Checking out their web page, they have some "different" products. Is your light the SP-1002? If so, it strikes me as rather dim (max 8 lumens)and a bit heavy (6.5 oz). The manual implies that the unit might be a bit finicky (crank for a minute once a month for max battery life).

My preference for wilderness use is a headlamp powered by AA (primary lithium or NiMH rechargeables) with variable lumen output,the most useful of which is usually around 80-100 lunens). Used sparingly, such a light will last for days and fresh batteries are easily carried.

But this is opinion, not experience. Use your light and let us know how it works....