Dell Precision M3800 (Late 2013) - Manual (Page 20)

3. Perform the following steps to remove the coin-cell battery:
a. Disconnect the coin-cell battery cable from the I/O board [1].
b. Lift up and remove the coin-cell battery from the computer [2].
Installing the Coin-Cell Battery
1. Replace the coin-cell battery in its slot in the computer.
2. Connect the coin-cell battery cable to the I/O board.
3. Install the:
a. WLAN card
b. battery
c. base cover
4. Follow the procedures in After Working Inside Your Computer.
Removing the mSATA Card
1. Follow the procedures in Before Working Inside Your Computer.
2. Remove the:
a. base cover
b. battery
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