Quote:
Originally Posted by that_guy
Hey guys, looking for a cheap solution for dew problems for my ed80 and finder guider. found these on ebay that run off of usb (so using power banks). i know they dont run as hot as dew zappers that are more expensive, but do you think they'll work okay if left on constantly?
http://www.ebay.com.au/itm/2-x-USB-D...cAAOSwRUhY9s0q
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I have just received two I ordered,took about two weeks to get them from China but no worries about that
I have not tested them on my Vixon 81mm Binoscope,but wrapped one round my wrist for about 15 minutes"they say they are good for sore wrists etc"
It didn't get very hot,but I think it will be sufficient to keep the dew of the main lens.
It will be interesting how long the power bank will last

It is a Sygnify 12000mAh
Input DC 5V 1A
Output DC 5V= 3A(max)
Seems to me to be OK.
One question

Will I need two powerbanks,or can I use the powerbank with two USB's attached.

Any helpful comments will be much appreciated.
Cheers
PS, there is no information on what the heaters draw, in fact there is no information at all
about the product,It is nameless. :O