Panasonic Toughbook CF-C1ADAAZ6M Reference Manual page 49

Battery Power
<CF-C1 Series>
Adding the Second Battery Pack
When using your computer with a battery pack, you can insert the second battery pack.
Proceed as follows.
1
Turn your computer over.
2
Slide the latch corresponding to the battery compartment to which you are going to insert
the second battery pack, and remove the battery bay weight saver.
3
Slide the second battery pack into the battery compartment until it clicks to the secured
position.
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