---
title: Power Supply
urlSegment: power-supply
sidebar:
  order: 500
redirectFrom:
  - en/atime/power-supply/
slug: "en/atime/getting-started/power-supply"
lastUpdated: 2026-09-15T14:23:54.000Z
---

It is possible to charge the internal battery with the power supply PS12A that is coming along with the ATime. Additional you could connect an external 12V battery or power bank to supply the ATime.

When connecting the power supply PS12A the ATime will start automatically. It needs the active processor in the ATime for intelligent and fast charging. In the display in the right upper corner, it shows the battery level in percent.

* ![](/_assets/atime/36fe3b7d287081040439fa576c205c030dc54f4ac87d6488229cc42b9aefa726/battery-low.svg) battery has 8% capacity and is low (red background)
* ![](/_assets/atime/0f55e880e19f20c083d2cfd4d35804b137c171acb1bafd5aafc2efd2530ef97b/battery-normal.svg) battery has 62% capacity and is not connected to an external supply (dark gray background)
* ![](/_assets/atime/92067e5ad2b91001270f300762ac2855231dc6ae87e104c50a99baaa3e5c17f8/battery-charging.svg) battery has 100% capacity and is connected to an external supply (green background)

When using the ATime with a connected power supply PS12A it will charge the internal battery and supply the ATime. In case of a power failure the internal battery of the ATime will take over and supply the ATime.

|                   |                                                              |
| ----------------- | ------------------------------------------------------------ |
| **Working Time**  | approximately 18 hours at 20°C with one printout per minute. |
| **Charging Time** | about 3 hours when the battery is empty                      |