The easiest and recommended method is to desolder the switch and remove it. If you have a soldering iron at hand and a desolder pump it’s easy to lift the switch away. Once the switch has been removed, just plug the battery into the Powerboost and connect it to the Raspberry Pi. It will be on by default when you plug the battery in.
If you don’t have a soldering iron you can physically remove the switch using pliers, but we recommend desoldering it if you can as there is a chance that you may damage the board if physically removing the switch.
Step 1. Use the pliers to remove the metal casing of the switch.
Step 2. Remove the second part of the switch. You may need to lightly twist it to remove it from the board.
Step 3. Continue to remove the remains of the switch and ensure that the pin soldered to LB isn’t bent and touching anything else. You should remove the switch but leave the pin soldered to LB on.