Spring Battery
LATEST MECHANICAL ENGINEERING INNOVATION

People have been looking for ways to extend the life of a battery, be it a AAA, AA or even the D-size. What we have here is the ONE=TWO Spring Battery. The design is quite self explanatory.The spring basically extracts every little bit of juice form the battery!

People have been looking for ways to extend the life of a battery, be it a AAA, AA or even the D-size. What we have here is the ONE=TWO Spring Battery. The design is quite self explanatory.The spring basically extracts every little bit of juice form the battery!
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