[Solved] Romoss Sailing 6 20800mAh Power Bank: Stopped Charging Overnight, Possible Fuse or Cycle Issue

Hello,
I have a Romoss sailing 6 20800mAh powerbank. I used it for a month, it was connected via an inverter to the bike's generator and suddenly it stopped charging overnight. It has stored energy, thanks to which I can charge a device, but it does not want to charge at all. I have already checked various chargers and USB cables, no response.
Now the question of what could be the cause? Two things come to mind
- maybe there is a fuse built in and it fell
- the number of cycles has ended
Only now the question is what is it like with these charging cycles. If I connect the power bank to the charger for e.g. 5 seconds, it is already counted as a charging cycle? So as the manufacturer provides for 1 thousand cycles and if I sit for half a day and connect and disconnect the charger, I will get a power bank?
The point is that when I ride a bike, the bank is charged only when I reach a given speed. And you know, here is a photo, and this is the light, that shit, and sometimes during the day it will turn on and off dozens of times. It just so happens that I'm going on a bike trip around the world and it was supposed to be my source of energy.
Greetings.

It's not like you will achieve n cycles and won't charge your power bank anymore ... And how the manufacturer counts is irrelevant to us.

The point is that the cells degenerate with charging and discharging. It cannot give you symptoms like you say - it leads to a gradual decrease in the cell's capacity.

Probably the electronics controlling the charging of cells were damaged ... You would have to look inside.

What a colleague wrote, it also comes to my mind that maybe the charger made a short circuit and burnt some cable or charger plug

There are only two things inside such a powerbank - a package of cells and a circuit board containing an electronic circuit that controls it ("chargers" are only power supplies. The circuit controlling the charging of batteries in phones, powerbank etc. is located in the target device itself). The only thing he can think of is damage to the electronics, at least to the charging control circuits ...

I will undress my grandfather and maybe something will be visible.
You can elaborate a little more on the topic of charging cycles. What the manufacturer means by the fact that the bank has 1,000 cycles. Full charge and instantaneous connection equal one cycle? It makes me tired because I don't fully understand it.

Added after 18 [minutes]:

Tell me more about + and -. With alternating voltage, it theoretically does not matter. But how does the inverter charge with DC voltage and we would replace the + and - cables, can you release the electronics?

What inverter was charged by a colleague PowerBank? Has the inverter been damaged as well?

gulek5 wrote:

Tell me more about + and -. With alternating voltage, it theoretically does not matter.

Otherwise - with alternating voltage, you do not have + and -.

gulek5 wrote:

But how does the inverter charge with DC voltage and we would replace the + and - cables, can you release the electronics?

Yes of course...

Hello
The easiest way is to disassemble and take photos of the electronics board and put it in the topic, then we will know what we're talking about, because so far there are many inquiries and nothing can be repaired.

gulek5 wrote:

You can elaborate a little more on the topic of charging cycles. What the manufacturer means by the fact that the bank has 1,000 cycles. Full charge and instantaneous connection is equal to one cycle? It makes me tired because I don't fully understand it.

Probably a complete charge and discharge takes one cycle, but there is no point in counting it - once this number is coarse - the battery will not "give up" after so many cycles, only with use it will slowly weaken, two durability depends on the way of use and depends on a multitude of variables, so it is impossible to calculate how long the cells will wear out.

This Powerbank has Li-Ion cells on board. Unlike the older types, these batteries are not only good for frequent recharging - they last longer if you recharge before being fully discharged.

Moreover, the durability is highly temperature dependent. They age much faster at higher temperatures.

Again, a dose of unnecessary theory, everyone clicks or actually does not know what, we have to help or talk like old women in trade.
I renew
1 undress
2 take pictures of the PCB from both sides
3 insert into the post
It will then be known what charging system and td .....

Why unnecessary? When looking for a solution to the problem, the author asked what the charging cycles are all about, so the answer was given. The author himself asked for it. :P

In addition, the author also announced that he will open a powerbank. So don't fry, just wait for the photos.

I go to the topic, I have the same model only 16k, I charged it maybe 3 times and now it cannot be charged, after connecting it for a moment it shows as if it is charging, then one paw blinks (like when the battery is discharged) and that's it. Is not charging. Someone has a similar problem, mine is practically new and I hope to find a receipt and send it back, unless there is a way to do it?

hello and I want to reactivate the question I have the same power bank and I have the same problem, save me, I gave PLN 200 for a power tank and here is a lime just after the Guarantee something went down ...

Dziczku13 wrote:

hello and I want to reactivate the question I have the same power bank and I have the same problem, save me, I gave PLN 200 for a power tank and here is a lime just after the Guarantee something went down ...

Any measurements taken? The battery can be charged with an external charger outside the power bank?

Currently, I have been charging it for over 2 hours with a regular charger from Huawei Honor 7 2A and the second LED on the PB has jumped.

Charging is continuous and uninterruptible at 5.06v. When connecting the 18650 batteries, they had 3.58v, currently they have 3.78v, I am waiting for 8pcs of batteries to reach 4.2v. It is supposed to be charged with a 2A charger max 14h and recently it was charged after 16h and barely one line jumped .. Please forgive the disassembly, but this Korean-Chinese miracle was additionally covered with plastic and there was no chance to get it out of the clamps normally. I had to use force. And by the way, it is possible somewhere to buy a plate with even one charging output 2.1A to transfer the battery to a new module and use it ?? Because the current battery supports me with GPS and LTE mobile internet and it's enough for me for 20 hours of driving Below you have photos like something, write what may be the reason for the failure. Only once or max 2 times I had the chance to leave the car in the night when it was frost -10 degrees, is it possible that it would hurt even though it was in a fabric cover ??

I do not want to post under the post, but the 3 diode jumped up, i.e. after measuring the 2xp 4 batteries have 3.80v, it generally charges but the charging current dropped to 5.05v

Dziczku13 wrote:

Currently, I have been charging it for over 2 hours with a regular charger from Huawei Honor 7 2A and the second LED on the PB has jumped.

Charging is continuous and uninterruptible at 5.06v. When connecting the 18650 batteries, they had 3.58v, currently they have 3.78v, I am waiting for 8pcs of batteries to reach 4.2v. It is supposed to be charged with a 2A charger max 14h and recently it was charged after 16h and barely one line jumped .. Please forgive the disassembly, but this Korean-Chinese miracle was additionally covered with plastic and there was no chance to get it out of the clamps normally. I had to use force. And by the way, it is possible somewhere to buy a plate with even one charging output 2.1A to transfer the battery to a new module and use it ?? Because the current battery supports me with GPS and LTE mobile internet and it's enough for me for 20 hours of driving Below you have photos like something, write what may be the reason for the failure. only once or max 2 times I was able to leave in the car at night when it was frost -10 degrees, is it possible that it would hurt even though it was in a fabric cover ??

Dziczku13 wrote:

but the charging current dropped to 5.05v

Charging current in volts? What exactly and how did you measure?

I measured the charging point with the meter and the same with the battery ... i.e. with micro usb I have 2 points + and - so this is the charging point there, I currently have 5.06v DC and I have 3.95V on the battery and it grows, we will see what and how I will post a photo in a moment . I'm waiting for about 2 hours.

edits not to give posts not needed. I noticed that at 93%, the PB turned off and does not charge, so there must be a fault but I do not have any equipment to check, so it will discharge the PB and charge again for the next discharge and then I will transfer the cell to another PB. There is no risk of damaging the Smart or other devices. As soon as I find out what was the cause, I will let you know here :)



The PB was charged and it was 4.23v on full charge, now it is charging Honor 7 and it charges almost 150min and the% indicator shows 59% so something is wrong with the charging. The output is to have 2.1A, which is supposed to charge my Huawei Honor 7 in 110min, max 130min. So it charged me before this problem. The average charging time was a bit more than 2 hours. The H7 battery has 3Ah, not 3.1Ah, as stated by the manufacturer. I will see after discharging PB and recharging maybe something will change.

Dziczku13 wrote:

I measured the charging point with the meter and the same with the battery ... that is, with the micro usb I have 2 points + and - so this is the charging point there, I currently have 5.06v DC and I have 3.95V on the battery and it grows, we will see what and how I will post a photo in a moment . I'm waiting for about 2 hours.

I do not know electronics that well, but if someone finds it useful, I will describe my observation on this PB

I made 3 charging measurements and as it turned out, however, something with the electronics is wrong, some security system has failed. Where there is the symbol ??, it should be 2.1A loading, let's say but there was about 1.65A to max 1.8A. A is currently max 470mA A in the place where the Symbol is ? it charges with a maximum current of 1.35A. The reversal took place and the damage was done but I do not understand how it could be, is it safe for the batteries themselves ?? I am waiting for some answers because I am afraid that the batteries will not behave like grenades.

I measured it through the famous USB Doctor Kwei as it shows V, A, H and mA.

Dziczku13 wrote:

I did 3 charging measurements

Loading what? Power bank or external device from a power bank?

Dziczku13 wrote:

Where there is the symbol ??, it should be 2.1A loading, let's say but there was about 1.65A to max 1.8A. A is currently max 470mA A in the place where the Symbol is ? it charges with a maximum current of 1.35A.

What does your test load look like?

Dziczku13 wrote:

The reversal has taken place

What "reversal"?

Dziczku13 wrote:

I measured it through the famous USB Doctor Kwei as it shows V, A, H and mA.

What is this invention? Some voltage and current meter plugged into the cable?

I measured this with such a meter, [img] https://2.allegroimg.com/s400/01814a/9321f4ed4bc6b48757c565e1de02 [/ img]


I was charging Honor 7 with PB and where the 2.1A was supposed to be 470mA max, which shocked me, and where 1A max is supposed to be, it is 1.35A. And that's why I ask if it is safe. Charging the PB from the network is normally done with the Huawei Honor 7 charger. The charging current is 5.20V all the time, sometimes it will drop to 5.12V and this is 5.20V. The ameper that occurs when charging the PB is from 800mA to 30% later
1.35A and from about 55% 1.60A up to 99% and this 1% is charged with 5.10V and 35mA, then everything is turned off 100%, the LEDs on the PB are turned off, so I disconnect from the mains. This is what it looks like ... Only the USB have changed the charging power of the Smartphone, which shocks me.

jdubowski wrote:

Dziczku13 wrote:

I did 3 charging measurements

Loading what? Power bank or external device from a power bank?

Dziczku13 wrote:

Where there is the symbol ??, it should be 2.1A loading, let's say but there was about 1.65A to max 1.8A. A is currently max 470mA A in the place where the Symbol is ? it charges with a maximum current of 1.35A.

What does your test load look like?

Dziczku13 wrote:

The reversal has taken place

What "reversal"?

Dziczku13 wrote:

I measured it through the famous USB Doctor Kwei as it shows V, A, H and mA.

What is this invention? Some voltage and current meter plugged into the cable?

] Link [/url]

Dziczku13 wrote:

I was loading Honor 7 from PB

The phone is not a test load - it consumes current according to the internal logic that we do not always know.

Dziczku13 wrote:

where 2.1A was supposed to be max 470mA which shocked me and where 1A max is supposed to be 1.35A. And that's why I ask if it is safe.

If the load is to consume more than 0.5A current (your phone - you can expect a higher current consumption - it has a 2A charger by default), then it should not be connected to a port with a declared capacity of 0.5A, because the port may be damaged.

Dziczku13 wrote:

The ameper that occurs when charging the PB is from 800mA to 30% then 1.35A

Pretty strange loading logic.

Ok, I understand but I have been charging this PB for over a year and it has always charged my phone for max 120 minutes and now 4 hours ... a nightmare. Why should it damage the port on the phone as it is 500mA when charging, it charges with a lower current.

Dziczku13 wrote:

Why should it damage the port on the phone as it is 500mA when charging, it charges with a lower current.

Not a phone port, but a power bank port.

There is nothing to write about, PB goes to the bin and the cells stay .. The only salvation is to buy a new PB housing for 8 cells. From 10% smartphone to 100% smartphone where the battery is 3Ah, it was charged for 4h12min. So both USB charging outputs may drop, and that's a lot. Only the efficiency is still the same, because it will fully charge my smart 5 times .. With 20,800 real capacity of the cells themselves, I get about 15Ah. That is why I am starting to look for a ready-made housing with electronics with an efficiency of 80%. What ready-made housings do you recommend?

Dziczku13 wrote:

It is nothing to write about PB to the trash

After all, it is functional.

Dziczku13 wrote:

From 10% smartphone to 100% smartphone where the battery is 3Ah, it was charged for 4h12min.

And correctly. This is a power bank for a boat or a bicycle trip, not for charging for races.

jdubowski wrote:

Dziczku13 wrote:

It is nothing to write about PB to the trash

After all, it is functional.

Dziczku13 wrote:

From 10% smartphone to 100% smartphone where the battery is 3Ah, it was charged for 4h12min.

You don't understand what I'm saying. Previously, he charged my smart in 2h10min and now the same amount of charge does not even reach 1.35A, which worries me ...
And correctly. This is a power bank for a boat or a bicycle trip, not for charging for races.

I want to say that some time has passed since the last post and after playing with my PB I ordered a new one and this one has a damaged PCB. I do not know how, but the varnish came off the PCB and exposed the paths, and then there was a short circuit and damage to the converter, which results in charging but with a slightly higher current than the standard USB gives. There are sometimes jumps from 650mAh to 930mAh and so it can still charge 680-720mAh for several hours. The 2A output has a max of 930mAh and the 1A output is 720mAh. It's a waste of time, so I ordered from banggood.com PB for PLN 25, I will only put the accessories in it and that's it .. Maybe the efficiency is not 92% but the 80% will be

After such a period, I want to say that I took the batteries out of the middle and made a new PB of them and they still fly and calmly from 0 to 100 will charge the Samsung Galaxy S7 Edge 4 times, I tested the batteries 3 times on the 1000 km route on Automap, where the PB can be calmly at the end of the route 20% of the capacity remains ...