【Fits Group 31 Size Battery Box】 KEPWORTH new Upgraded 12V 135Ah LiFePO4 Battery was built based on the most ubiquitous size of the BCI battery s ize standard "Group 31", allowing it to function effectively in a variety of vehicles and applications. It is also 1/3 lighter than a Group31 AGM battery, has an 8X MED (Mass Energy Density), and produces 100% energy (1280Wh). (At 1C discharging rate, the AGM Group31 battery's standard at 60% DOD is just 504Wh usable energy output.) 【Monitoring Single Battery & System 】The latest Smart BMS function of KEPWORTH can monitor the information of the battery, can check the battery status, battery cells information, battery power information. This makes our LiFePO4 batteries ideal for solar homes, RVs, campers, trolling motors and off-grid applications. 【Smart 100A BMS & Low-Temp Protection】KEPWORTH 12V 135Ah Group 24 Smart LiFePO4 Lithium Battery is built-in upgraded smart BMS, allows you to monitor the battery information in real time through APP. Moreover, the smart BMS can prevent the battery from over-charging, over-discharging, over-current and short-circuit, and upgraded low-temperature cut-off function ensures safe use in low temperature and any environment. 【Automotive Grade Lithium Iron Phosphate Battery】KEPWORTH 12V 135Ah Group 31 Smart LiFePO4 Lithium Battery is manufactured with automotive grade lithium iron phosphate cells, which offers higher energy density, more stable performance and more power, thus superior quality. Note: Please do not use this battery as a car battery, starting battery, or golf cart battery. 【1.728kWh, Extendable】12.8V 135Ah lithium battery is no limited in parallel connection only. can be used in a variety of appliances. It is not restricted to RV batteries, but also works well in home backup systems and off-grid living. off grid life application solar panel bluetooth