If you're tired of guessing how much battery life you have in your lights, the Thunder Blast fixes that with Serfas' blast audible warning system. The Serfas Thunder Blast Taillight gives you style and safety in one high- powered and affordable package. Capable of alerting you with a loud 85 decibel signal, the Thunder Blast let's you know when 10 minutes of battery life remains. This allows you to know when to turn down the power on your light to extend the run time to get you safely home. The beeping continues once per minute until the last minute of run time. This USB rechargeable light comes with 40 lumens of firepower while giving riders' several different rear facing mounting options with its' extra long straps. The Thunder Blast makes you visible up to 1 mile away, which will help keep you safe in the concrete jungle.
I love the brightness of this light and it is very easy to mount, but it scares me because I can't rely on it. When the light dies, it dies hard and fast. It doesn't dim over time or show other indications that the battery is low. It just goes out without warning. I always seem to get stranded out at night without a tail light, which is unsafe. The battery life is too short. Too, I really wish it used a micro-USB cable to charge--the same as most cell phones--instead of whatever size they went with.
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