# Operation with Lithium-Ion Battery Pack

## Inserting/Replacing a Lithium-Ion Battery Pack

To switch from non-rechargeable or NiMH batteries to a lithium-ion battery pack (12), press on the locking mechanism (15) of the battery compartment cover. Remove the battery compartment cover (16) and the inserted non-rechargeable or rechargeable batteries.

Insert the lithium-ion battery pack (12) and let the locking mechanism (11) click into place.

To remove the lithium-ion battery pack (12), press the locking mechanism (11) and take the lithium-ion battery pack out of the measuring tool.

## Charging a Lithium-Ion Battery Pack

- For charging, use only a USB power supply unit whose output voltage and minimum output current comply with the requirements in the "Technical data" section. Observe the operating manual of the USB power supply unit.

- Pay attention to the mains voltage. The voltage of the power source must match the voltage specified on the type plate of the power supply.

- Only use the USB connection to charge the battery at an ambient temperature of between +10 °C and +35 °C. Charging outside of this temperature range can damage the battery and increase the risk of fire.

Note: Lithium-ion rechargeable batteries are supplied partially charged according to international transport regulations. To ensure full rechargeable battery capacity, fully charge the rechargeable battery before using your tool for the first time.

Open the flap for the USB Type-C® port (13). Connect the USB port to a USB power supply unit using the USB cable (10). Connect the USB power supply unit to the mains supply.

Colour of charge indicator (14) | Meaning
--- | ---
Yellow | Lithium-ion battery pack is being charged.
Green | Lithium-ion battery pack is fully charged.
Red | Charging voltage or charging current is unsuitable.

It is not possible to take measurements during the charging process because the measuring tool cannot be fully placed on the surface.

Remove the USB cable (10) after completing the charging process. Close the flap for the USB Type-C® port (13) to protect it from dust and splashes.