I just saw this video from someone who just came back from guide dog class at GDB. She’s showing off something new that they sell, called the Audio Beacon Safety Light.
Its most important function is to light up at night so that you can be seen. But it has a very cool feature of letting you know whether the light is on or off with beeps. Some of us can’t see light at all, so might turn the thing on without wanting to and then run down the battery. And some of these safety lights have fiddly or hard to replace batteries, so once it’s gone, it’s gone! Also, this thing is rechargeable, so you never end up running down the battery and then ruining your device.
I’m probably going to get a couple of these when I’m in class.