4 battery solar charger
this unit will charge four equivalent d c aa aaa sized batteries at any one time . it includes an adjustable stand to assist in positioning for the best angle toward the sun . can also be used indoors when placed in direct sunlight through a south-facing window . bright sunlight is not necessary for this unit to work properly but it obviously works faster when available . overcast days are fine but it increases the time necessary to recharge the batteries completely .