This battery replacement procedure can be used for Bose SoundLink III 330107 359498 330107A 359495 330105 or Bose soundlink Bluetooth Speaker II 404600, when your speaker battery is low or drained, you can remove the battery from the product and insert a new one.
To learn how to replace a Bose battery, see the steps below -- Removing and Installing the Battery.
To remove the battery:
1.Using the 2.5 mm hex wrench supplied with the replacement battery, remove the two screws at the bottom of the speaker
2.Push up on the back of the cover until it slides up slightly
3.Pull the cover up and away from the speaker back
4.Using the 2.5 mm hex wrench, remove the two screws securing the battery (located near the bottom of the speaker)
5.Pull the battery straight out of the speaker
To attach the battery:
1.Replace the screws in the battery and tighten with the 2.5 mm hex wrench
2.Align the holes inside the cover with the anchor posts on the back of the speaker, and press the cover into place
3.Slide the cover down on the anchor screws until it stops
4.Replace and tighten the screws in the bottom of the cover
Picture source: (BOSE.CN)