The Gemini 4 Cell Battery is the most versatile of the lineup. Offering the ability to mount to a helmet, headstrap, or to your bicycle, the 4 Cell Battery gives the ultimate in flexibility no matter where your adventure may take you. The rechargeable Lithium Ion Cells use a built in voltage regulator to ensure your battery functions safely under normal use. Gemini seals the 4 Cell Battery and circuitry inside a durable hard case that is completely weatherproof.
Mounts anywhere, including the head strap
Lightweight, versatile design
Li-Ion Samsung cells
The 4 Cell Gemini Battery can stretch to a jersey pocket or hydration bag with the use of the Gemini Extension Cable.
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