Nokia 9290 - Manual (Page 302)

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Reference information
When making an emergency call, remember to give all the necessary information
as accurately as possible. Remember that your communicator may be the only
means of communication at the scene of an accident - do not cut off the call until
given permission to do so.
Important power supply information
WARNING: This apparatus is intended for use when supplied with power
from a Lithium-ion battery and chargers ACP-12U and LCH-9.
Other usage will invalidate any approval given to this apparatus
and may be dangerous. Use only batteries, chargers and
accessories approved by the communicator manufacturer for
use with this particular communicator model. The use of any
other types will invalidate any approval or warranty applying
to the communicator, 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.