Author Topic: Any Baofeng UV-3R /MkII owners?  (Read 1707 times)

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GreekMan

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Any Baofeng UV-3R /MkII owners?
« on: June 20, 2017, 01:53:58 AM »
I recently got one, for being pocketable and USB charged.

But during the charging I noticed that there is a light that changes color on the USB supply.
So I wonder if it this that regulates charging or if the radio does.

Does anyone has an idea?
(before i start dissembling things?)

GreekMan

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #1 on: June 20, 2017, 02:04:14 AM »
Update:
i just had a look at the UV-3R site at the charging and radio diagrams

http://www.uv3r.com/images/UV3R_Diagram.pdf
http://www.uv3r.com/images/UV-3R_AC_Adapter_YC_2011A.pdf

Tevin

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #2 on: June 20, 2017, 05:15:18 PM »
I have an older Bao and I'm pretty sure the charge control circuitry is on the charger itself.

If you're curious, rip it open anyway. It's not like they are expensive to replace.

spacecase0

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #3 on: June 20, 2017, 06:06:39 PM »
I tested mine,
the charge circuit is in the battery. it is the battery protection circuit that makes them quit charging.
so you can't get batteries without protection in them.
and your USB charger has to be current limited

GreekMan

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #4 on: June 21, 2017, 01:10:24 AM »
well, after psoting I found a surce that said that there is one inside the batetry, but there is also one in the radio too.
Seems it is the ltc4054-l
http://cds.linear.com/docs/en/datasheet/4054l42fa.pdf

Bottom right in the schematic http://www.uv3r.com/images/UV3R_Diagram.pdf

so now I will have to find the time to spend the battery juice and charge with a USB meter inline

spacecase0

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #5 on: June 21, 2017, 10:23:37 AM »
if it matters, the external charger that came with my radio has only wires in it, no circuitry at all

all my extra batteries are for fuji NP-60 (there is another NP-60 for another brand that is not the same battery)
best ones I have found is "MaximalPower" (1800mAh)

now I charge the batteries with a desk charger meant for my camcorder , it has a shutoff circuit in it.
and it does a better job of charging than the radio came with.

GreekMan

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Re: Any Baofeng UV-3R /MkII owners?
« Reply #6 on: June 27, 2017, 10:05:05 AM »
quite probably...there is a better chance it uses the proper charging algorithm.
BTW I opened up the charging cradle also, just wires inside.