The PENN Fathom™ Electric Lithium-Ion Battery is a direct replacement for OEM PENN Fathom electric batteries, delivering reliable and consistent power for your electric reels. Designed with high-capacity 5AH lithium-ion technology, this battery is perfect as a replacement or spare, ensuring you never run out of power during extended saltwater fishing, deep-sea trolling, or bottom fishing trips. Engineered for durability and performance, it withstands harsh marine environments, providing dependable energy for big game fishing targeting species like tuna, marlin, grouper, and more. Due to federal regulations surrounding lithium batteries, this item ships via ground service only, with air transport restricted to Alaska and Hawaii. Compact, efficient, and essential for serious anglers, this battery maximizes your PENN Fathom electric reel’s capabilities every time you hit the water.