With the rapid development of mobile Internet, smart phones and tablet PCs, as everyone's mobile carrier, became more and more popular. However, the battery life is still a major obstacle to enjoy mobile internet funs, especially for businessmen or travelers, this is called “charging Po”, portable power bank emerged and quickly accepted by people all of ages. However, what's the best capacity for portable charger buyer? Bigger is better? Actually, not. Generally speaking, more than 80% of consumers only recharge their smart phone 1 time while enthusiasts 3 times or so a day, and the rest can completely do at home or the office, so the 7000-10000 mAh capacity may is the most appropriate, if you have both a smartphone and a tablet. And over 10000 mAh capaity is often used for the laptop. On the other hand, theportable chargeris not as high as possible, often the higher the capacity, the heavier to carry, the longer to restore itself, and much higher risky for control its internal stability due to poor quality and technics of the battery. That's whyKinkoo Infinite Oneportable charger uses the best A+ Quality Lithium Polymer battery inside and contains real 8000 mAh capacity, but has the faster charging speed, 15 months warranty and over 500 cycles of charging and discharging.