TP5100 Single 4.2V / Dual 8.4V 2A Lithium Battery Charging Board Review Test Tutorial
HTML-код
- Опубликовано: 6 авг 2024
- Review and test of this neat 1 or 2 cell up to 2 Amps lithium cell charging board.
Skip to Testing 6:44
Data Sheet www.microlab.info/wp-content/u...
🛒 TP5100 Single 4.2V Dual 8.4V 2A Lithium Battery Charging Board bit.ly/TP5100_1S_2S_2A
🛒 TP5100 Single 4.2V Dual 8.4V 2A Lithium Battery Charging Board s.click.aliexpress.com/e/_AADXzR
🛒 UNI-T UT210E Clamp Meter bit.ly/UT210E_Clamp
🛒 UNI-T UT210E Clamp Meter s.click.aliexpress.com/e/_9fLa6z
🛒 ANENG AN8002 Multimeter Temperature Tester bit.ly/ANENGMultimeterTempTest
🛒 ANENG AN8002 Multimeter s.click.aliexpress.com/e/_ABHE9b
🛒 MUSTOOL G700 HD 1080P Portable Desktop LCD Digital Microscope bit.ly/LCDMicroscope
🛒 MUSTOOL G700 s.click.aliexpress.com/e/_9G0yjP
🛒 Four Wire Battery Test Rack bit.ly/Batt_TestRack
🛒 Four Wire Battery Test Rack s.click.aliexpress.com/e/_ACnCzL
Input voltage: DC 5-18V(actual 5-12V is appropriate)
Charging status: full and no-load blue light, red during charging
The voltage setting must be operated in the power-off state, and the switch must be disconnected before switching.
Characteristic:
1. Dual / single 8.4V / 4.2V lithium battery charging
2. Built-in power MOSFET, switch mode, low device heat, simple external
3. Programmable charge current, 0.1-2A
4. Programmable precharge current, 10%-100%
5. No need for an external anti-sinking schottky diode
6. Wide operating voltage up to 18V
7. Red and blue LED charge status indication
8. Chip temperature protection, over-current protection, under-voltage protection
9. Battery temperature protection, reverse battery shutdown, short circuit protection
10. Switching frequency 400KHz, available inductance 20uH and above
11. PWR_ 0N-power, battery-powered switching control
12. Less than 1% charge voltage control accuracy
13. Trickle, constant current, constant voltage three-stage charging to protect the battery
14. Using QFN16 4mm*4mm ultra small package
Absolute maximum rating:
1. Static input supply voltage (vin): 20V
2. BAT: -8.4V~20V
3. BAT short circuit duration: continuous
4. Maximum junction temperature: 120℃
5. Working environment temperature range: -40℃~85℃
6. Storage temperature range: -65℃~125℃
7. Pin temperature (welding time 10 seconds): 260'℃
Application:
Portable devices, various chargers, smart phones, PDA, mobile cellular phones, MP4 or MP5 players, tablet PC, model airplanes, power tools, intercoms
Click Here to Subscribe bit.ly/1nformatica
Good source of electronic parts: bit.ly/ElecComps
Follow on Facebook / 1nformatica
If you would like to buy me a coffee: www.paypal.me/1nformatica
DISCLAIMER: Unless otherwise stated all products shown in this video have been purchased personally. The description and video may contain links to products which might be affiliate links, so if you click on one of the product links I could receive a small commission. This does not affect the price you pay. If you do purchase through my affiliate link this will help fund future videos, thank you for your support!
#1nformatica 
Наука
A lot of time and effort and condensing what I imagine is a long process into a "handy bite-sized" video is great. Factual as always. Great work!
Thanks Brian. Few people realise how much effort goes into making a video. I think RUclips should not allow people to "thumbs down" a video until they have uploaded 10 or more themselves!!
Thanks for your inspiring video.
LOW RESISTANCE CONNECTION OF YOUR LI-ION CELL
Measuring the Li-ion charge current can be done with the clamp meter as shown in the video or with a DVM-200mV range connecting across the two resistors of 100mΩ in // on the TP5100 board. I soldered a short wire to the 100mΩ at the side of the board and one to the + cell contact at the corner. Do not use a current meter in series with your Li-ion cell because that prevents the proper working of the constant current and constant voltage stages due to the increase of series resistance of your Li-ion cell which results in a huge reduction in the 'fully charged' capacity of your cell. The video of 1informatica shows this effect very clear. The problems in the video set-up are the relatively long wires to the Li-ion cell and the various poor contact resistances of the Li-ion cell contacts and clips. The video shows a charge current limited to only 1.7A but should be 2.0A for all cells you connect. Also the 5V adapter in the video could be insufficient to provide enough current. (see further reading)
In my set-up I used a 30V3A power supply and connected the Li-ion cell with only 0.5mm diameter thick wires each of only 5cm long soldered to the TP5100 and soldered to a cheap Li-ion 18650 battery holder wherein the battery was clamped. At a power supply voltage of 12V I measured the full 2A current (100mV across 50mΩ) during the constant current stage (3V-4.2V) and after reaching the 4.2V the current started to decrease slowly until 0.2A during the constant voltage stage which stopped the charging and the cell voltage stabilized to 4.19V. 😜 My Li-ion cell is: LG 18650HD2C 2100mAh. (DYSON vacuum cleaner)
If you change the current set resistors from 50mΩ to 100mΩ or even 200mΩ the wiring resistance to your Li-ion cell will be less of an influence. As long as you measure exactly 2A, 1A or 0.5A during constant current stage (cell voltage of 3.00V-4.20V) your wiring is OK.
BE AWARE OF ELECTROSTATIC DISCHARGE
I bought 5 x TP5100 and blew-up the first one😫. The second one I handled very carefully and FIRST OF ALL I earthed myself by touching the wall-outlet-ground pin before I open't the TP5100 ESD protection bag. I connected my ESD safe 18W USB-C soldering iron (TS80) to the wall-outlet-ground-pin with a separate wire. (A special screw for that is located at the metal part of the TS80)
The first wire I soldered to the TP5100 board was the earth (0V-GND) and connected that also to the mains earth of my power supply (centre or 3rd pin = mains-earth). Then I connected the 0V of my 30V3A power supply also to the 0V-GND wire of the TP5100 board. Finally I set my power supply to 5.00V and connected the positive 5V to the TP5100 board. PERFECT...Only blue LED started burning 😅 and the board draws only 2.22mA from the power supply.
After connecting a Li-ion cell only the red LED started burning but my charge current was much to low. That was the reason to find out the importance of short and soldered wiring to my cell.
TP5100 EFFICIENCY
My power supply wires to the TP5100 board are 2.5mm2 and 1.5m long. Inductance can generate oscillations inside the TP5100. To be sure the inductance of these wires was eliminated I soldered 100μF//47nF to the input contacts of the TP5100 board. At 5V input I was not able to reach 2A stable charging of my Li-ion cell and the TP5100 came in thermal limiting. Turning the voltage of my power supply up to 12V provided a stable 2A charging current of my Li-ion cell.
No extra cooling for the TP5100 was provided. The board was in open air and ambient temperature was 24ºC.
According to the Top Power ASIC TP5100 Data Sheet the efficiency is about 90% over an input voltage range of 10-16V and 1A charging current setting. My measured efficiency of TP5100 @12V input, 2A and between cell voltages 3.97V-4.19V was 80%-83%.
ABSOLUTE MAXIMUM VOLTAGE TO TP5100
When I turn the voltage up to the absolute maximum value of 20V (Data Sheet) it looked good but after some minutes my second TP5100 blew-up 😫. So use 18V as a maximum.
Thank you for your detailed analysis, valuable reading for all. It seems some people have received reject or counterfeit devices that are out of spec or simply self destruct on power up! Please consider subscribing if you haven't done so already!!
Many thanks!
Your videos are a pleasure to watch. Very competent and high quality.
Thank you. Your kind feedback is much appreciated.
Thanks for the video. I was searching for a chip data sheet to do exactly what you did when I came across your video. I had already guessed right on everything but I wanted to verify before having a heart stopping moment. I plan to quarter the current by making a “teepee” out of the two 100 mohm resistors. I’ve done it before. Works well and is reliable.
Hey thanks! Good tip on the "teepee", I'll try that when the time comes! Please consider subscribing if you have not done so already!
Great tip on cutting the connection between the parallel resistors to cut the current in half! I will need to do this on mine. I have SET shorted to make it a 2S 8.4V charger. My R's are installed for 2A and the chip and inductor get WAY TOO HOT! So hopefully cutting the track and halving the current will cool it off. For now I have added stick-on heatsinks to the top of the inductor and the back of the board. The PCB is designed well and conducts heat very well away from the 5100 but it still gets very hot. I also have 2S BMS on the pack.
Thanks! I am happy you found it useful. Please consider subscribing if you have not done so already!
Thank you so much for this video. It helped me a lot. Especially to limit the charging current by removing one 0.1 resistor to increase battery life.!! 👍👍👍
You're welcome! Please consider subscribing if you haven't done so already!!
Hopefully you get many views so people can see how to connect the board properly. Great illustration as always. Cheers!
Thanks Mario! I found it strange that the board was not labeled. They managed to silk screen the "set" pads, maybe they got bored or it was Friday afternoon!!
1nformatica, LoL
Really nice little board, man! Great job!!! 😊
I may get one of these for a future project... Let's see. 😊
Thanks Mario! Yes I have many projects using 1 or 2 cells so this is a good solution. Hope to see a video from you soon.
@@1nformatica Thanks! As soon as possible! 😊
Question: did you used a 2s BMS with the batteries?
No. Previously I charged them with my IMAX B6 charger.
@@1nformatica Oh, nice!
Very well explained video. Hat's off to the Great efforts put in to create this video.
Hey thanks! It is rare to have such a nice positive comment. Much appreciated. Have a great day!
Very nice and informative video.
Hey thanks! Please consider subscribing if you have not done so already!
I bought 5 of them, connected first one to 12V and it let the magic smoke out of the TP5100 IC.
Second one doesn't explode and consumes 2mA doing nothing(correct), but when I connect lithium battery it has no current control and just bypasses the input to the battery output.
Other 3 have a intermittent short on the input, doesn't measure any low resistance on the input, but when I connect 12V with limit on 10mA it goes right onto current limit state on my power supply(charger is shorting), if I would connect these to power supply that isn't current limited those would blow up just like the first one.
I had the boards inspected and I couldn't see anything wrong.
I even resoldered TP5100 on one of the boards that has intermittent short on the input, no difference.
:(
That's really bad. I have heard similar stories. Maybe a bad batch or the modules are rejects that have found there way back to market as sometimes happens. I have not had any problems with the ones I have purchased from the supplier linked in the video description. Please consider subscribing if you haven't done so already!!
I had the marking on the back side i think. The usb meter is unreliable for the TP5100 because the TP5100 contrarily to the TP4056 is a buck converter. So if it draws 1A @ 5V, it can ouput 1.2A@4V for example (the TP4056 is a passive reg, so the extra voltage is dissipated as heat)
Fantastic tutorial thanks for explaining each step as you go - I have a TP5100 and small 12V solar PV panel to charge 2 x LiPo batteries, so this has given me some good insight in what to look for! One thing I don't understand, is once the batteries are charged what happens with the power that the solar unit continues to produce, does that get emitted out as heat somewhere? How does the TP5100 cope with that?
Once the batteries are charged the TP5100 effectively shuts off and does not draw any power fron the solar panel. The only thing to be aware of is that the maximum input voltage for the TP5100 is 18 volts and you should check that your panel does not exceed that. Please consider subscribing if you haven't done so already!!
I just came across this video and your comment as I research for a solar solution to power Ikea electric roller blind! The Ikea blind comes with a battery pack (BRAUNIT), a 2S lipo (+8.4V) unit with a built-in 5V micro USB charging circuit. But Ikea didn’t allow for permanent usb wiring and rather you take the removable battery pack out and recharge it as needed. The roller blind only uses the +\- terminals of the battery pack. So I figured I could build a 2S pack with a common 12V solar panel for car batteries. This should almost eliminate the need to remove and charge the blind’s battery pack.
I’m wondering how you got on with the solar panel build? One thing I don’t really know is if the TP5100 will operate if the input voltage fluctuates as sunlight level changes.
Thanks for really informative video...can you please tell me what is the most correct way of charging 2x18650 8.4v balanced? What components do I need? Is the tp5100 necessary or only a 2s bms is enought...I am really confused..thank you!
I use just the TP5100 for 2 cell packs. Provided the cells are well matched to begin with balancing should not be an issue ruclips.net/video/z2Rhk8KJp_k/видео.html You can always add a cell balance module to the pack if you feel it is necessary. Please consider subscribing if you haven't done so already!!
I'd really like to know how to connect external LED's for charge state. I presume a pull down resistor would be required on the anode?
The LED's on the board are common anode and there is a 1K resistor in place. ruclips.net/video/gKNF-hATmfQ/видео.html You could just connect the external LED in parallel using the pads provided.
Great Video, simply explained.
Does the TP5100 have a low voltage cut-off to protect the battery? I am thinking of this for a simply 8.4V LED work light
Yes. Link to datasheet in the description "8. Chip temperature protection, over-current protection, under-voltage protection".
@@1nformatica Thanks for your prompt reply, greatly appreciated. Keep up the good work.
Please consider subscribing if you haven't done already!!
can it be modified for 4.1v ( also called lilo battery on some chargers, basically 3.6v cell rather than 3.7v cell)?
or even for iron phosphate lithium? ( 3.2v)
I don't think it can be modified. You can see the datasheet here : voltiq.ru/datasheets/TP5100-datashhet.pdf Thanks for watching, have a great day!
you can look at a the bottom of TP5100 board to see the marking for input and output
Thanks for the tip! The reverse of my boards is blank. Please consider subscribing if you haven't done so already!!
@@1nformatica When i connect a load of 0.5A the voltage drops to 2V from 8.4V . Any solutions ?
Indeed. The boards I received have 'some' markings on the back. Not very clear, but better than nothing.
I'm currently working on a project and I think that this board is what I need but I'm still needing information. If I've got 2 lithium cells in parallel and connect them in series to another 2 cells in parallel, would this still charge it? Also, would I need to use protected cells or does this board work as cell protection? Also is a balancing board really necessary? For the last question, isn't charging amperage dependent on what the battery pulls? If the battery pulls 2 amps, then that shouldn't be bad for it right?
The board can charge a 2S2P pack at a charge current up to the maximum of the board which is 2 Amps. The board protects the cells against over-current , under-voltage, reverse battery shutdown and short circuit protection. If the cells are well matched balancing should not be an issue for low current applications. The resistor on the board sets the charge current, the board is a constant current source.
I wanted to ask when the charging is not present does it output only battery volts or is it boosted?
It is just the battery voltage. Thanks for watching, have a great day!
since its buck regulator based charger, i thought it would give better power efficiency but, when it is connected it draws 1.7 amps from 5V and delivers 1.6A at 3.7V to the li cell. its more or as linear chargers its not helping in improving efficiency. am i correct?
The claimed efficiency is around 90%. You can find a graph in the datasheet : voltiq.ru/datasheets/TP5100-datashhet.pdf
@@1nformatica ya but in practical testing you did , it was drawing lot more current right?
elpablito
What is strange for me is that no one is arguing about the cut-off current, or if you prefer the value of the current then the battery is disconnected because it is supposed charged. My test with a 2s configuration is about 200 mAmp that i consider too hight. It would be interesting to know your viewpoint.
Most likely is that the cell voltage has risen to the point the overvoltage protection has terminated the charge. This can happen with cells that have a high internal resistance. What is the mAh rating of the cell? 200 mA charge rate may be too high, try reducing it or changing the cell for one with lower internal resistance. Please consider subscribing if you have not done so already!
I have tested two TP5100 with 18650 cells made by various producers with different results
It seems that TS5100 over 5.8V is generating a PWM with a frequency of 400 KHz and a duty cycle from 100% to 0% according to the charge of the cell. Is it correct?
@@elpablo8703 I believe so, you can see a translation of the product description here : www.microlab.info/wp-content/uploads/sites/5/2018/06/TP5100-EN-autotranslated.pdf
@@1nformatica Thank. That datasheet is well known , but unhappily is short. I have just noticed that near the end of the charge both the leds are on. Connecting a scope my feeling of the way of working is what i said
Can I charge with this module 2 Battery 2200 mah 18650 lithium ion cell in Parallel connection
Sure, no problem. Of course it will take longer to charge as double the capacity. Make sure the cells are well matched : ruclips.net/video/z2Rhk8KJp_k/видео.html RUclips no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!
Hello
Is ther a video how the tp5000 module can be modefied for 4.2v and 3.6v and the current settings and how to solder the led on the module? 🤔
I have not seen a video for the TP5000. The information you need is in the data sheet : www.thethingsnetwork.org/forum/uploads/default/original/3X/a/3/a3166934bb6174988630eabfedc6be571a697a6f.pdf Please consider subscribing if you have not done so already!
@@1nformatica thank you very much
@@WaschyNumber1 You are welcome! I found this for you : lygte-info.dk/review/Review%20Charger%20TP5000%204.2-3.6V%20module%20UK.html Please consider subscribing if you have not done so already!
Do you think I could connect two of these in parallel for increased current? Also do you think it would survive being powered by a 19v laptop supply?
Generally speaking it is never a good idea to parallel power supplies unless they have been specifically designed to do so. 19 volts is too high. The absolute max is 18 volts but the data sheet recommends 12 volts. If you can describe a little about the cells you want to charge and their configuration perhaps I can suggest an alternative device.
I am going to build an isolated balance charger, 8 laptop supplies to one each of these chargers, I think 2a will suffice for my 4-5 parallel packs so will just use one tp5100 per cell block., to be safe i will use a buck stepdown between the power supply and charger to provide 5v.
@@AdvanceNowRC Better to step down to 12 Volts which is recommended.
I tried a few a while ago, they were broken pretty easily. Never had aproblem with TP4056+DW01
Interesting! While doing my research I saw a similar report where someone bought 10 and 6 failed immediately the power was applied. I believe there are many counterfeit devices being sold so best to find a reputable source.
Most TP4056 are prob fakes also, maybe the TP5100 is more sensitive to ESD?
Hi thanks a lot for the wonderful video
I have a different issue I am facing tp5100 Red light is blinking continously can you please help me on the same
I have connected 12v 1.5amp charger and connect 7.4v baterry pack
Thanks in advance
I have subscribed to your channel in advance
Flashing red is an error condition. Did you set the link for 2 cells? ruclips.net/video/gKNF-hATmfQ/видео.html Otherwise there is a problem with the battery or connections. Did you try another battery? Good luck!
wait, so does this not balance the cells in a 2s 8.4v arrangement?
No, it does not balance the cells. You would need to add a balance board to the cells.
No brother. U need to add a self balanced 2S BMS board.
both the cells are connected in Series, with nothing in between them.. How do you expect the module to balance the voltage between them?
Can we connect this 2A to 2 Li Ion batteries in parallel (without disconnecting R100 ofcourse), then each cell would get 1A ?😊
In theory yes! You would need to make sure the cells are well matched to start with otherwise they will not share the current equally. Check out my video on cell matching : ruclips.net/video/z2Rhk8KJp_k/видео.html
These tp type chips measure the charge current to determine when to stop the charge. With 2 batteries in parallel you halve the internal resistance so the charger will terminate much later and could over charge the cells.
Thanks 👍🏻👍🏻
You're welcome! Have a great day!!
@@1nformatica may I ask, if the one resistor will get over heat or something, because why would they provide two in parallel??
@@sksdy9444 My guess is they used 2 * 0.1 ohm as 0.05 ohm is not a "preferred value". Also as they are in parallel the two a sharing the 2 Amp charge, so one passing 1 Amp is effectively the same.
@@1nformatica oh.. right sir 👍🏻
Hi, does this have undervoltage cut-off when the load causes the battery to drop below 2.5/2.8V?
See page 4 of the datasheet : www.microlab.info/wp-content/uploads/sites/5/2018/06/TP5100-EN-autotranslated.pdf
V IN Undervoltage lockout threshold 3.5 Volts. Please consider subscribing if you have not done so already!
@@1nformatica Thank you very much. 3.5V is far too high to fully extract the capacity of a 18650 cell.. hmm...guess i'll have to stick with the TP4056.
module based on TP5100 is only for charging; infact there is contacts for power "Vin" e for battery but no contacs are available for load as in the other module based on Tp4056
@@francescacosentino6975 how do you use the module if you can't power anything with it?
@@David-ty6my this module is only for charging and I suppose that Francesca use it for this purpose only
Im very new to electronics, apologies if this is a stupid question, when you said the logic pins went from low to off? How would you read that because I thought they would go from a high to low?, Im not sure if im getting my question across corectly but if you could attempt to answer it that would be great lol
The logic outputs to indicate the charge status go from low to high or vice versa. The logic tester I used shows green for logic 0 or low and red for logic 1 or high. Please consider subscribing if you have not done so already!
@@1nformatica Okay but when you probed the full charge pin while it was charing it displayed no lights? I understand when it finished charging it displayed high but surely it should of displayed low while it had not finished charging.
@@ollieq This effect is because the pins are driving an LED. Logic low is OK but when the pin goes high the volt drop across the LED means that the probe does not register the voltage as "high" because it is "high" minus the volt drop. Hope that is not too confusing! If you removed the LED then it would show correctly high & low.
1nformatica makes perfect sense, thank you very much for your explanation
@@ollieq You're welcome!
They make balancing boards for a 2S with no protection really cheap and small enough to be unnoticable if you care.
Thanks for the tip! I'll keep an eye on the balance of the cells and add if required.
how is TP5100 better than TP4056? I believe we can also charge 2 18650s using a single TP4056 if we connect the 2 18650s in parallel..
The major difference is that the TP5100 can charge 2 cells in series.
@@1nformatica That doesn't answer my question. Nevertheless thanks for the prompt reply
@@johnnybuoy9551 There are links to the datasheets in the video descriptions, you can find all the answers there.
Does it get hot while charging single cell at 2A?
Hi, it certainly gets quite warm. If I were charging at 2 Amps I would add a fan, maybe temperature controlled like I did here : ruclips.net/video/DWQWljEoaFQ/видео.html
Please consider subscribing if you haven't done so already!!
my tp5100 bright both leds.What can i do?
That is an invalid condition. If the board does not return to normal after the power and battery are removed then I am afraid the board is faulty.
@@1nformatica thx.
@@bahadrguven6268 RUclips no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!
Is there any design engineer here who can make a circuit diagram for 8.4V 400mA Lithium Charger with T output for thermistor, vin should be 10 ~ 15V;
The circuit is in the video and linked in the description : ruclips.net/video/gKNF-hATmfQ/видео.html What more do you need? Thanks for watching, have a great day!
Do you know of any similar board, but for 3 cell Lithium-ion batteries.
P.S. excellent review btw!
Hey thanks! How about this : www.mikroe.com/charger-9-click Please consider subscribing if you have not done so already!
@@1nformatica Thanks, it looks like very capable board, but a bit on expensive side :) In the meantime I have found this board: www.ebay.com/itm/3S-11-1V-Lithium-Lipo-Li-ion-18650-Battery-Charging-Board-12-6V-Charger-Module-/192493619652 , but I can't find anything about the chip on it or any other place it is sold at so I'm a bit suspicious.
no cell balancing? isnt that a fire starter?
Provided that the cells are well matched then no. See my video on matching here : ruclips.net/video/z2Rhk8KJp_k/видео.html The only danger I have seen with liPo or Lion is when the cells are abused as in the RC world. RUclips no longer shows me if you are subscribed. Please consider subscribing if you have not done so already!
Please test 2s 2p battery 7.2 volte
The TP5100 is not suitable for those cells. Thanks for watching, have a great day!
no balanced charge, could easily damage battery or causing fire or even explosion.
Provided that the cells are well matched to begin with the risk of "causing fire or even explosion" is infinitely small ruclips.net/video/z2Rhk8KJp_k/видео.html If you are that concerned the addition of a balance board module costs a few cents.
Great video as always hope all is well with you and yours , what board would you recommended for 2s battery used in a solar panel led project? Thanks. Sorry to go off topic here but I have a question. I recently burned this resistor drive.google.com/file/d/19-Jov7QmSg6PRj6KgpShUtGfV8Ayhr6-/view?usp=drivesdk, off this meter, drive.google.com/file/d/18Nd9fWzPXMfNst3hNdTKI-qWssSM_L9J/view?usp=drivesdk. Is it possible to use a regular resistor to replace it? I know its very cheap to get, but I don't feel like waiting 1 month for it. Unless there is no other way. Thanks a million.
Hi Mario. You can use this charging board but you will need a regulator in front of it for the solar panel. See ruclips.net/video/6YHi8u7NADU/видео.html
I do not see any problem replacing that resistor with a standard one of the correct wattage.
1nformatica , Thanks I will try that regulator. I have bunch of the blue ones. Will need to get the red ones after watching your suggested video. As far as the resistor goes, where can I find out bout the wattage. Chip resistor 2512 0.025R 25mR R025 alloy this is all the info that Ali express provides. I tried your coffee link but it doesn't go any where maybe its down. I will keep trying. You deserve one.
Your measurements with the USB tester are no accurate because of the losses in the wire and the charger board itself
Please use thicker wires, those are just wasting power.