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Baofeng UV5R Backup Battery (2 replies and 2 comments)

G4TAI
9 months ago
G4TAI 9 months ago

Hello Chaps, 

Does anyone know whether the Baofeng UV5R has a backup battery? 

I ask because I have a Baofeng UV5R that forgets what is programmed every time I switch it off.

Effectively, it Factory Resets but worse because the settings show gobbledegook when I switch it back on. 

If it does have a backup battery, is it on the underside of the PCB that includes the keypad popper buttons? 

Or perhaps the problem is caused by a corrupted codeplug? 

73 

Nick 

PS: actually it is a Retevis UV5R but I believe that they are the same thing. 

Pete M7HRL
9 months ago
Pete M7HRL 9 months ago

Hi Nick,

My Baofeng UV-5R keeps everything In memory when I turn it off and back on again, It also keeps it's memory when I change the battery.

I haven't dismantled my one yet so can't advise on the location of the battery back up, but I'm sure someone on here can advise.

 

73

Pete

G4TAI
9 months ago

Hi Pete,

Many thanks for your feedback.

I have taken two radios half apart (only removed the complete PCBs from the radio) and can't see where it is either.

I guess it is going to be very small and I won't be able to order one off of eBay, etc.

Actually, the radio I have is a RETEVIS RT5R. It is almost identical inside as a UV5R.

It could be that the memory battery has gone flat and the radio just needs to be turned on for several hours to charge it again?
So, I am leaving it switched on for 24 hours to see whether that is the case.

If that doesn't work, Oh Well!
It is an interesting project trying to get it working. :-)

The next step will be finding someone with a RETEVIS RT5R who can download its codeplug and send a copy to me.
I will then try to upload it to my RT5R to see whether that cures the problem.

73

Nick

PS: For anyone who has been watching eBay: Yes, this is the RT5R that was sold a week ago. :-)

G4TAI
9 months ago
G4TAI 9 months ago

Should I have put my reply here and not as a Comment? 

 

Hi Pete,

Many thanks for your feedback.

I have taken two radios half apart (only removed the complete PCBs from the radio) and can't see where it is either.

I guess it is going to be very small and I won't be able to order one off of eBay, etc.

Actually, the radio I have is a RETEVIS RT5R. It is almost identical inside as a UV5R.

It could be that the memory battery has gone flat and the radio just needs to be turned on for several hours to charge it again?
So, I am leaving it switched on for 24 hours to see whether that is the case.

If that doesn't work, Oh Well!
It is an interesting project trying to get it working. :-)

The next step will be finding someone with a RETEVIS RT5R who can download its codeplug and send a copy to me.
I will then try to upload it to my RT5R to see whether that cures the problem.

73

Nick

PS: For anyone who has been watching eBay: Yes, this is the RT5R that was sold a week ago. :-)

(unknown)
7 months ago

Most devices that have an electronics board should have a chip called an RTC also known as CMOS, they can discharge to the state of being replaced. I’ve never taken a radio apart although I’ve taken plenty of other things like computers and laptops and the CMOS looks like one if those CR32 round batteries. If you see something like this the that is what you are looking for. Run a volt tester across it, you should get some kind of reading. If not then yes it will most likely need replacing. Which is usually not difficult on a computer as most of the time it’s in a partial plastic cage so easily recognisable, hopefully it’s the same on a handheld radio board. Or you could just grab a new one for £12 on Ali Express…

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