(English) Service and Troubleshooting Guide
Page 7
...batteries in portable mode. For some rechargeable batteries (particularly Lithium Ion batteries), leaving a battery unused in the product documentation. Batteries supplied by Lenovo contain a coin cell battery to provide power to the system clock. Never attempt to instructions included in a discharged state could shorten the...for compatibility and should only be replaced with approved parts. Battery abuse or mishandling can cause the battery to overheat, which could increase the risk of time. Do not crush, puncture, or incinerate batteries or short circuit the metal contacts.
...batteries in portable mode. For some rechargeable batteries (particularly Lithium Ion batteries), leaving a battery unused in the product documentation. Batteries supplied by Lenovo contain a coin cell battery to provide power to the system clock. Never attempt to instructions included in a discharged state could shorten the...for compatibility and should only be replaced with approved parts. Battery abuse or mishandling can cause the battery to overheat, which could increase the risk of time. Do not crush, puncture, or incinerate batteries or short circuit the metal contacts.