Voltage Supply - TESTO 425 Instruction Manual

22 3. Production description
Important displays
Display Meaning
Battery capacity (bottom right in display):
· 4 segments in the battery symbol are lit: Instrument battery is fully
· No segments in the battery symbol are lit: Battery is almost spent

3.2 Voltage supply

Voltage is supplied by means of a 9V monobloc battery
(included in delivery) or rechargeable battery. It is not
possible to run the instrument from the mains supply or
charge a rechargeable battery in the instrument.
charged