Battery replacement Philips BT3080 with 18650 Cell

This is the Philips BT3080B Bluetooth Speaker.

The top of the device hosts the different buttons used to control it.

On the bottom we have the battery compartment.

On the back there is a headphone jack and the USB charging port.

On the bottom of the device, start by removing the screw that is hidden underneath the sticker.

Remove the lid, and you should see a rectangular battery. You can unplug it and remove it.

On the bottom of the device, insert a spludger between the front cover and the bottom plastic housing.

Move from one edge to the other, do not insert your spludger too far, as there are plastic tabs that you will bump on.

Lift gently your spludger to avoid deforming the cover.

3 tabs are maintaining the front cover.

Moving to the top of the device, insert a mediator between the top cover and the back plastic housing.

Same as before, lift it gently to avoid deforming the cover.

3 tabs are maintaining the top cover.

The top cover is still cliped on the front edge.

Gently insert a spludger on the edge to lift the top cover.

With the spludger inserted, insert a mediator between the cover and the buttons panel.

3 more tabs later, the panel should come right off.

Remove the 8 philips head screws.

Tilt the front part.

Alternatively, you could probably remove the 2 screws to avoid putting stress on the cables.

Your speaker should be opened.

Unplug the battery cable from the mainboard.

Unscrew the 4 philips screws that maintain the battery compartment.

Keep these screws as they will be used later to fix the new compartment.

Remove the compartement by sliding it towards the speakers.

Unscrew the 2 philips head to remove the battery connector from the compartment.

3D print this part (available at https://www.thingiverse.com/thing:717819...). The design provided have been modified to avoid cuts that you see here. This was an early prototype.

Slide the connector you unscrewed from the previous step in the opening, by putting the mainboard connector first.

Slide the 3D printed compartement in the speaker.

Put back the 4 philips screws you got from step 9.

Plug back the battery connector on the mainboard.

Put back the front part (this picture is with the hold compartment).

The four tubes that maintain the screws might collide with the rest of the speaker. Do not hesitate to put a bit or strength here. Keep in mind the wires from the microphone and diodes that are at the front.

Put back the 8 philips head screws from step 6.

While you are here, verify that all the screws are tightened (also on the buttons panel).

Put back the cover.

First, clip the top part around the buttons panel.

Then clip the front part at the bottom of the speaker.

Solder the connector of the old battery to a 18650 cell.

Plug in the battery.

Screw back the battery panel.

Make sure that the speaker can still turn on (if it does not, make sure that all the connectors you can see in the previous steps are plugged in ).

Also, check the 18650 cell voltage.

If it does, congratulations, you have a speaker with an easy to find battery !