Solar Battery Charger with Sunlight Strength Meter and Built-in Light - Charges C, AA and AAA Batteries Width ratio measurement range: 1%

Width ratio measurement range: 1% to 99%

Self-contained vacuum pump

Product Dimensions (L x W x H): 197 x 203 x 21 MM

and many other hobby and craft projects

Convert angles from degrees to radians to grads

Solar Battery Charger with Sunlight Strength Meter and Built-in Light - Charges C, AA and AAA Batteries Width ratio measurement range: 1%Charges C, AA and AAA size batteries using the power of sunlight! Equipped with a meter that displays the strength of the sunlight, power output from the solar panel, and time it will take to fully charge the batteries Built in angle adjustable light that you can use at night for reading, finding lost items, bike or car repairs, or to locate your home's fuse box if there is a power failure Meter can register sun power up to 160mA and a blocking diode