Renogy Lithium Battery 12.8V 100A with Bluetooth. 2-in-1 12V 100Ah LiFePO4 battery with self-heating and Bluetooth. Double active protection system ensures maximum safety for your battery. Flame-retardant casing prevents vertical burning within 10. Boasting an IP67 rating and ISO 9227 corrosion resistance certification, it's perfect for fishing, boating, and other marine applications. Plus, the 100Ah Pro Series battery is equipped with Bluetooth for intuitive energy monitoring, and OTA updates to ensure your battery is always at its best.