Setup, Compatibility & Care
To begin using the calculator, ensure the battery pull-tab has been removed from the back compartment if present. The unit uses a single LR1130 battery, which is fully compatible with the GP 189 standard. To maintain the device, keep it away from extreme heat or moisture, which can damage the liquid crystal display. If the display begins to dim, replace the battery by sliding off the cover on the underside. Clean the surface with a dry, soft cloth, avoiding harsh solvents or water, which could penetrate the key gaps and damage the internal circuit board.