Here is the perfect rechargeable lithium battery for your outdoor energy needs. With a voltage of 12.8V, a capacity of 50A, and 640Wh, it provides reliable power for a variety of applications. Designed to withstand ambient temperatures ranging from -20 to +60°C, this battery is ready to tackle the elements, whether in freezing cold or scorching heat. Weighing only 14 pounds, it is lightweight and easy to transport on the go. Furthermore, it is fully recyclable, without lead or calcium that could contaminate the environment. With a limited 10-year warranty, you can rest assured knowing that this battery is designed to last and meet your energy needs for many years to come.