Fitbit Blaze Battery Replacement

Locate the front LCD screen on your device.

Push the screen out through the back of the metal ring enclosure.

Locate the metal pin behind the wristband located on the edge of metal ring.

Insert the pointed end of the metal spudger into the pin hold and push it into the blue rectangle enclosure.

Remove wristband.

Place device screen face down and locate the four screws attaching the back cover.

Use a T3 torx head or T3 torx screwdriver to remove the four screws.

Grab the back, lift and open like a book to expose the motherboard. Locate the ribbon connector on the left.

Use a plastic spudger tool on the ribbon connected from the heart rate monitor to the motherboard.

Insert and lift the plastic opening tool to release the ribbon.

Separate the back and set aside, locate the three screws attaching the motherboard.

Use a PH000 head or a PH000 screwdriver to remove the three screws.

Use a plastic spudger tool on the ribbons connected to the motherboard.

Insert the tool under the ribbon and lift to release the connection.

Lift and push the motherboard to the side to uncover the 167mAh battery.

Use a plastic spudger tool to pry out the battery from its adhesive plastic underneath.

Lift up and pull downward to remove battery. Switch to the top portion of the battery and push downward to pry out battery.

Flip the motherboard backwards and locate the metal pins from the battery soldered to the board.

Desolder the connection to remove the battery, desolder the battery connector itself if desired as well.

Follow this guide on how to solder and desolder connectors Soldering Guide