Mac’s petit inventions: Hungry Batteries

What if there is a set of rechargeable batteries that can change forms to tell you how “hungry” it is?

Mac’s Petit Inventions

Mac Funamizu shares with us his design ideas. He looks at everyday things and envisions their future.

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Say your TV remote suddenly stops working and you are trying to change the batteries. Then you remember you changed one of the two batteries just a couple of days ago. Which is it? Exchange one of them with a new one. No, not this one…

You might have had that experience. Guessing the right one out of two is okay, but what if there are four or even eight? What if you’re visually impaired? You don’t want to take your battery checker out of your dusty toolbox just to find out one old battery, do you?

So I was wondering if there is a rechargeable battery that can change its form to tell you how “hungry” it is. The thinner it is, the emptier the battery is. When it’s full, it’s just as straight as a normal battery. Even if your eyes are closed, you can feel it and know how much more you can use it until the next recharge.

Another merit is that when it’s thin, it’s much easier to take out from a packed battery room, especially if there are multiple betteries packed tight in line. Fat batteries don’t need to be changed anyway.

Mac Funamizu

Mac is an in-house web/graphic designer working in Tokyo, Japan. In his free time he invents new products and interactions.

5 comments on this article

  1. This is a great solution that would work equally well for printer ink cartridges, bottles of beer at a party, and books on a bookshelf. There would be great benefit across many areas if things that had already been used would reduce their size, thus reducing ttheir environmental impact and making unused items more prominent. But the manufacturing cost…that might be a bit high 😉

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  3. ZAM on

    Great idea Mac, though as Whitney said the manufacturing cost can be a bit high but the innovations like this will surely lead to great products in future.

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