Denso VS-G Series Installation & Maintenance Manual page 102

STEP 6
STEP 7
Disconnect the old backup battery that is right next to the new battery
connected in Step 5, and then connect a new battery (2nd one).
Old backup battery
Disconnect the old backup battery that is right next to the new battery
connected in Step 6, and then connect a new battery (3rd one).
Old backup battery
Note: Be sure to replace all of three batteries with new ones at one
time. Otherwise, the battery service life will become short.
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New backup battery
New backup battery