This series of insulated low profile coin cell retainers are suited for high density PCB packaging. The unique, patent-pending design protects the battery from shorting if inserted incorrectly. These new retainers also allow the user to stack two 20-mm cells on top of each other to achieve six volts of power from the same board footprint or for single cell three-volt applications. The retainers are rugged yet lightweight, with clearly marked polarity, and are designed for both lead-free solder and traditional reflow processes. The solder tails located outside the insulating material, support visual inspection systems.