1 x Maxell Maxell 364 battery Type: Silver Oxide 0% Mercury Dimensions (mm): 6.8 x 2.1 Voltage: 1.55V Nom. Capacity: 19 EQUIVALENT battery: Energizer 364, E. Not the same as SR621SW batteries - beware. Reviewed in Canada on 23 June 2020 Verified Purchase I'm sure the quality of the battery is fine but beware the thickness of the battery. A true SR621SW is 2.1mm thick, these are about 2.6mm so they will not fit in some slender cases or in some watch mechanisms. They would not fit my Diesel Big Daddy 2.0. Energizer SR621SW watch battery. In stock and ships out within 24 hours. Available as a single battery or wholesale lots. 10 year shelf life. Buy in bulk and save! Diameter: 6.8mm Height: 2.1mm Voltage: 1.55V Capacity: 23mAh. Operating Temperature: -10℃ to 60℃. "/>Sr621sw battery equivalent