AASTRA DT590 for MD Evolution User Guide EN - Manual (Page 149)

149 MD Evolution – Cordless DT590
Reference
Maintenance
Consider these suggestions and guidelines to keep your phone in
good shape and working properly.
Note: The phone does not contain user serviceable parts.
If your phone requires service, you should return it to the
supplier or retailer from whom it was bought.
Intrinsic safety
Do not use the phone and charger in conditions where there is a
danger of electrically ignited explosions.
Battery disposal
Defective batteries must be returned to a collection point for
chemical waste disposal.
Treatment
Do not expose the phone and charger to direct sunlight for long
periods. Keep the phone and charger away from excessive heat
and moisture.
Cleaning
Clean your phone with a soft cloth moistened with water only. The
use of soap and other cleaning products can discolor and damage
the phone. Clean the battery contacts using ethanol or isopropyl
alcohol.