Please watch: "Top 5 Budget Knives for 2018 presented by Shortcut Reviews"
   • Top 5 Budget Knives for 2018 presente...   ~
3 Streamlight Microstream Flashlights and some Flashlight Technology Talk by Shortcut Reviews

This video is about batteries, chargers and lights, and their usage.
I draw a big distinction between tactical and EDC lights.

Battery Tester:
https://www.amazon.com/DiymoreLithiu...

Battery Holder:
https://www.amazon.com/gp/product/B01...