This handy headlamp from Spro can easily be charged via a USB cable (included!) and can therefore be charged with, for example, a power bank. The headlamp has an integrated 1200mah Polymer lithium battery and can be recharged up to 300 times. The lamp has a strong light output of 150 lumens and in a low setting of 30 lumens it will last about 20 hours on 1 charge. The lamp can be set to white or red light. The soft and elastic headband is adjustable so you can adjust it exactly to the size of your head.