Many designers have explored prototypes along these lines, only to find that there are logistical difficulties making them hard to put into daily use. For disasters or other emergencies, though, this neat little self-contained wind-up charger would be a handy addition to your BOB (bug out bag) or GOOD (get out of dodge) bag.
One problem is moving parts – regular recharges could wear down the delicately-balanced moving pieces that make the design work. Another is capacity, reduced to accommodate the crank, knob, spring, dynamo and so forth. Yet another is charging time, which would be long if one had to wind it by hand – not efficient for everyday applications – though a regular charging station could be used, too.
These limiting factors aside, though, the design itself is compact and compelling – shaped and sized like other AA and AAA batteries, the winding element folds neatly back into the body so the unit can travel without breakage and be put into ordinary devices. Given how entrenched these objects are in our culture of omnipresent electronics, any solution along these lines has to factor in such standards – and this idea does that well. (Design by Qian Jiang)
More from the designer
“This new type of rechargeable battery is charged by manual rotating spring charge. The conventional battery charger can supply power as well. Its most prominent feature is when there is no charger, the users can twist the wind-up to charge, convenient and fast. It’s not only suitable for home but also for field. Particularly in long-distance travel and exploration. Because of rechargeable, wind-up battery is very environmental friendly.”
“In the future battery storage capacity will ground the standardization of the battery will continue for a long time. The wind-up design can also be used in the same way on AAA battery and so on. This design is the example of AA battery.”