1. Can't charge while the light is on. (i.e. while riding)
(I read in the description saying "charge on the go". But you can't).
2. Even at the lowest brightness, it lasts only for 5 to 6 hours. Unlike the proclaimed 8 to 10 hours. So if you're planning to ride for more than 4 hours in the dark, better to carry another light. Cause you can't charge while it while it's on.
NiteRider Swift 500 Rechargeable Front Light
Very bright light and sturdy product, effective in dark conditions
Very nice product and light.
The product is good