Great Pack low-temp series LiFePO4 battery is specifically designed for cold temperature charging. It can be charged at temperatures down to -30°C (-22°F)and discharge at ultra low temperature -50°C (-58°F). The Low-Temp Series LiFePO4 battery has the same size and performance as Standard Series LiFePO4 battery but can be safely charged when temperatures drop as low as -30°C(-22°F) using a standard charger. It is an ideal choice for use in RVs, off-grid solar, and in any application where charging in cold temperatures is necessary.