2x 18650 To 3x C Cell Batteries

thingiverse

Sleeve to allow use of 2 18650 Lithium ion in place of 3 C cell batteries. Particularly useful in my Nerf Rival Charger blaster with very little modification Requires one 10-24 x 1/2" screw which may require some modification depending on how the positive side contact is shaped or shielded in your device. For instance, I decided to grind the outer diameter of the head down on the screw I used in order to ensure good electrical contact in the Nerf blaster battery compartment. Features a small indented ring on the positive side end cap to ease prying the tube out of a battery compartment. Warning label is facetious. Lithium ion cells will probably not explode if you put them in backwards. However, those little tubes pack a ton of energy so in general be very careful, use only cells that are in good condition and follow all proper steps in charging and discharging cells.