All flashlights might appear to be pretty similar — in fact, they might even seem identical upon first glance. After all, every flashlight delivers bright light in one direction, illuminating dark or dim areas. But some flashlights are better than others, both when it comes to their beams of light and their capabilities. If you’re looking for a reliable, long-lasting flashlight that can shine bright light without any issues, a 21700 flashlight might be the perfect pick for your needs. A 21700 flashlight is a flashlight that runs on a 21700 lithium-ion battery. These flashlights come in many different sizes, shapes, and styles from rechargeable to LED to super bright to long-lasting. If you’re considering purchasing a 21700 flashlight, you’ll want to make sure to check out the following top options.