The 4000mAh Mega charge power Bank is lightweight and can charge your device anywhere, anytime. The Mega charge power Bank is Compatible with most USB mobile devices including smart phone, tablet, iPod, digital camera, hand-held game, PDA, MP3 and others. A Red LED power indicator light will light up during charging. The 4000mAh Mega charge power Bank gives 220% more battery life and up to 550 hours standby time. The Universal USB port can charge your favorite USB devices. A Red LED power indicator light will glow during charging.