I recently got a cygolite hotshot 2w rear light. Being a curious person, I disassembled it to see it I could find out the capacity of the rechargeable battery. Mission accomplished, it is 830mAh 3.7v Li-ion battery.

What I am wondering is hot does the light perform as the battery is running low/out of battery? Their is a secon small LED that flashes while charging, I am wondering if it flashes when the battery gets low?