Specifications

The specifications. Power comes from a built-in solar cell, with one LR44 button battery. The battery lasts about three years, at one hour of use per day. The calculator works from $\displaystyle 0$ to $\displaystyle 40^{\circ}\text{C}$. It measures $\displaystyle 11.1 \times 77 \times 161.5\text{ mm}$, and it weighs about 95 grams with the battery.

▶ Watch this step in the video (54:34)