The lifespan of LiFePO4 (lithium) batteries is 8 to 10 times longer than that of regular lead-acid batteries (2000~5000 cycles vs 300-500 cycles). The usable capacity also doubles compared to that of a lead-acid battery while the weight is 30% less thanks to its significantly higher energy density. Without any memory effect, the lithium battery can hold a charge better while not in use and will not lose capacity due to the previous discharge state. Built-In BMS & Convenience & Maintenance Free -This marine lithium deep cycle battery is designed to meet your high performance demands, featuring a robust Battery Management System (BMS) that safeguards against overcharge, over-discharge, over-current, and short circuits. Its excellent self-discharge rate ensures reliability over extended periods. Engineered with a built-in high temp cut-off to prevent charging over 122 °F (50 °C), this lithium ion deep cycle battery 12V offers enhanced safety compared to traditional lead acid batteries. The Group Size BCI 27 lithium-ion battery features dimensions of L- 12 x W- 6.81 x H- 7.87 inches and weighs 18.8 lbs, with a voltage of 12 and 70 Amp Hours. Its Chemistry is Lithium-Iron Phosphate (LiFePO4), offering Cold Cranking Amps (CCA) of 900. Lightweight and maintenance-free, it excels in both outdoor and indoor applications, providing long life and high CCA performance for marine and starting battery requirements. Dual Terminal Posts: Allows for easy and versatile connectivity, compatible with various marine setups without needing adapters. 5 Year Full Replacement Warranty Banshee Batteries Group 27M Marine, RV, Solar Application LiFePO4 Lithium Ion Battery a revolutionary choice for boating, sailing, fishing, RV adventures, and outdoor activities where dependable power is essential. This advanced lithium-ion battery sets a new standard with its super lightweight design, weighing just one-third of traditional batteries, yet offering three times the lifespan. Key features include a Cold Cranking Amps (CCA) rating of 900, ensuring reliable starts in any marine condition, along with built-in Dual Terminal Marine Posts for seamless connectivity. It's significantly lighter, weighing 60% less than AGM or lead batteries, and boasts an Extended Life Cycle that outlasts AGM or SLA batteries by threefold. Additional standout features include a robust High Power Battery Management System (BMS) that safeguards against overcharging, deep discharges, and short circuits, promoting both safety and longevity. Patent Pending Dual Marine Posts made from high-quality copper enhance starting power, while its compact 18.8 lb build makes it easy to transport with a convenient carrying handle. Enjoy superior cranking power, up to 70% more than competitors, and benefit from an Extended Cycle Life that ensures lasting performance over time. The battery's completely sealed design allows installation in any position without risk of leakage, while its Low Self Discharge capability maintains power during extended storage periods. Plus, it's environmentally friendly, being free from toxins, acids, and lead, aligning with green energy standards. Experience unparalleled performance and durability with the Banshee Batteries Group 27M Marine, RV, Solar Application LiFePO4 Lithium Ion Battery—a must-have for those seeking reliable power solutions in marine and outdoor environments.