# Tandy EC-4020

The Tandy EC-4020 is a programmable calculator with 10 digits precision and formula input logic. It has 95 functions, 44 keys, and an LCD (liquid crystal) display. The power source is 2xCR20323V cell.
**Note:** Radio Shack, Casio fx-4000P
A sample of this calculator is held in the calculator.org collection.

## Facts at a glance:

Feature | Value |
---|---|

Type | Programmable |

Functions | 95 |

Keys | 44 |

Precision | 10 |

Logic | Formula |

Display type | LCD |

Length | 131mm |

Width | 72mm |

Thickness | 11mm |

Weight | 75g |

Power Consumption | 0.008000W |

Power Source | 2xCR20323V cell |

Year introduced | 1985 |

Year discontinued | 1991 |

## Replacements:

If you have a Tandy EC-4020 that is no longer working, you can first try replacing the 2xCR20323V cell batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement: