1100 Backup Battery - Lenovo T420 Maintenance Manual

1100 Backup battery

For access, remove these FRUs in order:
• "1010 Battery pack" on page 65
• "1050 DIMM slot cover" on page 71
• "1080 Keyboard" on page 75
Table 19. Removal steps of backup battery
DANGER
Use only the battery speciied in the parts list for your computer. Any other battery could ignite or explode.
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ThinkPad T420 and T420i Hardware Maintenance Manual