Fresh lithium batteries have a slightly higher voltage and less internal resistance than alkalines, so they'll allow more voltage to reach the LEDs, which means nice bright light—while it lasts!

The Surefire E2L AA Outdoorsman Is An Impressive Led Flashlight - On The Trail, In The Garage, Or In A Jam There's no more helpless a feeling than being broken down at night on the side of the freeway ...

Posts from this author will be added to your daily email digest and your homepage feed. is a former senior reviewer who worked at The Verge from 2011 until May 2025. His coverage areas included audio, ...

Yes, headlamps are many people’s go-to lighting solution. But the best flashlights offer more power and longer-lasting batteries and will shine wherever you want, not just where your head points. You ...

You may have heard that LED flashlights using AA lithium batteries run hotter and die sooner. Is there any truth to this? The short answer: There could be an issue ...