The New SteriPEN Solar Charging Case is made for Adventurer and Traveler charges 2 CR123 Rechargeable batteries. With its 110V/240V power adaptor, it can charge off any power source. And if power isn_t available, its integrated solar panel will recharge 2 batteries in 2-4 days depending on solar conditions. The case ships with rechargeable 2 Rechargeable CR123 batteries carry pouch, and user_s guide.