AA Lithium Battery
- Directly replaces mercury 4RM1B battery
- Fits all ACR Firefly strobes
- USCG approved for 5-year replacement life
- Operational to -20° C (-4° F)
- Exceeds 8 hours continuous operational life
The West Advisor
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.