https://www.pytesess.com/industry/Why-is-my-camper-battery-always-dead.html https://www.pytesess.com/RV-Battery/E-Box-12100.html E-Box-12100 With built-in intelligent self-heating, you can keep your battery charged in cold environment effortlessly. The 12V nominal voltage ensures more than 6000 life cycle, low heat generation and high efficiency during high power transmission. The modular design easily scales to meet a range of configurations-making it improve the average charging efficiency for your batteries in the long term. The state-of-the-art battery management system (BMS) enables comprehensive protection features and real-time monitoring.