JBL GO AC power

https://www.amazon.com/KNACRO-Adaptor-Lithium-Battery-automatically/dp/B01G9UDWRW

去逛了台北光華附7
近的源達電子，居然發現有這種東西。
就將上次JBL GO的電池盒改接上這個4.2V 1A變壓器。

這樣就不須需要使用18650電池了。
可以直接使用AC供電。
有需要移動再換成電池盒。

sound blaster roar2 battery replacement

https://youtu.be/2LM8hpk3rZM

You must remove all the screw (red point), and you can split the case.
I did not remove the green PCB, and I did not remove the black cloth.
Carefully open the case, do not fully open. I just open a little, and you can pull out the battery.
Thanks the youtuber Dennis low.

https://forums.hardwarezone.com.sg/hardware-clinic-2/creative-sb-roar-2-speaker-unable-charge-unable-power-5799187.html

ps:
Common issue, the battery is dead (or at least the charging circuit).

First, unplug the power and make sure no light, wait a while. Get ready your finger at the power button (but don't press yet). Then plug the power, once you see the light on, quickly press the power button, the speaker will turn on by power cable.