Designed to be used with hearing aid test systems and drain meters, our BP-1 Battery Pill Sub Connectors are an inexpensive and sensible solution as a battery compartment connection device. The BP-1 models have a square tip and are designed to slip into the opening in the faceplate behind the battery door battery when opened. Our BP-1 is manufactured by hand to insure integrity and built to withstand rigorous use. Ultra-flexible cable allows optimum unit placement during test while minimizing cable interference.