10-year Life & 6000+ CyclesCloudenergy 300Ah LiFePO4 Battery contains 6000+ deep cycles each lithium battery can run for more than 10 years which is 3 times longer cycles than other AGM batteries on the market.Grade A LiFePO4 CellsHighest-level safety based on UL Testing Certificate for the cell inside the battery with higher energy density more stable performance & greater power.Built-in 100A BMSProtect from overcharge over-discharge overcurrent and short circuits with an excellent self-discharge rate.Wide ApplicationThe 300Ah LiFePO4 battery has 3840Wh energy and 1280W max load perfect for trolling motors RVs campers marine travel trailers solar power systems motor homes UPS off-grid etc.Support in Series/ParallelOur LiFePO4 batteries can be connected in parallel and in series for larger capacity and higher voltage. We suggest that the Max connection in series is: 4pcs batteries to 48V and the Max connection in parallels is: it can connect multiple batteries and no more than 10 pcs in parallel. Products of different manufacturers cannot be connected in series or in parallel. When the batteries are used in parallel or series the voltage must be the same.Durable Iron ShellMade with high-quality ABS plastic this 12V 300Ah LiFePO4 battery pack is durable and long-lasting and has a wide range of operating temperatures. IP63 level waterproof sets you free from worrying to install indoors or outdoors.