- Jul 28, 2016
I am referring to the circuit inside of the portable and how can you add a battery life indicator to tell if the battery is charged or dead?
You don't have to remove the batteries to wire them, you wire a charging jack to your pcb, and connect it to the outside of the case.
Here's a diagram that shows you basically what you need to do: http://bitbuilt.net/forums/index.php?threads/charge-and-play.334/
When it's on, your batteries are powering your portable. When it's off, your charging jack is connected to your batteries, and you can charge them. If you don't care about being able to connect to wall power and play off that while charging your batteries, you can leave out that yellow power jack.