Plantronics Headphone Battery Replacement

The red markings show the positions of breaking/fixing points inside the case, which are slightly glued. Nevertheless, the case can be opened without too much damage using a small, sharp screwdriver. The fix at the back of the headset at position 1 is clipped inside the case, rather than glued (see clip at steps 4 and 11).

Use a small, sharp screwdriver to open the case carefully, starting at position 1.

You will likely damage the case a little bit. First, open 2a and 2b with a sharp screwdriver.

Then, open 3a and 3b with a sharp screwdriver.

Very carefully open 4 with a sharp screwdriver.

The case is glued and sealed with foam at 4.

Remove the foam from the case.

The two loudspeaker wires are quite delicate, so take special care with them as you continue to work on the headphones in future steps.

If the power connector is glued into the case, then de-soldering it is the easiest solution. If it is not glued, then de-soldering is not necessary.

Be sure to remove assembly carefully.

De-solder the battery positive (+) and negative (-) cables from the circuit board.

If the battery is glued with a piece of foam, then cut it with sharp knife.

Exchange the battery with the new replacement.

The replacement battery in the picture worked perfectly for the Plantronics B70.

Cut and prepare the replacement battery cables for soldering.

Solder the new battery to plus (red cable) and minus (black cable).

Fix the new battery onto the foam and place it in the center of the position, which is marked by a white line.

Carefully put everything back into position. Re-solder the power connector, if it had to be de-soldered before. Fix it back into the round hole.

Close the case with the clip 1. The black and silver case can be fixed best using some transparent tape around the case.