This battery fits these products: Calculated Ind. Construction Master IV 4045, Construction Master Pro-Desktop, ElectriCalc Lt, ElectriCalc Pro, Frame Master II, GradeMatic 4000, Measure Master Classic, NautiCalc Plus, Qualifier Plus IIIFX--Desktop, Time Master II, Canon F-710, Casio FX-9750GPLUS, Garmin Nuvi 850<br><br>This battery replaces these OEM batteries: HP HP33S, Panasonic CR2032Seiko SBT15, Sony CR2032, Timex NA