I am sure about the danger of all li-ion batteries, if you google you can find news everywhere exploded phones or other devices also 18650s…
I don’t know anything about the electricity or electronics but I am totally agree now after some research, if they are used in serial connection without protection the danger I guess doubles or maybe more.
I want to use this flashlight while cycling so I don’t have time or equipments to test them all the time, I just want to use them charge them again and use again, also I see myself really stupid (or idiot like the title of the topic:) so I really do not want a bomb on my bicycle near my face.
Can anyone please recommend me a normal priced (not very expensive, if possible cheap:) 18650 with a fully working pcb protection to use 2 of them in serial connection?
I found this: Boost - Buy In Coins
What do you think? Are they original?