Pair of replacement, second revision, 3D printed rocker pieces for the pico-mac-nano battery power module. This version provides a tactile click into the on and off positions and is intended to replace there rocker on the early battery modules (current battery module already has the v2 rocker). To fit, remove the battery module from the pico-mac-nano, gently ease off the old rocker and then push the new one on firmly with the 'I' on the lower half.