Inserting/Changing the Battery
Using alkali-manganese or nickel metal hydride rechargeable batteries (especially at low operating temperatures) is recommended for operation of the measuring tool.
With 1.2 V rechargeable batteries, more measurements may be possible than with 1.5 V batteries, depending on the capacity.
- Open the battery compartment cover.
- Insert the batteries/rechargeable batteries.
When the state of charge of the non-rechargeable batteries or rechargeable batteries is low, a request to activate the battery saver mode will appear on the display. When the battery saver mode is activated, the battery runtime will be extended and the battery symbol on the display will have a yellow outline. see Switching On and Off Battery Saver Mode 
When the empty battery symbol first appears on the display, only a limited number of measurements are still possible.
When the battery symbol is empty and flashes red, no further measurements are possible. Replace the batteries or rechargeable batteries.
- Always replace all the batteries/rechargeable batteries at the same time. Only use batteries/rechargeable batteries from the same manufacturer and which have the same capacity.
- When inserting the batteries, ensure that the polarity is correct according to the illustration on the inside of the battery compartment.
- Take the batteries out of the measuring tool when you are not using it for a prolonged period of time. The batteries can corrode and self-discharge during prolonged storage.
- Never store the measuring tool without an inserted battery compartment cover (13) or lithium-ion battery pack (19) (accessory), particularly in dusty or humid environments.