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Hi to all,

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I've noticed some problems regarding charging X6100 internal battery while using firmware R1CBU/R2RFE 0.28.

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Battery was weak (7V or so) so I decided to charge overnight with OEM charger unit. Switched "charger on" in the R1BCU firmware, set power off and then inserted OEM charger unit. Green LED starts, but not flashing, was permanently on. (This normally means "battery full"...) But left it charging anyway.

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Next day when I get the charger off and started the X6100, the internal battery was completely empty. By switching off the DC, the transceiver suddenly shut down.

So tried new charge cycle using OEM firmware (1.1.9 / 1.1.8), but with the same result. Green LED is still glowing permanently and the battery does not charge. Power supply shows a consumption of only 0.9 Watts, too less.

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What happenend? Battery damaged while charging? Issue with battery management??

Firmware problem? Should we set "charge on" with R1CBU or OEM firmware or both??

What means "charger shadow" in the R1BCU fimware?

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Anyone out there who has experienced such a case?

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Thanks for any advice

73 / 72 – Uli DK9TZ

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This is very interesting.

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This is very much the problem I am having as well, but with stock firmware. I just created another thread about a problem with audio on Tx on battery and it might be due to low voltage of the battery. The led also stays permanently on... Very interesting... Wonder if there is something on with the charging circuitry or if it needs some way to be reset or something...

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It has crossed my mind to maybe try and open the radio, charge the battery with an external charger, and then close it to see if the BMS would wake up. Maybe too low of a voltage of it to even charge?

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I would need new screws, the ones on my radio are already worn out hehe.

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So, ideas to reset the BMS? Anything is welcome.

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73,

Rui Oliveira, CT7ALW

My original x6100 led flashed while charging. Recently purchased a replacement after the old one developed a fault. The led stays on while charging with the new one but it does charge. Mine charges with original and R1CBU firmware. You may have a fault with the battery or charging circuit.

Regarding the charging of the internal battery of the X6100, you may want to take a look at my post ten or so days ago: /g/xiegu-x6100/message/6468 and perhaps collect some information on the battery charge process by running the 'monitor-charging' Python script while the X6100 is charging (runs on Linux and needs the USB cable connected to the 'DEV' port).

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These are my findings from that post:

- in my case too the LED stayed solid green while the battery was charging, so I don't know if it really matters (as long as it is not completely off)

- if you look at the plot of the battery voltage and charge vs time, the logic of the internal charger of the X6100 is very simple: constant current (about 177mA) until the voltage reaches about 8.43V, then constant voltage. At constant voltage it looks like the battery is still being charged at about 35mA

- I am not a battery expert, but it looks like the batteries (there are actually two of them in the X6100 connected in series) can be overcharged above 6000mAh - in my case the firmware was showing up to 6600mAh, but looking at that plot I suspect it could have gone even higher

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73,

Franco K4VZ

The name "Shadow charging" was invented by Oleg, after my suggestion of the feature.

Stock fw only had options Charger On or Charger Off.

If you wanted to charge the battery with the supplied external charger you had to turn "Charger On" in the settings each time you turned the radio off.

Likewise you had to go to settings and turn "Charging Off" before transmitting, as it was recommended to NOT CHARGE BATTERIES WHILE TRANSMITTING.

I suggested the feature of "automatically turning charging on when powering radio of" and vice versa.

And Oleg implemented it ?

Thanks to all for your suggestions! Everything very interesting!

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My X6100 still has a valid warranty so I'll try Radioddity first before opening the seals...

We'll see and I'll let you know about every good solution.

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Tnx again and a merry xmas - Uli / DK9TZ

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Since everyone here is just talking about charging the battery... I have another very interesting issue.

First I have to admit that I didn't really understand the charging process when I got my x6100 many moons ago. But from the first day on charging didn't start by just connecting it to external power. My procedure is: switching on the radio, connect the charger and switch the radio on again. A few seconds after switching off the radio indicates charging by a flashing green LED and the charging works normally.

It doesn't even matter whether I use the original FW (any number) or the alternative FW.

Any ideas, how I could fix that?

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All the best to all of you and your families for 2025?

from Rico, DG5BQ