EPIRB/PLB Battery Replacement ServiceFor:2774NH EPIRB Includes:1096NH 5-Year Lithium Battery, Parts, Labor, and Test Verification ReportACR EPIRB batteries should be replaced every 5 years to ensure proper functioning when needed. Turnaround time for EPIRB services averages three days from receipt when all components are in stock.Battery replacement service for PLBs includes a full physical integrity check, pressure test, data transmission test, replacement of seal and o-rings, installation of the new battery, and disposal of the old battery.