Review on 🚲 BikeSpark G3-35 lm Auto-Sensing Rear Light: Super Bright LED Bike Tail Light with Motion Sensor - USB Rechargeable & Water Resistant IPX5 - Made in Taiwan by Ardy Espinoza

I was a little skeptical when I bought them but was pleasantly surprised at how well they work. The light detects when it's moving and when it detects it's slowing down, the brake lights come on. In the absence of braking, you have two options for modes: double flash or steady light. Obviously, always-on mode shortens battery life. There is a built-in battery that is not removable. For charging, there is a micro USB port on one side to charge your device. It also has an auto-off sensor to save battery power. He realizes that there hasn't been any movement for a while and the lights go out. As soon as the device moves again, it starts blinking again. The bracket allows vertical or horizontal installation. It features 2 attachment options, a rubber band to wrap around the bars and a plastic clip to attach to a belt or other thin object. The battery lasts for several days, but I only use it for a few hours at a time. Overall I was surprised how well the automatic part of the brake lights worked, I'm very happy with it.