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1090 Backup battery
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For access, remove these FRUs in order:
v “1010 Battery pack” on page 60
v “1020 Second battery or travel cover (some models)” on page 61
v “1070 Keyboard” on page 72
Table 20. Removal steps of backup battery
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When installing: Make sure that the battery connector is attached firmly.
Use only the battery specified in the parts list for your computer. Any other
battery could ignite or explode.
ThinkPad X300 77