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Backup Battery (RTC)
“Battery ASM” on page 62
“Modem Card” on page 68
Safety Notice 4: Translation on page 7
The backup battery is a lithium battery and can cause
a fire, an explosion, or severe burns. 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 of the battery as required
by local ordinances or regulations. Use of an incorrect
battery can result in ignition or explosion of the
battery. Replacement batteries can be ordered from
IBM or IBM Authorized Dealers.
Use your thumb first to pull out the backup battery (RTC).
ThinkPad 390E 69