7 - 9 months based on regular use.
These button cells are provided in packs of 4. 2 replacement button cells are needed per Tag.
This is a popular silver-oxide cell tested to provide the best life for your Mini Homing Tags and Panic Tags. Also commonly used in watches and hearing aids.
Alternatives : SR1130SW, 390, D390, 390, V390, 534, 390, 603, SB-AU, 280-24, GP390, SR54, SR1130