The Naztech extends your talk' music' and gaming experiences by up to 13 hours at home or on the go! This high-capacity 4'000 mAh battery can charge 2 devices at once through powerful dual outputs- a USB-C in/output and a USB output with up to 15 watts of pure power. With rapid recharge' get back to full in just 2 hours' so your devices stay powered up! Revolutionize your charging routine indoors and on the go!