During the lodge/teahouse trekking, there will be more chances to charge the battery. We recommend you bring an extra pair for in case. Remember to bring your adapters! An extra battery will be recommended. Nepal Trek Adventure and Expedition has brought this spectacular offer considering the ones with time bounds. The people with more plans in Nepal can also enjoy this trek so that, they can invest spare time on another voyage. Many other trekking companies are also providing the same package but we stand out among others because of our trekking cost, itinerary, and 10 years of experience. You can directly contact us for any kind of inquiries, and trekking related communication.