Review on Ascher USB Rechargeable Bike Light Set - Ultra Bright Front Headlight and Rear LED Bicycle Light with 650mah Lithium Battery - 4 Light Modes (Includes 2 USB Cables and 4 Straps) by Corby Muin

At first I thought they were great lights, probably like most people who write a review 10 minutes after first using the product. I've had these for 3 months now. A light burns for no more than 4-5 hours, while the product documentation states 10 hours of battery life. These are all good for cyclists but I use them on a motorbike and am often out for more than 4 hours. 40% - 50% of the promised battery life I find a bit disappointing. These lights have so much potential. I like the belt attachment system. I use them on my backpack when I ride and the straps work great with the MOLLE system on my 5.11 Tactical Rush 12. I just want the red one to stay lit longer in this case. Update: I was offered a coupon by the manufacturer to get a new light for free. Upgraded to 3 stars for excellent customer service. I'll try a new light (red in my case) and report back here. Update 2 (November 29, 2017): I tested the new red (back) light and at least for now the light stays on full power. more than 5 hours. Double the service life as promised in the product documentation. So I'm happy with the replacement. I will use these new lights and update them later.