• Rechargeable AA batteries with integrated USB-C port for direct charging without external chargers. • Capacity of 1700 mAh per unit. • Supports up to 800 charging cycles for a long lifespan. • Fast charging time of approximately 2 hours. • LED charging status indicator that shows when the batteries are ready. • Includes 4-in-1 USB-A to USB-C cable to charge the four batteries simultaneously. • Integrated short-circuit protection.