1070 Backup Battery - Lenovo ThinkPad X220 Hardware Maintenance Manual

• In models with a wireless LAN card that has two antenna connectors, plug the gray cable into the jack
labeled MAIN or M on the card, and the black cable into the jack labeled AUX or A. If the computer you
are servicing has three cables, put the white cable in the cable protection tube.
• In models with a wireless LAN card that has three antenna connector, plug the gray cable (MAIN) into
the jack labeled TR1, the white cable (third) into the jack labeled RO or TR3, and the black cable (AUX)
into the jack labeled TR2 on the card.

1070 Backup battery

DANGER
Use only the battery specified in the parts list for your computer. Any other battery could ignite
or explode.
For access, remove these FRUs in order:
• "1010 Battery pack" on page 62
• "1040 Keyboard" on page 67
• "1050 Palm rest or palm rest with a fingerprint reader" on page 69
Removal steps of backup battery
.
Chapter 8 Removing and replacing a FRU
73