# Tri Star 816MS

The Tri Star 816MS is an arithmetic calculator with 8 digits precision and algebraic logic. It has 10 functions, 28 keys, and a VFD (vacuum fluorescent) display. The power source is 1.5V mercury cell.
**Note:** Olympia 816MS

## Facts at a glance:

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

Type | Arithmetic |

Functions | 10 |

Keys | 28 |

Precision | 8 |

Logic | Algebraic |

Display type | VFD |

Length | 121mm |

Width | 75mm |

Thickness | 19mm |

Power Source | 1.5V mercury cell |

Year introduced | 1979 |

Year discontinued | 1979 |

## Replacements:

If you have a Tri Star 816MS that is no longer working, you can first try replacing the 1.5V mercury cell battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements: