Hand warmers that are power banks!

Box Brownie

Box Brownie

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I saw this in an advert email for outdoor wear

www.lifesystems.co.uk

Dual-Palm Rechargeable Hand Warmers | USB Hand Warmer | Lifesystems

These Dual-Palm Rechargeable Hand Warmers provides 6-9 hours of heat and are mains or USB rechargeable.
www.lifesystems.co.uk www.lifesystems.co.uk

Splits into to warmers and each half is 5000mAH i.e. total 10000 mAH available.

Looks particularly interesting bearing in mind winter is coming!

Any thoughts of them?
 
I bought my son a pair of these to keep his hands warm while we are gliding - he says they work really well

D
 
I've got a version of these, used them this afternoon even. Mine is only 4000mAH but they last quite a while and kept in my jacket pockets on low really get pretty warm. I have thought of getting some the newer models which heat both sides of the warmers as the plastic magnetic side of the ones I have and you linked to don't heat up, only the outer side gets hot.

As a power bank I haven't really tried them as such beyond a quick couple of minute test to see if my phone would charge off one.
 
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Willid1 said:
I bought my son a pair of these to keep his hands warm while we are gliding - he says they work really well

D
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Thanks for the positive insight :)
RyanB said:
I've got a version of these, used them this afternoon even. Mine is only 4000mAH but they last quite a while and kept in my jacket pockets on low really get pretty warm. I have thought of getting some the newer models which heat both sides of the warmers as the plastic magnetic side of the ones I have and you linked to don't heat up, only the outer side gets hot.

As a power bank I haven't really tried them as such beyond a quick couple of minute test to see if my phone would charge off one.
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I saw one that was a single piece heated both sides but not a two piece one they heats both sides.

But my perception is that only one side heating is fine whether in jacket pockets I would not want hot spots close to my body.......but with hands in the pockets sit in the palms of the hands sounded like a good idea :)

Even with gloves my hands do get cold (perhaps they might just fit into the gloves) and if sitting in a hide warm hands would be welcome :)

With a bf discount I think I will get a pair.....though the OH might chide me this close to Xmas ;)
 
Box Brownie said:
I saw this in an advert email for outdoor wear

www.lifesystems.co.uk

Dual-Palm Rechargeable Hand Warmers | USB Hand Warmer | Lifesystems

These Dual-Palm Rechargeable Hand Warmers provides 6-9 hours of heat and are mains or USB rechargeable.
www.lifesystems.co.uk www.lifesystems.co.uk

Splits into to warmers and each half is 5000mAH i.e. total 10000 mAH available.

Looks particularly interesting bearing in mind winter is coming!

Any thoughts of them?
Click to expand...


Taking the middle time of 7.5 hours, and assuming the heaters are run direct from the battery and not a 5V inverter, that would give you about 2.2W per side.
An old fashioned single bar heater is 1000W, so around 400 of them might keep a small room warm :)

It would all depend on what was expected of them, I also think that 9 hours of effectiveness is a bit optimistic.
 
My mate had something very similar. He had them once before when we were doing night sky stuff in the winter.
You obviously can't put them inside a glove, but they are nice in your pockets to warm your hands when you aren't actually doing anything.
 
I have a pair of just hand warmers (no power bank option that I know of!) and despite their low power, they keep my hands toasty! They'd be a tight fit inside gloves but slide inside a pair of mittens.
 
Thank for reminding me that I have some ;)
On charge now.
 
I looked at those but I just got 2 X 10k power bank / hand warmer from Amazon (there are lots - mine aren't sold any more). One in each pocket of a dry robe warms me up after swimming. I usually turn them on, drop them in my boots and go for a swim. When I come back my boots are warm and they are ready to heat my hands :D

9 hours is incredibly "optimistic". From a 10k I reckon they stay warm for about 6-7 hours. So I'd be surprised if a 5k lasted longer than 3-4

Also, as a Reynauds sufferer.....don't wear gloves :) Gloves of any kind make my hands colder because the fingers can't heat each other - mittens are the way forward.
 
yup i have some of these , i bought them about 5 years ago when i was working a contract with border force at london gateway port for a month in winter
it was so cold i once bounced a turd of the frozen toilet water bowl , i had these in my pockets keeping my nads warm they are good,
 
I just went and bought a few hand warmers because of this thread, no more reactivating those chemical ones with a metal disc by boiling it.
 
It's -30'c here. The batteries would die in minutes. And there is no way to place them in gloves... LOL.
 
Woolsocks said:
It's -30'c here. The batteries would die in minutes. And there is no way to place them in gloves... LOL.
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Can I ask where is "here"?

As for battery performance in the colder conditions..... AFAIK that is indeed so where they are used in such conditions because the batteries themselves are cold and that affects their 'chemistry'.

However, by the nature of the hand warmers....as they heat up and maintain the heat they surely are also warming the battery too. No different to the advice/suggestion to keep your spare camera battery under your armpit or inside pocket in your coat ready for use.
 
Box Brownie said:
Can I ask where is "here"?

As for battery performance in the colder conditions..... AFAIK that is indeed so where they are used in such conditions because the batteries themselves are cold and that affects their 'chemistry'.

However, by the nature of the hand warmers....as they heat up and maintain the heat they surely are also warming the battery too. No different to the advice/suggestion to keep your spare camera battery under your armpit or inside pocket in your coat ready for use.
Click to expand...

Sangoma said:
Canada, Saskatchewan????
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The prairies. And hand warmers aren't warm enough down to -30'c. They truly suck. And most hand warmers if you read carefully on the back they say not to hold them against your skin or serious burns could happen. Like those warnings on coffee cups that warn you that the coffee is hot enough to burn.

So the question is where do you place a hand warmer if you can't place it in your palm or anywhere it's exposed to skin. The working idea is to place them in a winter coat jacket pocket near your waist. Then place hands on warmers for a bit until it hurts and release. And redo again etc.

I worked with rebar down to -60'c with nothing but leather garden gloves and cotton inserts. The only time you need hand warmers is when your just standing around doing nothing.
 
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