
Originally Posted by
dudemar
The Logan has decent throw for a small keychain light. The key points over the Eiger are brightness and longer runtime with a 17500, and with the cell adapters multiple cell options. I strongly recommend getting it in Al because it doesn't overheat quickly. Just keep in mind the heads on both lights are small so don't expect a ton of throw.
18650 cells are safe as long as you stick to a quality brand, use undamaged cells, recycle old cells, check voltage periodically and don't use cells with mismatched voltages. This is true for any battery chemistry or brand.