This quirky looking eco-friendly calculator is powered by free energy. Simply fill the three water-powered batteries to the brim and plug them in to the face of your calculator!

Water-powered batteries consist of two electrodes that are made out of special alloy. When you immerse the electrodes in water they produce electricity through an amazing chemical reaction!

Just refill the batteries as the water evaporates from the cell (typically every 2 or 3 months). It's easy to tell when you need to top up since the batteries are clear like the calculator. Very cool!

With eccentric green buttons and similar battery plugs, this calculator is a fascinating feature for your desk. The batteries will last for a minimum continuous life span of two years!

Recommended for ages 10 and up.
Dimensions: 14cm x 7.5cm

SKU HYD01
Barcode # 612615045743
Product Box Weight 0.190kg
Peter and Anne-Maree
Hello from Peter & Anne-Maree

CoolThings Australia is a Australian family owned & operated small business located in Launceston, Tasmania.

The CoolThings Australia mission is to help you be the coolest gift giver in your family and circle of friends.

You know the feeling you get when you give a gift and the response is "That's so cool!" - that is what its all about!

CoolThings Australia was started in 2003 by Peter and Anne-Maree and is still led by them to this day. Their purpose in business is to be givers themselves and they support multiple charities and organisations close to their hearts locally, nationally and internationally.

Both Peter and Anne-Maree and their team of cool gift-o-l-o-gists thankyou for your support and are looking forward to serving you today!

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(5) Renee - Verified Customer

I purchased astronaut food and a prank golf ball for my 15 year old son, as stocking fillers for Christmas. Amazing. They arrived quick. Well packaged. And I know my son will love them. I hope I get to try some of the astronaut food. I have never seen that before. If not... I will be placing an order after Christmas for more. ...

(5) Anonymous - Verified Customer

the purchased product was unique and unusual and the company offered a wrapping and message service. delivery was very prompt. all round, very satisfied....

(5) Sherril g - Verified Customer

Love the size and how it works...

(5) Garry Waldron - Verified Customer

I recently purchased the Back To The Future OUTATIME License Plate Mug . I must say it was a pleasure to order through coolthings they supplied me with tracking information and estimated delivery date. My order arrived as per the estimated date and very well packaged. Thanks for the great service coolthings.....

(5) Anonymous - Verified Customer

CoolThings.com.au have really coolthings!!! I found this little gem just recently and have now placed my second order. Their communication is outstanding and my purchase arrived when promised. I highly recommend this company!!! Many thanks Sue...

(5) Anonymous - Verified Customer

Everybody took a trip down memory lane with Duncan the drinking bird . Happy times back in the 70s...

(5) Kym S - Verified Customer

Purchased two novelty miniature musical instrument desktop toys to take to work to amuse the office. Products are excellent and well packed for safe postage. CoolThings communicated the order and shipping details promptly, and items were sent and received quickly. Happy to recommend CoolThings and now that I know of them will likely purchase again....

(4) Kerryn - Verified Customer

My goods were exactly what I expected, I was told exactly where my parcel was and how long it would take to get to me. Everything was just so cool, as the name suggests. Love your stuff, it's so different....

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