We know that power failures are the worst for our network infrastructure. This can drive the administrator into a not insignificant drama and end up tearing hair out of the head
![Płacz :cry:](./images/smilies/icon_cry.gif)
Connection of a charging power supply with a battery will allow for cheap way of powering monitoring or network equipment.
For 12V voltage we recommend the following sets:
1x any Extralink battery + AD-155A or AD-55A power supply with charger
For 24V voltage we recommend the following sets:
2x same Extralink batteries + AD-155B or AD-55B power supply with charger (different power)
For 48V voltage we recommend the following sets:
4x 12V Extralink batteries + AD-155C power supply with charger
For confirmation see our video, where we test the antennas using such a power supply. Enjoy watching
![Wyluzowanie 8-)](./images/smilies/icon_cool.gif)
![Obrazek](https://img.youtube.com/vi/nF8hHC7tLfU/maxresdefault.jpg)