Sun Power solar cell polycrystalline photovoltaic DIY solar charger 0.5V 0.43W 52mm*52mm 25pcs/Lot $13.28 50pcs 10 Values 100Ω – 500KΩ 3296W Multiturn Trimmer Potentiometer Assorted KitRated 1.00 out of 501 $13.70