Dell Inspiron 15 3530 Owner's Manual page 55

Steps
1. Unroute the battery cable from the routing guides on the battery.
2. Open the latch and disconnect the battery cable from the connector on the battery.
NOTE: To disconnect the battery cable, first push the latch downward to release the connector, and then pull the
connector upward to disconnect it from the battery.
Removing and installing Field Replaceable Units (FRUs) 55