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[DUAL POWER DESIGN] - This calculator utilizes both the solar power and battery power (battery included). [SENSITIVE AND BIG BUTTONS] - Your calculation process will be faster and smoother with this calculator’s responsive buttons.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.