Casio - FX-82MS. I bought it in high school, used it in University and now on my 4th year as a Professional Accountant. Haven't changed the battery once. : r/BuyItForLife
Casio FX-82MS Scientific Calculator fx82ms Black Second edition New In Box | Shopee Singapore
Can I use a CASIO FX 82B as a calculator in NSEJS? It is a non-programmable calculator. - Quora