Dr. Kirkby,
it does confuse me a little why you would buy a VNA from AliExpress, but
not a battery from Amazon. ;-)
As long as ones expectations are correctly set - namely, to receive a
battery of an unknown capacity and quality, which might fail without
notice, but broadly speaking without catastrophic consequences, buying from
the sellers you mentioned should cause no particular problems.
I've seen no indications that the batteries sold on AliExpress or indeed on
Amazon should be any more dangerous than batteries bought elsewhere - and
given the price difference of roughly 10 times, the cheap batteries should
perform just fine for the average hobbyist reading this list and using a
NanoVNA.
Your recommendation to buy from a supplier for the *professional* market
does not particularly provide anything for the majority of us: Hobby users.
--
Rune / 5Q5R
On Thu, 26 Sep 2019 at 14:29, Dr. David Kirkby from Kirkby Microwave Ltd <
drkirkby@...> wrote:
On Thu, 26 Sep 2019 at 12:57, Carlos Cabezas <eb4fbz@...> wrote:
My battery started swelling after two charges. I am afraid it could
explode or damage the nanoVNA due to the pressure. I will change it as
soon
as possible.
Bought at AliExpress Guangyi0016 Store.
I would *never* buy batteries from eBay, AliExpress, Amazon or similar.
Just buy from a reputable distributor of components for the *professional*
market. In the UK, I would use Farnell, RS. Digikey would be sensible in
the USA. Use something made by Panasonic or other manufacturer of
batteries. If you buy from eBay or similar, you are likely to get 100%
genuine fakes.
As for claimed capacity, these seem to be generated with random number
generators.
If one mounts the NanoVNA in a larger enclosure, to make it more
mechanically reliable, then within reason, one can probably choose what
capacity battery one wants, although it would be sensible to check the data
sheet on the charger chip - someone did give the part number on here a few
weeks ago.
Dave.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 08914892.
Registered office:
Stokes Hall Lodge, Burnham Rd, Althorne, Chelmsford, Essex, CM3 6DT, United
Kingdom
