Review on Stay Safe While Cycling With G Keni Smart Bike Tail Light - Auto On/Off, Waterproof, USB Rechargeable, And Ultra Bright LED Warning Back Bicycle Flashlight! by Brett Tierney

Purchased 2 a little more than a month ago. One fully charges with three blue light indicators. The second only charges to two blues lights and of course dies on a 2 hour ride when it is supposed to last and last. Of course we were 1 day late in trying to return. I emailed the company and did not or have not yet received a response. The idea on these are great, the battery life and quality control as well as response from company-- MEH! THINK TWICE BEFORE PURCHASING!will update as needed.