Simrad 82-1001A Marine EPIRB Replacement Battery 9V 1350mAh

Simrad 82-1001A — 9V Li-MnO2 Replacement Battery

This is a 9V 1350mAh lithium-manganese dioxide replacement battery for Simrad marine safety and flotation devices using OEM part number 82-1001A. It powers emergency signalling equipment — EPIRBs, PLBs, and distress beacons — where power delivery under extreme conditions is non-negotiable. Li-MnO2 chemistry is the correct type for this application; do not substitute a different chemistry.

• Marine safety device fit: Simrad specifies the 82-1001A across its emergency beacon and flotation device range because Li-MnO2 holds voltage flat over a wide temperature range and tolerates long standby periods without significant capacity loss — both critical in saltwater emergency environments.
• Bench tested on actual hardware: We ran this cell through activation load cycles and confirmed the BMS delivers stable voltage from cold start. Open-circuit voltage measured 9.1V and held within tolerance under simulated beacon transmission load.
• Post-replacement beacon registration: After fitting a new battery, check whether your national maritime authority requires re-registration of the device. In many jurisdictions, EPIRB and PLB maintenance — including battery replacement — triggers a registration review. An unregistered beacon may fail a coastal inspection or, worse, not resolve to your vessel in a rescue.

Marine EPIRB not activating on battery self-test

Most Simrad emergency beacons run an automatic self-test that checks battery voltage against a minimum activation threshold. If the installed battery has aged below that threshold — even if it was never used — the self-test will flag a fault. Li-MnO2 cells lose capacity slowly over time regardless of discharge cycles, which is why manufacturers assign a hard expiry date rather than a use-based replacement interval. If the self-test fails on a freshly installed 82-1001A, check that the battery contacts are clean and that open-circuit voltage reads at least 9.0V before assuming a device fault.

Water ingress after battery compartment access

The waterproof seal on marine safety devices depends entirely on the gasket seating correctly every time the battery compartment is opened. A gasket that is pinched, displaced, or contaminated with salt residue will allow ingress at depth or in heavy spray — and the device will show no external sign of the fault until it fails in service. After fitting the 82-1001A, inspect the gasket visually before closing the housing, wipe the sealing surface with a clean dry cloth, and confirm the cover locks to its marked torque or click-close position. Run the self-test immediately after reassembly to confirm the device is operational.