 On the Circuit Python Parsec today, I wanted to show you how you can monitor your battery voltage in Circuit Python. So here we have a Feather M4, and this and a number of our other boards, especially ones that have a battery input, have a pin, one of the analog pins, that can be used as a voltage monitoring pin. It is not broken out onto the board. It is just used sort of internally as a voltage divider to tell you what the voltage is on the battery. So here you can see, I'm going to go ahead and plug in this little battery here. And in the REPL, you will see it's going to start saying voltage is 3.9 volts. It's good. So what I can do now, and you can ignore the voltage when I unplug it, it's actually I think just pulling whatever the voltage regulator value is. When I plug in another battery, this is a big, fat battery I had sitting around and hadn't used in a long time, there, this one says, hey, 3.0, 3.05 volts is low. It's time to charge. So this is able to detect the voltage coming from your battery, which on these lipos is a pretty good indication of when it's time to charge. They can start at around four or so volts. And when they are at 3.7, that's sort of their sweet spot. When they start to sag below that, that's when you know it's probably time to charge them again. And so the way this works is I have from analog IO, import analog in, that allows me to read an analog input, one of the ADCs. And then I'm setting up this variable, VBAT voltage equals analog in board.voltageMonitor. Not all boards have this, but I'll show you on another parsec how you can create your own if you need it. But this is an internal pin that's used to monitor that voltage. Then we have a little function here, which just converts that from the analog 16-bit value into volts. And then in the main loop here, I have battery voltage variable equals getVoltage, VBAT voltage. So it's going to go and return that as the voltage from the analog read. If that value is greater than 3.7, I print out, hey, that's good, and print out the actual value. And if it's below that, then we say, hey, it's time to charge. And then we repeat that every two seconds. So that is how you can monitor your battery voltage on your microcontroller inside of Circuit Python. And that is your Circuit Python parsec.