B1000 Expansion Battery | 1152Wh. Multifunctional Power Source. You can power your , laptops, smartphones,fans, lights, and more with specific outputs USB-C, 12V/10A cigarette lighter, and USB-A. As the companion battery pack to R1500 , B1000 has a capacity of 1152Wh,Compatible with R1500 for a maximum of 4,608Wh capacity (1*R1500+3*B1000) .enough to get you through a severe power outage. Power supply usage scenarios of B1000 and R1500 combination. Buy Now and Save $45 Off B1000 Expansion Battery for R1500. Just enter code: B1000NEWA at checkout.