Sofirn kindly provided the BS01 Smart Bike Light for review.
It has a flat top 21700 cell.
Here is my review:
timmcmahon.com.au
It has a flat top 21700 cell.
Here is my review:
![timmcmahon.com.au](https://timmcmahon.com.au/img/sofirn-bs01-left.jpg)
Sofirn BS01 Smart Bike Light Review
The Sofirn BS01 is a relatively affordable Smart Bike Light with a built-in 21700 cell, USB-C charging and a power bank feature.
![timmcmahon.com.au](https://timmcmahon.com.au/img/theme-colors/green.png)