Clean used Quantum Turbo 3 strobe power pack with charger. Tested with a Nikon SB-900 and working. These are universal. You need a brand and model specific cord and it provides hours of power for flash. Cords are readily available online. Super quick recycling, can be used with motor drives. Small so you can keep it in your bag on your belt. Super sweet pro gear perfect for shooting weddings or action sports.