# Power Management Unit (PMU)

![](https://1542051135-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LU5o-Ac6o-JIpVeYPKs%2F-LXy1N9ZNkeUqEP9Z0Or%2F-LXy25AjC9Uj3RP32z7m%2Fpmu.png?alt=media\&token=5c48508a-e4b6-480a-bf58-e2746893cdb9)

Along with the numerous drone parts Drotek is selling, Drotek has developed a couple of boards related to the power management operation inside of embedded electronics in general. At the end of this year 2017, Drotek created a [new power management unit,](https://store.drotek.com/power-management-unit-pro) built to provide a solid and reliable power supply for as many projects as possible.

Designed to perform with drones, it is plug-and-play with the Pixhawk 3 PRO autopilot that Drotek released the same year.

You will find more information on this [page](https://drotek.gitbooks.io/power-management-unit-user-guide/).

## SOFTWARE

To configure your Tiny module under QgroundControl, go to the "Power" configuration window.

* Number of Cells (in Series): enter here the number of cells in your lipo battery, this parameter is indicated on your battery by the words 3S, 4S ......
* Full Voltage (per cell): leave this parameter by default `4.05`
* Empty Voltage (per cell): leave this parameter by default `3.40`
* Voltage divider: `15.9`
* Amps per volt: `37.51`


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