For the ultimate in versatile light attachment, there’s Blackburn’s Mars Magnetic Taillight. The unique magnet clips onto fabrics, from shirt collars and backpacks to jersey pockets and panniers. You can also strap it to your bike via the silicone band. 2 bright, red LEDs will flash for 50 hours on a single coin battery.
Run Time: 50 hours (flash)
Coin battery (CR2032) included