Lenovo ThinkPad X1 Carbon Setup Manual page 7

Notice for built-in rechargeable battery
DANGER
Do not attempt to replace the built-in rechargeable battery.
Replacement of the battery must be done by a Lenovo-authorized
repair facility or technician.
Only recharge the battery strictly according to instructions
included in the product documentation.
The Lenovo-authorized repair facilities or technicians recycle
Lenovo batteries according to local laws and regulations.
Notice for non-rechargeable coin-cell battery
DANGER
Do not attempt to replace the non-rechargeable coin-cell battery.
Replacement of the battery must be done by a
Lenovo-authorized repair facility or technician.
The Lenovo-authorized repair facilities or technicians recycle
Lenovo batteries according to local laws and regulations.
The following statement applies to users in the state of
California, U.S.A.
California Perchlorate Information:
Products containing manganese dioxide lithium coin-cell
batteries may contain perchlorate.
Perchlorate Material - special handling may apply, See
www.dtsc.ca.gov/hazardouswaste/perchlorate
Choking hazard notice
CHOKING HAZARD – Product contains small parts.
Keep away from children under three years.
Using headphones or earphones
CAUTION:
Excessive sound pressure from earphones and headphones can
cause hearing loss. Adjustment of the equalizer to maximum
increases the earphone and headphone output voltage and the
sound pressure level. Therefore, to protect your hearing, adjust the
equalizer to an appropriate level.
Excessive use of headphones or earphones for a long period of time at
high volume can be dangerous if the output of the headphone or
earphone connectors do not comply with specifications of EN 50332-2.
The headphone output connector of your computer complies with EN