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#294391 - 12/15/19 11:52 PM Handwarmer power banks, useful?
clearwater Offline
Old Hand

Registered: 03/19/05
Posts: 1158
Loc: Channeled Scablands
Realizing you can't have your cake and eat it too, are any of these things good at being both a hand warmer and power bank.

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#294392 - 12/16/19 12:23 AM Re: Handwarmer power banks, useful? [Re: clearwater]
haertig Offline
Pooh-Bah

Registered: 03/13/05
Posts: 2138
Loc: Colorado
I had one. No, it was no good at warming. Even on high, you could barely tell it was on. The most pitiful excuse for a heater that I ever encountered. Then they recalled it, because it was a fire hazard. Their recall said to immediately stop using it for any purpose (I had already done that, long before).

YMMV with a different model/brand.

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#294395 - 12/16/19 04:03 AM Re: Handwarmer power banks, useful? [Re: haertig]
hikermor Offline
Geezer in Chief
Geezer

Registered: 08/26/06
Posts: 7191
Loc: southern Cal
Timely question. I am about to gift wrap and place one under the tree for Mrs. Hikermor, who often takes a hot wter bottle to bed to keep her feet warm. It is touted as a power bank as well, and of course, incorporates a flashlight (Don't they all??)

I'll let you know how this one works.
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#294396 - 12/16/19 05:34 AM Re: Handwarmer power banks, useful? [Re: clearwater]
haertig Offline
Pooh-Bah

Registered: 03/13/05
Posts: 2138
Loc: Colorado
Try to stick with a name-brand one if those exist. Mine was a no-name one, probably a Chinese import, sold by an American retailer.

When mine was recalled, I filled in the web form and they sent me a special latching shipping box, I suppose to handle the hazard of the burning battery. That shipping box was cool, and probably worth more than the heater. It was like a high end waterproof Otter box or Pelican case. So I ignored the recall, kept the case, and dropped the heater off at a battery recycling place. I was happy in the end - not with the heater, ... with the shipping case!

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#294398 - 12/16/19 01:48 PM Re: Handwarmer power banks, useful? [Re: haertig]
hikermor Offline
Geezer in Chief
Geezer

Registered: 08/26/06
Posts: 7191
Loc: southern Cal
My surprise Xmas gift is branded Celestron, a name I believe I have heard before. It comes in a fairly typical container. We'll see....
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Geezer in Chief

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#294400 - 12/16/19 06:23 PM Re: Handwarmer power banks, useful? [Re: hikermor]
haertig Offline
Pooh-Bah

Registered: 03/13/05
Posts: 2138
Loc: Colorado
Originally Posted By: hikermor
My surprise Xmas gift is branded Celestron...

I know of them for making telescopes, astronomy gear and binoculars. Celestron been around for many decades, and their stuff is good. I have some of their telescopes and optical eyepieces myself. I looked at their website and they do indeed make LiION power banks (to power their telescope electronics) so it's probably the same company that sells your heater/power bank. I would trust them to make something much better than my cheap Chinese junk heater. A heater would be a good idea for astronomy - I remember freezing my butt off more than once back when I was actively in the hobby. Standing around at 3:00am in the dark, in the Colorado mountains, without moving much is cold - even in the summer!

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#294402 - 12/16/19 11:11 PM Re: Handwarmer power banks, useful? [Re: clearwater]
teacher Offline
Old Hand

Registered: 12/14/05
Posts: 886
Bought a Dryguy brand to try. Will report
(Note: they say to charge the battery every three months - so at least once in the middle of Summer.)

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#294853 - 02/17/20 11:03 PM Re: Handwarmer power banks, useful? [Re: clearwater]
teacher Offline
Old Hand

Registered: 12/14/05
Posts: 886
Two month report, Dryguy works well, holds a nice charge and is warm but not too warm. Recommended.

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#295399 - 03/23/20 06:14 PM Re: Handwarmer power banks, useful? [Re: clearwater]
gulliamo Offline
Member

Registered: 09/11/02
Posts: 163
Loc: Denver, CO, USA
We've used these all winter. Pretty solid. USB-C.

https://www.amazon.com/gp/product/B07GX9T1WX

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