How do I replace the battery in my CATIGA DK220 Desktop Calculator?

[BarrettMarie]

If your CATIGA DK220 Desktop 12 Digit Calculator's display is dim, a battery replacement is likely needed. Here's how to change it: First, loosen the screw(s) on the back cover of the calculator and carefully remove the cover. Next, use a small tool, like a screwdriver, to gently push the old battery out. Pay attention to the direction the battery exits to avoid circuit damage. Insert a new 1.5V battery into the compartment, ensuring the positive (+) side faces up. Finally, replace the back cover and tighten the screw(s), but don't overtighten them. Remember, a new battery is recommended for optimal calculator performance, and you can also use solar power if available.