The Norsk 12.8V 15AH LiFePO4 Battery provides powerful, long-lasting energy in a lightweight, compact design, making it an ideal portable sonar battery for applications that don't require USB ports or a battery meter. Weighing just 3.3 lbs., this fish finder battery offers over 2000 life cycles, ensuring reliable performance for up to 10 years. Its small size (5.875 x 3.875 x 2.625 inches) makes it easy to install in tight spaces, and the included 3A 14.2V charger ensures optimal charging. With its Lithium Iron Phosphate (LiFePO4) chemistry, this battery delivers superior power with a high power-to-weight ratio compared to standard SLA batteries. Portable sonar/fish finder battery 2000+ life cycles with a lifespan of 5-10 years Lightweight at 3.3 lbs. 3A, 14.2V Standard Charger included (not compatible with 14.8V batteries) Specifications: Compact size: 5.875 x 3.875 x 2.625 in. Capacity: 15Ah Operating voltage 10v-14.4v It does not include USB ports or a battery meter It does not include Norsk Guardian or Bluetooth capabilities Manufacturer's 4 + 2 year non-prorated warranty