Lt1 Mini reverse charging

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Thu, 07/28/2022 - 00:13
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leftfordead
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Lt1 Mini reverse charging

Hi just wondering how the Powerbank charging works as I have plugged my phone in to the lantern but nothing happens.if anything I think the phone chargers the torch .do I need a special reverse charge cable or something? Thanks

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Thu, 07/28/2022 - 05:47
leftfordead
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Can anyone please explain if a special reverse cable is needed or something. Thanks

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Thu, 07/28/2022 - 08:56
TheLivingBubba
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I just tested mine by plugging in iphone 12 to it using a standard lightning to usb c cable and it started charging my phone.

Is your LT1 Mini fully charged? My mini was fully charged and my phone was at 90%

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Thu, 07/28/2022 - 10:33
leftfordead
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TheLivingBubba wrote:
I just tested mine by plugging in iphone 12 to it using a standard lightning to usb c cable and it started charging my phone.

Is your LT1 Mini fully charged? My mini was fully charged and my phone was at 90%


I have a usb to USBC what I charge my android with. I have a usb to USBC adapter what I put on the usb end so I then had 2 USBC ends and that did not work . Only my phone would charge the lantern.not the other way round. Do I need a cable then with with a USBC on each end as my phone is USBC and obviously the lantern?
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Thu, 07/28/2022 - 10:44
TheLivingBubba
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Try charging something else. I just plug in and charge things. Here is mine charging a security camera and a baofeng radio with it. You shouldn't need to do anything special besides make sure your LT1-mini is charged.

https://imgbox.com/gv4N9MAj

https://imgbox.com/vIYLFppV

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Thu, 07/28/2022 - 11:00
Mandrake50
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leftfordead wrote:
TheLivingBubba wrote:
I just tested mine by plugging in iphone 12 to it using a standard lightning to usb c cable and it started charging my phone.

Is your LT1 Mini fully charged? My mini was fully charged and my phone was at 90%


I have a usb to USBC what I charge my android with. I have a usb to USBC adapter what I put on the usb end so I then had 2 USBC ends and that did not work . Only my phone would charge the lantern.not the other way round. Do I need a cable then with with a USBC on each end as my phone is USBC and obviously the lantern?

Sometimes those adapters cause problems. I would try a USB C to C cable designed for charging. I can charge my Galaxy S10 from the mini with one of them.

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Thu, 07/28/2022 - 11:24
leftfordead
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Mandrake50 wrote:
leftfordead wrote:
TheLivingBubba wrote:
I just tested mine by plugging in iphone 12 to it using a standard lightning to usb c cable and it started charging my phone.

Is your LT1 Mini fully charged? My mini was fully charged and my phone was at 90%


I have a usb to USBC what I charge my android with. I have a usb to USBC adapter what I put on the usb end so I then had 2 USBC ends and that did not work . Only my phone would charge the lantern.not the other way round. Do I need a cable then with with a USBC on each end as my phone is USBC and obviously the lantern?

Sometimes those adapters cause problems. I would try a USB C to C cable designed for charging. I can charge my Galaxy S10 from the mini with one of them.

I think that’s my problem. I will buy a usbc to c and I’m sure it will work.
I’m presuming a USBC to Micro USB would also work?
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Thu, 07/28/2022 - 11:35
Oli
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leftfordead wrote:
TheLivingBubba wrote:
I just tested mine by plugging in iphone 12 to it using a standard lightning to usb c cable and it started charging my phone.

Is your LT1 Mini fully charged? My mini was fully charged and my phone was at 90%


I have a usb to USBC what I charge my android with. I have a usb to USBC adapter what I put on the usb end so I then had 2 USBC ends and that did not work . Only my phone would charge the lantern.not the other way round. Do I need a cable then with with a USBC on each end as my phone is USBC and obviously the lantern?
The short answer is, there is no such thing as a reverse charging cable. You didn’t answer the question above about the charge state of both devices. What is the voltage of the battery in the lantern? You can get that reading by clicking three times. What is the voltage of the battery in the phone. You can get that reading by using an app such as gsam battery monitor that’s been around for 10 years. Android is an operating system not a phone model. Different phone manufacturers and models may or may not work. Adding adapters to cables just lowers the odds even further.
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Thu, 07/28/2022 - 12:09
leftfordead
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Hi the lantern was 4.1
And my phone was at 73%
I think I need a proper cable

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Thu, 07/28/2022 - 12:25
Oli
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73% is not a voltage reading. Some phones charge to 4.2 volts and some charge to 4.3 volts. Charging and discharging is a two-way road. Your phone may be trying to drive on the right hand side of the road and the lantern may be trying to drive on the left hand side of the road. If your phone doesn’t like what the other driver is doing as far as voltage and amps it’s not going to play.

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Thu, 07/28/2022 - 12:36
leftfordead
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Ok so phone is reading 3.9v if that’s any help. Thanks for your help by the way

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Thu, 07/28/2022 - 13:25
SammysHP
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Oli wrote:
73% is not a voltage reading. Some phones charge to 4.2 volts and some charge to 4.3 volts. Charging and discharging is a two-way road. Your phone may be trying to drive on the right hand side of the road and the lantern may be trying to drive on the left hand side of the road. If your phone doesn’t like what the other driver is doing as far as voltage and amps it’s not going to play.

That’s not how USB and charging works. The actual battery voltage has absolutely no meaning (except that it won’t deliver any power if it’s empty). The charge controller also doesn’t know what voltage the battery behind the boost converter has.

Connecting two devices with similar capabilities via USB is difficult. Which one will serve as a source and which as a sink? Actually I don’t know how it is defined in the USB specification (don’t want to read thousands of pages), but they will negotiate their capabilities and one will decide to provide power. USB-C made it more difficult because previous connectors made it rather easy: full-size USB A is master and provides the power.

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Thu, 07/28/2022 - 13:35
kokosnh
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I wonder if it's not just PD support thing, we don't know the phone model 
It can also be triggering reverse charging protection, it's hard to tell...  

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Thu, 07/28/2022 - 13:38
leftfordead
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My phone is a pocco X3 .
It came with a fast charge cable.
USBC cable
I have a little usb-usbc adapter that I used so my cable would then have USBC both ends and I think that might be the problem

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Thu, 07/28/2022 - 14:58
Oli
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SammysHP wrote:

That’s not how USB and charging works. The actual battery voltage has absolutely no meaning (except that it won’t deliver any power if it’s empty). The charge controller also doesn’t know what voltage the battery behind the boost converter has.

Connecting two devices with similar capabilities via USB is difficult. Which one will serve as a source a.

My reference to voltage only had to do with the fact that 73% didn’t tell us a voltage measurement. What I do know is that some phones, including mine, will not charge from any power source that’s delivering one amp or less. I don’t know what the LT1 mini is capable of putting out voltage and amp wise. I can charge one of my phones from the wurkkos hd15 but not the other one. The red light comes on so it recognizes that it is plugged into a power source but will not charge. Again it wants more than one amp. And I seem to recall that the phone that I can charge needs to be plugged in in the proper order. Plug into power bank first and then into phone. I think it was some of the Huawei phones two plus years ago that wouldn’t work with certain wall warts. And that’s even when they were c to c. So it’s complicated. If you have two LT1 minis one is at 3.6 volts and one is at 4.0 volts and you plug them in together, what happens? Does it matter which one gets plugged in last? I don’t know. However I would guess that at 3.6 volts you’re not going to get any more power OUT no matter what you’re trying to charge.
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Thu, 07/28/2022 - 15:22
SammysHP
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Oli wrote:
If you have two LT1 minis one is at 3.6 volts and one is at 4.0 volts and you plug them in together, what happens? Does it matter which one gets plugged in last? I don’t know. However I would guess that at 3.6 volts you’re not going to get any more power OUT no matter what you’re trying to charge.

You will always get 5 V at the output. The boost converter should run until the LVP kicks in at about 2.8 V.

Which of the two will win? Not sure. The standard is complicated and I’m not sure if the controller used by Sofirn is following it in every detail.

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Thu, 07/28/2022 - 15:57
Oli
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SammysHP wrote:

You will always get 5 V at the output. The boost converter should run until the LVP kicks in at about 2.8 V.

Which of the two will win? Not sure. The standard is complicated and I’m not sure if the controller used by Sofirn is following it in every detail.

I just measured 4.68 volts at 1.03 amps out of the wukkos HD15 as a power bank. The battery is probably about 4 volts. And I’m pretty sure I recall testing and measuring it stopping producing power at somewhere around 3.6 or 3.7 volts. That was resting volts after removing the battery to measure.
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Thu, 07/28/2022 - 15:58
Mandrake50
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leftfordead wrote:
My phone is a pocco X3 .
It came with a fast charge cable.
USBC cable
I have a little usb-usbc adapter that I used so my cable would then have USBC both ends and I think that might be the problem
I suggest that you just get a C to C cable and give it a try. They are cheap and easy to find.
My bet is on the adapter being the issue. I have had plenty of problems in other applications when trying to use them.
All of the technical discussion is great. But if the proper pins in the connector aren’t routed through the adapter correctly, it cannot and will not work.
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Thu, 07/28/2022 - 19:30
roostre
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Mandrake50 wrote:
leftfordead wrote:
My phone is a pocco X3 . It came with a fast charge cable. USBC cable I have a little usb-usbc adapter that I used so my cable would then have USBC both ends and I think that might be the problem
I suggest that you just get a C to C cable and give it a try. They are cheap and easy to find. My bet is on the adapter being the issue. I have had plenty of problems in other applications when trying to use them. All of the technical discussion is great. But if the proper pins in the connector aren't routed through the adapter correctly, it cannot and will not work.

If the adapter forum member "leftfordead" mentioned is similar to the following:

https://www.amazon.com/Anker-Adapter-Converts-Technology-Compatible/dp/B...

Please be aware that the above and similar types of "USB-C to USB-A adapters" are uni-directional with respect to providing power and the USB-C end of the adapter must be plugged into the device that will be supplying the power.

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Fri, 07/29/2022 - 13:44
Jerryo100
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Some phones can function as a power bank to charge other phones. If your phone has this feature and a usb c to usb c cable doesn't work, maybe there is a setting on your phone to turn off the power bank feature. 

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