TTWEN LiFePO4 battery provides 4000+ cycles, which is more than 10 times Lead Acid with 200-500 cycles, helping to minimize replacement cost and reduce the total cost of ownership. Weighs only 1/3 the weight of lead-acid batteries, which makes it an easy choice for RVs, Marine, and Off-Grid Applications. Automotive Grade Lithium Battery & Eco-friendly. TTWEN 12V 200Ah batteries are manufactured by Automotive Grade LiFePO4 Cells with higher energy density, more stable performance, and greater power. With no acid in the battery, you're able to safely mount it in any position. LiFePO4 batteries can be recycled and do not produce elements that are harmful to the environment, but lead-acid batteries pollute the environment. TTWEN LiFePO4 battery can be connected in parallel and in series for larger capacity and voltage. Max connection in series: up to 4 identical batteries for up to 48V connecting in series. Connection in parallels: it can connect multiple batteries, suggesting no more than 4pcs in parallel. Allow being extended up to 4 in series and 4 in parallel (Max 4S4P) to get more capacity (Max 800Ah) and higher voltage (24V, 36V, 48V). When the batteries are used in parallel or series, the battery voltage and capacity must be the same and purchased in near time(within 3 months). Buy this and Save 49% OFF TTWEN 12V 200Ah LiFePO4 Lithium Battery Pack Now €461.99. With free shipping.