BC125AT: How to program the uniden BC125AT with a PC without charging it?

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RandyKuff

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I leave the switch turned to rechargeable in case I need a quick charge
Kind of a waste dont you think... If your using the radio at the time... That is not a Quick charger in the radio anyway... And not a smart charger...
Keep some extra batterys with you... And use the external charger...
 

FrensicPic

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With my 325P2, it will not charge if the radio is turned ON, which it must be to program it from a computer. It will be powered via USB though.
If the scanner is OFF, it will ask if you want to charge or not.
No need to mess with the switch.
 

wtp

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i have a 325 that used 2 cells in it.
when i grab it to go out, i also grab 2 extra cells.
it is almost an involuntary reaction after a couple of years.
 

Scan125

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It does not charge the batteries when turned on, only when it is turned off if you have it set to do so. While turned on and plugged into a power source it will use power from the source to power the scanner but will not charge the batteries.
I leave the switch turned to rechargeable in case I need a quick charge while out, but normally use an external charger to charge them or have a spare set charged.
I'm not sure this is correct, well on the UBC125XLT. I need to check but I've plugged my UBC125XLT into my PC with low batteries and when turned on and Scan125 running it has shown the battery voltage rising and charging.

I guess we can all run tests but the definitive answer for each model would have to come from Uniden tech support as to what their micro code *actually* does in the various scenarios.

Over to Uniden :)
 

Noseybody

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I'm not sure this is correct, well on the UBC125XLT. I need to check but I've plugged my UBC125XLT into my PC with low batteries and when turned on and Scan125 running it has shown the battery voltage rising and charging.

I guess we can all run tests but the definitive answer for each model would have to come from Uniden tech support as to what their micro code *actually* does in the various scenarios.

Over to Uniden :)
From the manual
1691857339366.png
 

Scan125

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Well I just checked my UBC125XLT manual and it states the same as the 125AT manual HOWEVER

With batteries in and switch to NiMH and scanner turned OFF then when I plug the USB cable into either a USB charging device or a powered hub then the scanner disaply says "Charging".

If I do the same with the batteries removed it intially says "Charging" then "No Battery".

With scanner turned off and NO USB connection then the voltage across the batteries is 2.80V. If I then connect the USB cable it jumps to 3.10V so power is being applied to the batteries.

Clearly the manuals are wrong!
 

Noseybody

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Well I just checked my UBC125XLT manual and it states the same as the 125AT manual HOWEVER

With batteries in and switch to NiMH and scanner turned OFF then when I plug the USB cable into either a USB charging device or a powered hub then the scanner disaply says "Charging".

If I do the same with the batteries removed it intially says "Charging" then "No Battery".

With scanner turned off and NO USB connection then the voltage across the batteries is 2.80V. If I then connect the USB cable it jumps to 3.10V so power is being applied to the batteries.

Clearly the manuals are wrong!
Do you have a separate meter hooked up to your batteries, or are you going by the voltage displayed by the device? My 125, and my 436 display the voltage the unit is receiving, not battery voltage when connected to usb power. Thus how i get caught time to time with low batteries when disconnected from USB power.
 

RCjim

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Not sure if I missed something but I read and write to my 125 and it works fine with no batteries!
So just take them out works for me! Let us know how you make out.
 

a417

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Yet another use for a USB breakout cable with a separate power supply. I use it for power hungry devices or anytime I need to separate USB data pins from USB power pins. It would do that nicely.
 

FrensicPic

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Maybe this was your point, but that's because the BCD325P2 doesn't HAVE a switch.
Ha, ha, you're right. It doesn't have a switch. ...never noticed as I only use NiMH cells.
However, my comment about the radio does not charge batteries when the radio is on still stands.
 

sallen07

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Ha, ha, you're right. It doesn't have a switch. ...never noticed as I only use NiMH cells.
However, my comment about the radio does not charge batteries when the radio is on still stands.
Oh you're correct on that. If you have the USB connected and turn it off it will ask if you want to charge.
 

Scan125

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Do you have a separate meter hooked up to your batteries, or are you going by the voltage displayed by the device? My 125, and my 436 display the voltage the unit is receiving, not battery voltage when connected to usb power. Thus how i get caught time to time with low batteries when disconnected from USB power.
I used a separate digital volt meter across the actual batteries in the above test.
 

Scan125

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I used a separate digital volt meter across the actual batteries in the above test.
I used a separate digital volt meter across the actual batteries in the above test.

I'm think I'm beginning to see some interesting things.

When connect to a PC and running Scan125 the voltage on displayed on the scanner by depressing the volume knob and the voltage shown in the program are the same. Also the voltage increases over time as the batteries charge so on my UBC125XLT it IS the battery voltage at the terminal. NOTE however if I remove the USB cable and press the volume know for voltage it is lower and on the test I just did it was below 2V and the scanner powered off.

With no batteries in then the scanner displays no voltage (blank) but Scan125 reads 0.06V. A DVM reads 0.058V

Now the odd thing.

If I put the battery switch to ALK and power the cycle the scanner then I get the same results. At the moment I have to conclude that there is always a nominal voltage at the battery terminals when connected to a USB powered lead AND batteries are present. However in my case I did with old NiCd and not well charged so batts and NOT NiMh.

I don't currently have (or can't find) any NiMh batteries. The scanner charging circuit could be differentiating between battery types.
 
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