ADE CK 1720 Mode D'emploi page 35

‚ Clean the battery and device contacts, as
needed, before inserting the battery.
‚ Only use batteries of the same type. Do
not use different types or used and new
batteries together.
‚ Do not make any changes to the item. Only
allow repairs to be carried out at a specialist
workshop. Repairs carried out incorrectly
can considerably endanger the user.
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