TDK TREK Micro - True Wireless Stereo (TWS) Setup; Connecting Two Speakers for TWS; TWS Pairing Status Indicators; TWS Channel Assignment

4. With a small screw driver or other tool, lift
the battery assembly.
5. Unplug the connector.
6. Remove the old battery and insert the
replacement.
7. Plug in the connector and press the cable in
place.