This way, you can have the additional charges for your phone or camera on the battery pack when you don’t want to pay for charging.
You can charge your items in the tea houses each day, however it can get expensive!  It will be worth your while to invest in a small battery pack for the trek.  This way, you can have the additional charges for your phone or camera on the battery pack when you don’t want to pay for charging.  We use a Ravpower bank 22000 mah/ 83.6 wh when we go on treks!