Backup Battery (RTC)“Battery” on page 61
“Modem Card” on page 68
Safety Notice 4: Translation on page 8
The lithium battery can cause a fire, explosion, or
severe burn. Do not recharge it, remove its polarized
connector, disassemble it, heat it above 100°C
(212°F), incinerate it, or expose its cell contents to
water. Dispose the battery as required by local ordi-
nances or regulations. Use only the battery in the
appropriate parts listing. Use of an incorrect battery
can result in ignition or explosion of the battery.
Use your thumb first to pull out the backup battery (RTC).
ThinkPad 390X / i 1700 HMM 69