Be careful when you isolate the battery using a battery blocker. The battery contacts are easily bent or broken, resulting in irreversible damage.

Ensure that the iFixit logo on the battery blocker is facing up.

Slide the battery blocker underneath the logic board's battery connector at a 35 degree angle.

Don't push the battery blocker underneath the connector with excessive force. If you're having trouble fitting the battery blocker underneath the logic board, you can try using a playing card to disconnect the battery instead.

The battery blocker or playing card ideally should slide under the logic board without encountering any blockages. After insertion, it should rest at about a 15 degree angle.

Leave the battery blocker in place as you work.