PRODUCT DESCRIPTIONS BRAND: MAXELL CHEMISTRY: LITHIUM SIZE: 2450 VOLTAGE:3V CAPACITY: The CR2450N battery is also a replacement for equivalent batteries: CR2450N, DL2450, ECR2450, BR2450, BR2450-1W, CR2450N, KCR2450, LM2450, 5029LC All batteries are by quality branded manufacturers, normally Renata, Varta, Rayovac or Panasonic. They are not the cheap makes you get on some websites. Size: 5.0mm x 24.0mm Voltage: 3v Type:- Lithium