Nokia 7210 User Manual page 12

Safety first
Warning: Use only batteries, chargers and accessories approved
by the phone manufacturer for use with this particular phone
model. The use of any other types may invalidate any approval or
warranty applying to the phone, and may be dangerous.
For availability of approved accessories, please check with
your dealer.
When you disconnect the power cord of any accessory, grasp and
pull the plug, not the cord.
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