Renata Non-Rechargeable Batteries Button cell 632296 - Renata 701097, The Renata Button cell CR 2450N is a lithium button cell battery with a voltage of 3 V and a capacity of 540 mAh. It is typically used in wristwatches and pocket calculators. Renata is known for producing reliable and long-lasting batteries for small electronic devices. Renata 701097 Button Cell Long-Life 3V 540mAh Lithium CR2450N