Epson Equity 320SX PLUS - Manual (Page 108)

If necessary, follow the instructions on page 5-2 to remove
the computer’s cover. Then follow these steps to replace the
battery:
1. The battery is attached to the bottom of the computer
case, just behind the front panel, as shown below.
To disconnect the battery from the main system board,
pull up on the connector plugged into socket CNl, as
shown below.
6-6 Installing and Removing Options