Using batteries to heat up water

http://www.amazon.com/ZODI-Outback-Battery-Powered-Shower/dp/B002L9A4BI/ref=sr_1_1?ie=UTF8&qid=1387808360&sr=8-1&keywords=zodi+battery+powered+shower

I think the gadget in the amazon link above is only for drawing or
propelling water without heating up the water, right?  You'll still need
sort of propane or a heating element that connects to a heat source
(car cigarette burner or a flame or an oven), right?


The link below indicates it's possible to heat up water with just batteries:
anyone know where I can buy a ready-made water heater (for shower)
that operates purely on batteries?
http://www.instructables.com/community/Battery-Powered-Water-Heater/
sunhuxAsked:
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sunhuxAuthor Commented:
The water at my place reaches 26-27 Celcius at night
& I just need to heat up the water to 35-36 Celcius for
shower
JohnBusiness Consultant (Owner)Commented:
The first link is for a non-heated pump. That is all it does.

The second link is experimental and it would appear it needs a lot of battery power to heat the water.

I have not seen a battery operated water heater (because of the high level of wattage to heat water). Someone may have seen one but I have not.

Solar powered water heaters might be a lot more effective for you if you normally have lots of sunshine.

.... Thinkpads_User
sunhuxAuthor Commented:
Thanks Thinpads_User, I was contemplating that as well:
it rains about a quarter of the time here though it's a
tropical climate here.

Even a heating element that's battery operated would
meet my need:
http://www.hydrogenappliances.com/hotwater_wh12FZ1but.html



But I guess at that price, I might as well a couple of the solar-
powered thermos below which will self-seal the hot water &
I could pour them out into the pail at night:

http://www.amazon.com/Portable-Water-Heater-SunRocket-Sunlight/dp/B0098IW9JU/ref=sr_1_2?ie=UTF8&qid=1386860981&sr=8-2&keywords=solar+powered+heater
JohnBusiness Consultant (Owner)Commented:
The battery one looked like it was using a car battery and need a 50 amp charger. So as I noted, the battery heater uses lots of power.

The other one looks interesting however, but I have never used such a thing.


.... Thinkpads_User

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JohnBusiness Consultant (Owner)Commented:
@sunhux - Thank you very much and I was happy to help. It was an interesting discussion indeed.

... Thinkpads_User
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