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After further investigation, it seems that the most important factor when storing an emergency flashlight in your car is the battery. Ideally, you want a battery that...

• can deal both with extreme cold and heat
• has a very long shelf life
• can't leak or explode

And by far the best option to tick all these boxes seem to be non-reusable AA lithium batteries (not to be confused with alkaline or rechargeable lithium-ion batteries). So what you want is a flashlight that can run off AA batteries and has a mechanical power button to prevent parasitic drain.

With all that in mind, I went with an Acebeam Pokelit AA. Let's see how it treats me.

Thank your for reading my blog post.