Which battery powered switch can be used?

Hello,

I want to control my Yeelight RGB not only with smartphone or the regular light switch, but also some kind of battery powered switch (Like Philips Hue Dimmer Switch).

I am using Singapore server and Developer Mode - due to that I cannot use Xiaomi Gateway with Xiaomi Smart Switches (only works in China Mainland).

Any other idea of which switch to use that can be programmed to set certain scenes / turn on only certain group?

If you are not using IFTTT or Alexa, please choose China server. If you want to use Singapore server, you may look for some physical button with IFTTT support.