Beware of cheap underperforming clones

As of 2023 there are many badly performing clones on the market. V2/3GHz NanoVNA uses parts like ADF4350 and AD8342 which are costly and clones have been cutting costs by using salvaged or reject parts.

See official store and look for V2 Plus4/V2 Plus4 Pro versions only to avoid getting a bad clone. We have stopped selling V2.2 versions since October 2020, so all V2 hardware that are not Plus or Plus4 are not made by us and we can not guarantee performance.

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Changing dead battery - how long to life ?

Anne Ranch 2025/01/11 08:05

I have " resurrected" - long unused , nano  vna and upon connecting to my PC USB I get ONE steady green LED and no response from "lsusb"...
No LCD display at all...
I have connected to "regular"  USB charger  with same effect - no life...

Assuming dead battery - how long should it take to vna to show any life ?
The USB cable I am using used to work just peachy...

Marc RIVIERE 2025/01/12 10:59

Difficult to say...

I think the nanovna should work when the charger is connected, even if the
battery is dead (except short-circuit ! ).

I have a SAA V2 nanovna for a very long time. There is no problem with the
battery.

It would be necessary to measure the voltage of the battery.



> **envoy e :** 11 janvier 2025 a 17:05
> **de :** "Anne Ranch via groups.io" <anneranch2442=gmail.com@groups.io>
> **a :** NanoVNAV2@groups.io
> **objet :** [nanovnav2] Changing dead battery - how long to life ?

>

>
>

>

> I have " resurrected" \- long unused , nano vna and upon connecting to my PC
USB I get ONE steady green LED and no response from "lsusb"...

>

> No LCD display at all...

>

> I have connected to "regular" USB charger with same effect - no life...

>

> Assuming dead battery - how long should it take to vna to show any life ?

>

> The USB cable I am using used to work just peachy...

_._,_._,_

* * *

Mark Libner 2025/01/13 06:31

The one I have will not turn on with a dead battery. If it won't charge the battery in 4 hours, change the battery.

Anne Ranch 2025/01/13 15:36

OK, I'll  plead ignorance...and will freely admit that -  I "did not read " the manual...
I now have one flashing  green LED  and  one steady green LED  -located next to the USB connector.
I actually do not need the battery, I am alter using  nanoVNa-saver for the display - hence it has to be alive
and connected to  PC.
BUT
the real USB connection did not seem to be strong enough to recharge the dead battery...
So the ( Mickey mouse ) solution - one USB cable connects to power and the other connect to PC   - data connection.
Stripping the USB cable was fun...
I hope it is NOT Al and can be  soldered...
73

vaclav_sal 2025/01/18 12:42

I have one more silly question - the "power" LED - next to the power on/off switch,  keeps flashing no matter what the "battery" state LED does.
At some point the battery state LED was steady and the power one kept flashing...
Now is the time ....to replace the battery...

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