JA Chokingu Solar Calculator Hakkatte Chokingu (no battery) Although unused, the box has some light soiling due to long-term storage. There are no instructions. I believe Hakkatte Chokingu requires removing many screws, as shown in image 4, to insert batteries. (I have never opened it.) *Although unused, this is a long-term storage item from a private individual. Please refrain from purchasing if you are concerned about the condition. * Hakkatte Chokingu will be removed from its box and shipped compactly. (The box will also be folded and packed together.) Please refrain from purchasing if you are concerned.