Belkin Pocket Power Powerbank 15000mAh BlackStay charged anywhere with a high capacity power bank (aka portable charger) that fits easily into your bag. 15 000 mAh recharges a smartphone to provide 105 additional hours of video playback* placing the Pocket Power 15K ahead of its class as one of the most powerful portable batteries available. Two universal USB A ports deliver up to 3. 4A of total power to quickly and safely charge devices like smartphones smartwatches fitness bands headphones