Frequently Asked Questions
The SR621W is compatible with watches and small instruments that require a 1.55V silver oxide button cell in the 363/V364/SR621W size format. It cross-references with numerous manufacturer part numbers including V363, V364, V364 HC, 531, 364, 1175SO, D364, SP364, GP64, SR624SW, SR621SW, and SB-AG.
Silver oxide chemistry provides a stable voltage curve and low self-discharge rate, typically delivering 2 to 5 years of shelf life depending on storage conditions and device usage. Actual runtime varies with the power consumption of the specific device.
The Maxell SR621W operates at 1.55V and uses a zinc silver oxide chemical system, which is a standard chemistry for watch and precision instrument batteries known for its stable output and leak resistance.
The package contains 10 Maxell SR621W button cell batteries in a blister pack format, ready for immediate use or storage.
Used batteries should be recycled in accordance with local battery disposal regulations. Do not throw them in household waste. Many retailers and municipal collection points accept used button cell batteries for proper recycling.
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