1) Size 6LR61, alkaline (Zn-MnO2) battery 2) Nominal voltage: 9V 3) No Mercury Added 4) Dimensions: 26.5 (L) x 17.5 (W) x 48.5 (H) mm 5) Metal Jacket 6) Shelf life: 3 years 7) OEM Welcomed Test Condition Cut-Off Duration 180Ω 24h/d 4.8v 900min 270Ω 1h/d 5.4v 12h 620Ω 2h/d 5.4v 33h