Don't fuss with charging your charger every time you need to go out...just leave this power bank by the window, on your bag or any place the sun can reach it so it's charged and ready to go when you need it. 5-line solar panel. Anti-shock. Water-resistant. UL standard. 2USB output 5V/2.1A (max), micro input 5V/2A, 8000mAh. MSRP $54.95