Like the primary-gen model, the battery is replaceable and can be accessed through hidden screws on The underside of the speaker. Bluetooth connectivity is from the SBC range, and while it will have been good to check out AAC at this price, sound remains to be great but should https://www.bluetoothspeaker.top/bass-high-quality-loud-bt-tws-bluetooth-ipx6-outdoor-waterproof-wireless-bluetooth-speaker/