Thai soymilk company Vitamilk has rolled out a rather interesting advertising vehicle in the form of a large signboard dubbed that takes batteries that are at the end of their working life and squeezes enough extra power out of them to charge smartphones. The company is using this "Dead batteries for Dead Batteries" campaign to (rather obscurely) promote the people-powering attributes of its product, but the part we find interesting is how it highlights our lingering indifference to wasted energy in the consumer electronics age.
The argument is that each battery that is thrown away has about 400 mAh of power remaining. After all, most users throw away a battery as soon as the device it is powering starts to show signs of not working properly. This, of course, translates to wasted energy, which is never a good thing.
Created for Vitamilk by BBDO Proximity Thailand, the signboard allows passersby to donate used batteries and give them a new purpose before they are (hopefully) recycled or (more likely) consigned to landfill. It can hold up to 1,500 batteries, which translates to about 150,000 mAh of power, or enough to fully-charge 140 smartphones.
In the two months the board has been in use, the dead battery bank has apparently given out an estimated 3,328 hours of talk time to phone users.
Check out Vitamilk's promo video below to see the battery wall in action.
Source: Brand Buffet on YouTube via CampaignBrief
it;s like every other day too, someone says, can i make a generator so i can power my house from a bicycle?
or, can we make electric bicycles with brakes that recharge the batteries?
perpetual motion! not
wle
wle
There are free plans on the web to build your own. A common use for it is an electric "candle" with a single white LED, capable of running for several days off a nearly dead AA cell and much longer off a new one.
That dead "batteries" board doesn't run on batteries, it runs on AA cells. A battery is composed of two or more cells. Collectively the entire device is configured as a battery with 1500 AA cells.
What I'd like to know is how it's arranged electrically, does it individually monitor each cell? How does it indicate when one is completely dead?
Years ago I saw a comedian who built a working battery powered battery charger. IIRC it had to use 16 C cells to charge two. Then he had a second one with either 32 or 64 C cells to charge the 16 for the first one.