charged at 2600-2800ma.
Then I switched the chargers between the two phones, and I discovered that 200ma difference is because of the phone itself. No matter which charger I used, my 128GB T-Mo charged approx 200ma higher than the 512GB ATT. I'm guessing it's just a difference in the battery itself, as there are always manufacturing tolerances.
The 128GB T-Mo wound up fullu charging just a couple minutes faster than the 512GB ATT. But it's not a significant difference.
I was actually supposed to have a 512GB U1 model here today, but it got delayed in the mail. My original intent was to pit the two 512GBs against each other, but memory and storage shouldn't effect charge speed.
My conclusion: it doesn't matter which charger you use. To be on the safe side, always use the factory Samsung charger. But the Pixel charger will also work, and will charge it just as fast.

Awesome stuff. By any chance was there anything in the settings that showed which one was the hottest during charging was there? Cause the coolest one would be the best one in my opinion

djleez82 said:
Awesome stuff. By any chance was there anything in the settings that showed which one was the hottest during charging was there? Cause the coolest one would be the best one in my opinion
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Click to collapse
There is a temperature monitor in Accubattery but I didn't think to monitor it. I can tell you that I handled both phones during the charge process and neither felt warmer than the other. Certainly not enough to affect charge rate or overall battery health.

Interestingly, when I said my T-Mo phone hit full charge a few minutes faster than the ATT, I was wrong. I had based that on the estimate of when it would reach 100%
I later checked, and both phones hit 100% and the green LED came on indicating full charge within a few seconds of each other. So both chargers really did charge at the same speed.

My Exynos NOTE9, never charging with 9v model, only 4v-4.5v....

hinnn said:
My Exynos NOTE9, never charging with 9v model, only 4v-4.5v....
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I may be wrong, but I would guess that's a limitation of the Exynos processor. Quick Charge is a Snapdragon feature.
Someone else who knows more about the Exynos processor may correct me though.

Mr. Orange 645 said:
I may be wrong, but I would guess that's a limitation of the Exynos processor. Quick Charge is a Snapdragon feature.
Someone else who knows more about the Exynos processor may correct me though.
Click to expand...
Click to collapse
quick charge is a samsung feature regardless of chip.

Just by electrical equations 9 V x 1.7 A = 15.3 W, and 5 V x 3 A = 15 W so without efficiency losses they're pretty close in capacity
Sent from my SM-N960U1 using XDA Labs

15 watts is 15 watts. Yea there is room in there for the internal resistance of the battery at a higher voltage/lower current vs lower voltage/higher current, but it's lost in the noise when it comes to other factors such as manufacturing tolerances of the battery and USB cable quality. In my opinion, there is really two things you can do to have your phone charge as fast as possible. Keep it cool while charging, and use a high quality USB cable (and charger of course).. the shorter, usually the better which lowers the resistance and gets the most power (watts) into the phone.
So if you have brand "Y" cable and brand "X" cable, and you know Y is of higher quality, always get the shortest cable they sell in that brand. I find factory cables are not always of the highest quality.
So Mr Orange, when you ran that side by side test, are you sure you were using identical cables. The difference you saw of 200mah might not have been the phone, but could have been from cables.

Tornlogic said:
15 watts is 15 watts. Yea there is room in there for the internal resistance of the battery at a higher voltage/lower current vs lower voltage/higher current, but it's lost in the noise when it comes to other factors such as manufacturing tolerances of the battery and USB cable quality. In my opinion, there is really two things you can do to have your phone charge as fast as possible. Keep it cool while charging, and use a high quality USB cable (and charger of course).. the shorter, usually the better which lowers the resistance and gets the most power (watts) into the phone.
So if you have brand "Y" cable and brand "X" cable, and you know Y is of higher quality, always get the shortest cable they sell in that brand. I find factory cables are not always of the highest quality.
So Mr Orange, when you ran that side by side test, are you sure you were using identical cables. The difference you saw of 200mah might not have been the phone, but could have been from cables.
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Click to collapse
Of course not. It would've been impossible to use identical cables. I used the factory cable for the factory Pixel charger, which is USB C on both ends. And I used rrh factory cable for the factory Samsung fast charger, which is USB A to USB C.
Plus, my 128GB T-Mo Note 9 showed it was charging 200ma higher no matter which cable I used. As I said in my post, I switched them back and forth a few times to account for differences in the cables/chargers. I got the same the results from both phones with either cable.
But either way, if you read my follow up, they both charged to 100 at the same time, so ultimately it was a complete wash.

Question Can we charge S21U with 40W chargers?

Hi to all,
Can we charge S21U with 40W chargers? They are a lot chargers like Huawei, Xiaomi and etc... with 40W and more.

I believe the answer is yes - or at least probably. Most of those newer chargers are "Smart" in that they only provide the volts and amps that are needed by the device being charged. I may be wrong about that, but I don't think so - I don't think you have anything to worry about.

isko01 said:
Hi to all,
Can we charge S21U with 40W chargers? They are a lot chargers like Huawei, Xiaomi and etc... with 40W and more.
Click to expand...
Click to collapse
Pretty sure you can, I use a 45 watt "smart" charger on my NOTE 20 Ultra without any issue.

You can use any charger that supports PD (power delivery), AFC or QC2.0
Any 45 watt USBC charger out there is going to be PD standard so you'll be fine.
The downside is, it'll still only charge at 25 watts.

I am charging my s21U with an 40w charger, works without problem. not using 40 watts of course, but its working.

The phone, all phones in fact, will ONLY charge at it's highest speed the phone allows itself to receive, the charger doesn't matter, it can be lower or higher than what the device is recommended for. A lower power charger will just take longer to charge the phone, a higher power charger will just not charge at it's full power if the phone won't accept the full power from the charger.
I've been using the 90w charger from my HP Spectre X360 my S20 Ultra since I got it without a single issue, I still get about 2 days of use per charge on that thing, and now I've been using the same laptop charger on the S21 Ultra and it works just fine.
The phone fast charges normally, doesn't get super hot, works just fine, and I only need to keep laptop chargers around the house, it's great haha

I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?

Tmel14 said:
Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?
Click to expand...
Click to collapse
That's the charger I've been using w/ S21Ultra (25W from N10+) and I figured out I won't be needing anything bigger then that. Thanks to Samsung 'super fast charging' the 5Ah battery on s21U charges faster then 3.8mA Pixel 4a5G battery(with the same charger). +/- 1 hour and done!

Question Fast charging, and superfast charging

I have the Samsung 25w charger, and when using it it appears the phone will only either cable charge or superfast charge. It wont also fast charge. I want to maximize the battery life span of the phone, and cable charging is inconveniently slow, and I figured that fast charging would be a happy medium between that and maxing it out. I was under the impression that it's the phone that dictates the rate of charge it will accept from the brick, and the brick only determines the maximum deliverable current. If I understand correctly, we can use samsung's 45w charger, but the phone will obviously only allow 25w from it. I'm puzzled why when using the 25w charger the phone can't just accept 15w when set to only fast charge. Is this a bug?

Hi,
You might plug in your phone, Go to Parameters, Section Battery, Advanced Battery, and activate Super charge and superfast charge in order using fast and supercharge with your 45W charger !

Yes, I've done that. The 25w charger will only super fast charge, but won't just fast charge. I would have thought it could either one, whichever I have it set to do.

if you want fast charge ..... deactivate superfast charge should be the solution ! Isn't it ?

Probably a firmware/software glitch.
Fast charging will not enable if battery temp is too low.
To avoid Li plating the battery temp should be a minimum of 72°F or higher, the preferred minimum is 80°F.
Using the 45 watt brick may shorten battery life.
Fast charging with the 25 watt brick appears to do little damage.
Li's prefer brief, frequent midrange charges ie 40-65%. Avoid discharging below 30% and charging beyond 90% although 80% is a better top limit.

fission6606 said:
if you want fast charge ..... deactivate superfast charge should be the solution ! Isn't it ?
Click to expand...
Click to collapse
No, if you only activate fast charge (with superfast deactivated) and use the 25w brick, the notification in the shade says cable charging, and that takes like 2hrs to charge the phone.

ac42 said:
No, if you only activate fast charge (with superfast deactivated) and use the 25w brick, the notification in the shade says cable charging, and that takes like 2hrs to charge the phone.
Click to expand...
Click to collapse
That doesn't sound like fast charging is active. It should gain about 2%@minute through most of its range except the top end where it goes to about 1%@minute.
When this doesn't work correctly it's a true pain to troubleshoot. My 10+ started dropping out of fast charging prematurely. A new 25 watt brick/cable and trying a lot of other remedies still hasn't fully restored it.

I'm curious if anyone here has a 25w brick that could confirm if this behavior is present globally, or if this is something just on my device? Only activate fast charging in the battery settings, plug the phone in with the 25w charger, and look in the notification shade and see what the charge rate is tagged as. I'd be grateful if someone would confirm this.

blackhawk said:
Probably a firmware/software glitch.
Fast charging will not enable if battery temp is too low.
To avoid Li plating the battery temp should be a minimum of 72°F or higher, the preferred minimum is 80°F.
Using the 45 watt brick may shorten battery life.
Fast charging with the 25 watt brick appears to do little damage.
Li's prefer brief, frequent midrange charges ie 40-65%. Avoid discharging below 30% and charging beyond 90% although 80% is a better top limit.
Click to expand...
Click to collapse
I have noted that you practise the same charging procedures as I have done for several years (and you obviously have done as well). With my Note9 and S8 + I used to not let it drop below 40% if I can avoid it and also not go above 80%. All this is fine and most of this we all probably learned from Battery University and Isadore Buchmann. That all said, and I am really not sure if I am keeping this phone - Decision today or tomorrow - my question comes to the matter of calibration. When I received this phone some 14 days ago I charged it to 100% but thereafter did not run it down to zero but kept it above 40% the whole time. The question I put to you (and others can learn from your response) is there a need to "calibrate" the device initially (ie run down to say 10% for example once a month) as was suggested by Buchmann probably a few years ago?

blackhawk said:
That doesn't sound like fast charging is active. It should gain about 2%@minute through most of its range except the top end where it goes to about 1%@minute.
When this doesn't work correctly it's a true pain to troubleshoot. My 10+ started dropping out of fast charging prematurely. A new 25 watt brick/cable and trying a lot of other remedies still hasn't fully restored it.
Click to expand...
Click to collapse
You and I discussed this earlier. Do you think it is the port that has become damaged? Part of the reason for my getting the wireless charger is my Note 9 is very erratic when it comes to fast charging. Cleaning out the port with a toothbrush/compressed air. rebooting...wiping cache partition, new cable etc never truly fixed it for me. I do feel that when first plugging in the S21 ultra (before going wireless) the connection seemed a lot firmer.

ac42 said:
I'm curious if anyone here has a 25w brick that could confirm if this behavior is present globally, or if this is something just on my device?
Click to expand...
Click to collapse
It does appear to be related to the Samsung 25w brick. I have the one that came with my S20U. It will "Super fast charge" my S21U no problem. If I turn off super fast charging in the phone, it only says "charging" when plugged in, and with my phone @ 65%, it said it would take well over an hour to charge (forgot the exact time). Then I took my phone w/o changing any settings to a generic 18w QC3 brick, and it said "fast charging", and said it would take 44 mins to complete.

Ive seen this same type of issue as well with 2 different chargers. One charger (45w pd) will fast charge with super turned on but not fast, notification only says fast charge. The second (39w qc3) will fast charge with regular fast charging turned on, but turning on super does nothing. Charge times are the same with both chargers on regular charging and fast, with 0 differemce between fast charging and super.

peterg21 said:
You and I discussed this earlier. Do you think it is the port that has become damaged? Part of the reason for my getting the wireless charger is my Note 9 is very erratic when it comes to fast charging. Cleaning out the port with a toothbrush/compressed air. rebooting...wiping cache partition, new cable etc never truly fixed it for me. I do feel that when first plugging in the S21 ultra (before going wireless) the connection seemed a lot firmer.
Click to expand...
Click to collapse
I'm as clueless as you at this point unfortunately.
My port is good, cable/charger, tried hard reset, cleared system/akp caches, did the recall thing and so on.
I'm wondering if it's a battery fault. Do older batteries go into fast charging the same as newer ones? It's almost as if it's throttling the fast charging, sometimes it's full bore then it drops out to 1%@45 seconds then to 1%@minute.
Or is it a calibration ie it thinks it's at 90% when it's only at 70%?
The only I haven't done is a factory reset, lol.
All this started one night when it was slow charged to 100%. WTF?
TFF the curse of technological Beast!
Guess I'll try recall again.

dscline said:
It does appear to be related to the Samsung 25w brick. I have the one that came with my S20U. It will "Super fast charge" my S21U no problem. If I turn off super fast charging in the phone, it only says "charging" when plugged in, and with my phone @ 65%, it said it would take well over an hour to charge (forgot the exact time). Then I took my phone w/o changing any settings to a generic 18w QC3 brick, and it said "fast charging", and said it would take 44 mins to complete.
Click to expand...
Click to collapse
Right on. Sounds like it's not just my phone. That's a relief. It's puzzling why the phone can't also fast charge with that brick. Perhaps it's simply a bug that Samsung either never noticed, or it isn't a priority to them. It would be nice if we could take advantage of the different settings without having to have two different bricks sitting around.

I think I figured it out. The fast charging setting is for the old classic fast charger. If you connect your phone to that one, you'll see it says it's fast charging. If you don't have fast charging turned on, it'll prompt you to turn it on to use that charger at it's maximum capability. If you use one of the newer Samsung C to C bricks, it's going to do the super fast charging.

I am currently using this Baseus charging plug and get full range of charging options - fast / super fast.
Thought I would try some I have hanging around before buying a Samsung one.
Baseus USB C Charger 120 W with GaN Tech Power Delivery USB-C Power Supply Compatible with MacBook Pro/Air, iPad Pro, iPhone 12 Pro Max/11 Pro Max/XS Max, USB C Laptops, Surface Pro, Galaxy, Huawei: Amazon.de: Computer & Accessories
Baseus USB C Charger 120 W with GaN Tech Power Delivery USB-C Power Supply Compatible with MacBook Pro/Air, iPad Pro, iPhone 12 Pro Max/11 Pro Max/XS Max, USB C Laptops, Surface Pro, Galaxy, Huawei: Amazon.de: Computer & Accessories
www.amazon.de

a.gordon1989 said:
Ive seen this same type of issue as well with 2 different chargers. One charger (45w pd) will fast charge with super turned on but not fast, notification only says fast charge. The second (39w qc3) will fast charge with regular fast charging turned on, but turning on super does nothing. Charge times are the same with both chargers on regular charging and fast, with 0 differemce between fast charging and super.
Click to expand...
Click to collapse
XDA just covered this in their article:
Fast Charging Explained: The slowest to the fastest Fast Charging technologies
Curious about fast charging? Here's everything you need to know about fast wired charging standards and how to pick the best charger!
www.xda-developers.com
Unless a charger has USB-PD PPS they will only FAST Charge @ 18w with fast charge on (super fast on/off wont matter as it will be off). If you are getting super fast charging then you are getting the expected 25w which is totally fine and not bad for battery. You will get super fast with the samsung 25w adapter and maybe the previous series 45w adapter.

I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?

Tmel14 said:
I have a 45W USB-C PD port as part of an Anker PowerPort and also the 18W charger that came with my Pixel 5. Would I notice much of an improvement in charging speed or integrity/longevity of the battery by purchasing Samsung's 25W charger?
Click to expand...
Click to collapse
No huge charging improvement. It most likely will degrade the battery faster.
I use only the Samsung 25w bricks because they are known good and relatively cheap.
Just picked up a 25w brick and cable for $20.
The amount of trouble a defective charging hardware can cause means I won't consider using 3rd party chargers/cables for fast charging.
Fast charging is a nightmare to troubleshoot as I'm learning now... will see if a couple full 100-0% charge cycles get it or not.
It's time consuming and irritating.

thegr8anand said:
XDA just covered this in their article:
Fast Charging Explained: The slowest to the fastest Fast Charging technologies
Curious about fast charging? Here's everything you need to know about fast wired charging standards and how to pick the best charger!
www.xda-developers.com
Unless a charger has USB-PD PPS they will only FAST Charge @ 18w with fast charge on (super fast on/off wont matter as it will be off). If you are getting super fast charging then you are getting the expected 25w which is totally fine and not bad for battery. You will get super fast with the samsung 25w adapter and maybe the previous series 45w adapter.
Click to expand...
Click to collapse
Thanks for posting the link to that article. It clears some things up. Charging standards have become rather confusing with all the proprietary standards. This makes me feel more comfortable using the 25w super fast setting on the s21 ultra.

Looking for a wireless car charger

Hello! I'm looking for a wireless car charger for my Samsung Galaxy Note 20 ultra. My Baseus charger (on the screenshot) broke after only a year of usage.
It has 10w output and so when the navigation is on it only helps keep the charge.
Sometimes Xiaomi 20w car charger is recommended but according to reviews it still chargers Note 20 Ultra with 10 watts, 20w is only for Xiaomi charging protocols.
Can you advise me a charger that is compatible with and can charge the device with more than 10w?

Just look in Amazon, there's a lot of them that offer different watts for charging, not expensive either unless you go with name brand

I am looking for one as well. I have two scosche magicmount chargers that are fast charge. The 9v 1.67A or roughly 20 watts, but these will only charge the new note 20 ultra at 10w. From what I can tell they start off fast charging then the phone stops them and only allows the 10w. I took one of these apart along with a Samsung branded fast charger, the biggest difference I saw right away was the samsung charger had dual coils. So I think that may be the difference the phone recognizes because the voltage and amperage are the same.
I'd like to find one that has the same or similar magnetic mounting system. Its mostly a matter of convenience but also I have used clap ones before, not all were wireless chargers but the manual one often broke on me and the one automatic one I have has a touch button on the side that is very sensitive, so it often releases when I don't mean for it too.
@adj998 Yes there are plenty on Amazon, but unfortunately it seems Samsung has deemed this single coil wireless chargers as inadequate and disables fast charging on them.

darkdragone said:
I am looking for one as well. I have two scosche magicmount chargers that are fast charge. The 9v 1.67A or roughly 20 watts, but these will only charge the new note 20 ultra at 10w. From what I can tell they start off fast charging then the phone stops them and only allows the 10w. I took one of these apart along with a Samsung branded fast charger, the biggest difference I saw right away was the samsung charger had dual coils. So I think that may be the difference the phone recognizes because the voltage and amperage are the same.
I'd like to find one that has the same or similar magnetic mounting system. Its mostly a matter of convenience but also I have used clap ones before, not all were wireless chargers but the manual one often broke on me and the one automatic one I have has a touch button on the side that is very sensitive, so it often releases when I don't mean for it too.
@adj998 Yes there are plenty on Amazon, but unfortunately it seems Samsung has deemed this single coil wireless chargers as inadequate and disables fast charging on them.
Click to expand...
Click to collapse
This is the best one I've had, been working for a year and charges like a samsung wireless charger.
Xiaomi Wireless Car Charger 20W Max Power Inductive Electric Clamp Arm Double Heat Dissipation Fast Charging (Black) https://www.amazon.com/dp/B07PKF3M43/ref=cm_sw_r_apan_glt_fabc_8JY9GMG9XTADWYVMV6B5

I've used this one since Sept.2021. I love it.
Amazon.com

c-prodigo said:
This is the best one I've had, been working for a year and charges like a samsung wireless charger.
Xiaomi Wireless Car Charger 20W Max Power Inductive Electric Clamp Arm Double Heat Dissipation Fast Charging (Black) https://www.amazon.com/dp/B07PKF3M43/ref=cm_sw_r_apan_glt_fabc_8JY9GMG9XTADWYVMV6B5
Click to expand...
Click to collapse
How has this Xiaomi charger fared? And how fast does it charge the N20 Ultra? The one I have doesn't charge the N20, just keeps it at a constant level but the same charger does charge an S7 and a Note 9 much faster (so probably coming up against the Sammie 'lets annoy customers by making them buy only Sammie wireless chargers' issue!). I have tried moving the phone up/down a bit to see if that's the issue but no luck.
So, looking to get something that charges faster and will get this one if it does so. Anyone else have the Xiaomi charger and is happy with it?

I am still happy with it, it charges my s23 ultra fast, the screen says fast wireless charging so, it is still good.