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Flashlights shell use a large number of materials. We designed a battery that can replace the shell.
Co-Battery can link each other end to end. It can be screwed into a lamp directly and became a flashlight. Firstly, remove the lamp cap. Then screw the batteries into the lamp and hold the cap to the bottom. After that, you can use the light. Of course Co-Battery can also be used as ordinary battery.
Co-Battery saves materials of the flashlights shell. Its easy to take and replace. Modularized parts make it convenient to assemble.