Syper caps from China

[Damian]

Has anybody used these super capacitors from China?

The price is pretty good, no idea about the quality though.
Whether the claimed 500F capacity is there or not is the issue.

http://www.ebay.com.au/itm/6pcs-Farad-Capacitor-2-7V-500F-35-60MM-Super-Capacitor-NEW-/321793086577?pt=LH_DefaultDomain_15&hash=item4aec5cd471

 

[Computer Nerd Kev]

On 14 Jul 2015, Damian wrote:

Has anybody used these super capacitors from China?

The price is pretty good, no idea about the quality though.
Whether the claimed 500F capacity is there or not is the
issue.

http://www.ebay.com.au/itm/6pcs-Farad-Capacitor-2-7V-500F-35
-60MM-Super-Capacitor-NEW-/321793086577?pt=LH_DefaultDomain_
15&hash=item4aec5cd471

I haven't used them and that listing has been taken down now,
but looking around it seems that most of the cheap caps in
this price range are "Samwah Green Cap EDLC(DB)" models.
Datasheet here (scroll down to DB series):
http://www.masters.com.pl/files/ds/samwha/samwha-green-cap.pdf
And web page here:
http://www.masters.com.pl/en,news,samwha-green-cap-edlc

Funny that the datasheet shows they only make them up to 400F,
so that might be a warning to begin with.

This seller has supposably sold 131:
http://www.ebay.com.au/itm/331491520127

One neutral feedback:
"Capacitor would not hold the charge. will drop to 1.3V in
about 5 min."

Also this negative one for 100F caps:
"Useless. They won't hold a charge."

Quite a few positive feedbacks too though, and it's hard to
know whether the above people tested them in some intelligent
way.

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