AA battery pack, which can be used with the Ferei head torches (AA and chargeable versions compatible). The waterproof box can hold 3x AA batteries for a fast swap during races. Also ideal for overnight or multi-night runs.
- Require 3x AA batteries (not included)
- Compatible with Ferei head torches
- Note can be used with Ferei HL40II but not fastened to head strap and only with extension cord
- Weight - 50g without battery