If the battery clip of the Pentax AUTO 110 is lost or the battery compartment is damaged, you can make a new one. Use CR2032 batteries. The ISO adjustment becomes manual, and it is suitable for use with multiple rolls. The PCB is made of a 1mm thick double-sided board. After being fabricated, it is cut from the slot and the cutting edge is polished. The mainboard is soldered with the battery clip and switch. The bottom limit protrusion does not need to be soldered. If the plastic on the left and right sides of the original battery compartment is severely cracked, the battery will sink. After welding with 2.54-pin connectors, cut off the excess metal pins on both sides, and smooth the back surface for polishing. Without installing the rear cover, test assemble the mainboard and side panel, and solder the connection points. Remove it and solder the three wires of the original battery holder, which are s (blue), - (negative) is black, and + (positive) is red. Install the rear cover and reassemble it for use.