CR2 vs CR123 batteries: Their differences might surprise you! - BatteryTrend
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Amazon.com : Tenergy CR2 3V Lithium Battery Non-Rechargeable PTC Protected High Performance CR2 Batteries for Flashlight, Digital Cameras, Toys, Alarm Systems (Not for Arlo Camera) 10PCS : Digital Camera Batteries : Electronics
CR2 & CR123 Camera Batteries | Lithium Camera Batteries | General Lamps
Watson Dual Rapid Charger for 3V CR123A and CR2 ADC-3VCR123A B&H