The Coast Slayer checks off one of my first criteria ... That’s about the same as 3 AA batteries, which seems like an appropriate comparison. Which leads to the battery, a ZITHION power cell.

Coast focuses on LED lights for professionals ... I also looked at whether the flashlight used common batteries (i.e., AA or AAA) that are easy to replace or if it used a popular charging cord ...

Turn a simple AA battery into a powerful mini flashlight with this easy DIY project. Learn how to assemble the components and create a compact yet high-power light source perfect for everyday use ...

We thought so. Listen up: We tested 15 AA batteries—the type typically used in digital cameras, flashlights, toys, radios, and remote controls—and found differences in performance and cost.