Bose NC700 Battery Replacement

crwdns2936071:01crwdne2936071:0 — Remove the ear pad from the left cup

Use a plastic card to remove the ear pad from the left cup. Slide the card into the slot and make a rotating motion.

crwdns2936071:02crwdne2936071:0 — Remove the screws

Remove the fabric cover and remove the four screws using a Torx TR6 screwdriver.

crwdns2936071:03crwdne2936071:0 — Disconnect the cable and remove battery

Carefully disconnect the flex cable.

crwdns2936071:04crwdne2936071:0 — Remove battery

The battery is glued to the case. Use a knife to carefully cut off the battery. Take care not to damage the battery!

crwdns2936071:05crwdne2936071:0 — Remove the shell from the battery.

Remove the shell from the old battery.

crwdns2936071:06crwdne2936071:0 — Remove the controller from the old battery

Cut the controller from the old battery.

crwdns2936071:07crwdne2936071:0 — Remove the controller from the new battery

Cut the controller from the new battery.

crwdns2936071:08crwdne2936071:0 — Solder the new battery to the old controller

Solder the new battery to the old controller. Observe the polarity!

crwdns2936071:09crwdne2936071:0 — Wake up the controller

Measure the voltage at the controller pins. You will most likely get 0 volts. It is necessary to wake up the controller.

crwdns2936071:010crwdne2936071:0 — Attach the controller

Attach the controller to the battery with tape.

crwdns2936071:011crwdne2936071:0 — Solder the battery

Solder the battery. Use heat shrink tubing or duct tape to insulate the soldering area.

crwdns2936071:012crwdne2936071:0 — Place the battery in the bottom of the cup

Place the battery in the bottom of the cup.