Energizer CR2450 3 Volts CR 2450 Lithium Computer Battery – House of Scuba
Amazon.com: EEMB CR 1/2 AA Series Lithium 3 V 900 mAh Cylindrical Battery CR14250BL 14250SE Non-Rechargeable for Scuba Diving Electronics Specialized Laboratory Equipment UL Certified (4 PCS) : Health & Household