Hold the switch down for upto 30 seconds (long I know) it'll probably turn off after 6 or 10. If not just pull the battery out, on my one that I'm using now you just hold back a "spring clip" and pull the battery. What make/model is it.
OnePlus 5 review
See the work of famous artists playing with toys
iPad Pro 10.5in (2017) review
Comment faire une capture d’écran sur un Mac ?