Lenmar Replacement Battery for Texas Instruments TI-73 TI-85 TI-86 TI-89 TI-92 TI-92 Plus Replaces OEM Panasonic BR1620 Sony CR1616 Fits: Texas Instruments TI-73, TI-85, TI-86, TI-89, TI-92, TI-92 Plus Replaces: Panasonic BR1620, Sony CR1616 3V / 57mAh Lithium 30 Day Warranty Fits: Texas Instruments TI-73, TI-85, TI-86, TI-89, TI-92, TI-92 Plus 3V / 57mAh Lithium 30 Day Warranty Watch or calculator battery replacement Compatible with devices requiring a CR1616 battery 3 volt, 57 mAh lithium coin battery 1 per pack 30 day manufacturer's warranty