ACR Lithium Battery 1066
The ACR -1066 Lithium Battery Pack for GMDSS Survival Craft Radios by ACR is a user replaceable component.
Each lithium battery provides at least 8 hours of continuous radio operation, with longer possible duration in warm weather conditions. They have a 5-year replacement life and a 10 year useful life if left unused. It is recommended that additional battery packs be stored aboard survival crafts along with the VHF radio for extended operating life.