djsfantasi
- Joined Apr 11, 2010
- 9,156
What are you plugging the battery into? There are jacks that will disconnect one source when a second source is plugged in. Think of a headphone jack (use your imagination, because I know this example is for output, but the principle is the same for inputs, such as battery power). Normally sound is heard through speakers. But plugging in headphones cuts off the speakers. I can draw a diagram when I'm on my laptop. In the interim, look at the schematic on this datasheet.
http://www.cui.com/product/resource/mj-3502.pdf
http://www.cui.com/product/resource/mj-3502.pdf