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Casio HS-8V Basic Calculator,Battery Backup, Easy-to-read Display, Big Display, Auto Power Off, Independent Memory, Non-stick Key - Battery/Solar Powered - 0.3" x 2.3" x 4" - Silver - kite+key, Rutgers Tech Store
How long to Casio calculator batteries live for? I swear I haven't changed the batteries and I've had it for three years - Quora
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