Metrohm Power Box (for 899 Coulometer) - Manual (Page 19)

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4 Operation and maintenance
Power Box
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4.6 Replacing the batteries
Warning
Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.
There are no parts inside the housing which can be serviced or replaced
by the user.
Contact your local Metrohm Service to replace dead or defective batteries.
Note
Warranty
The batteries are considered consumables. A 6-month warranty is gran-
ted starting from the day of delivery.