Shorai LFM Battery LFM21L7-BS12The Shorai LFM series batteries feature the new Shorai Sentry BMS that prevents the batteries from being excessively discharged. The BMS monitors the battery voltage, and should it fall too low, the battery will disconnect the terminals to prevent excessive discharge that can damage the battery. Shorai LFM batteries contain Shorai proprietary eXtreme Rate Lithium Iron prismatic cells (chemistry LiFePO4). They contain no poisonous lead or acid and do