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givedesignachance:

Renew Solar Battery Charger by Donn Koh in teamwork with Tracy Subisak & Herlinda

Via a unique vertical configuration, sorting and storage is integrated, automatic, and effortless. All the user has to do each time is to drop in a depleted battery from the top, and retrieve a fully charged one from below. No need to sort, store, and keep track of your batteries. It’s like having a dispenser in the home that provides an endless supply of AA batteries!

Within the channel, the batteries are continuously charged - and because they are loaded from the top and retrieved from the bottom, this effectively sorts them from the least to the fullest charged without any conscious effort. You’ll always get the fully charged one and never have to guess.

More about it: Behance