Battery connectors are typically used with portable hand-held devices that require docking for re-charging.  A newer application is to use these connectors as a one-piece solution to providing power between stacked boards.  This connector however cannot mechanically connect two boards safety. Circuit traces on the top board simply mate with the battery on the bottom board and power is transferred. This eliminates the need for a second connector or jumper cable between the boards. In such applications, the battery connector can be used in conjunction with AVX series 9158 one-piece stacking connector which provides a one-piece path for signals between the boards.