This is my 5th purchase from Litokala store and their batteries have always been of real capacity as stated. This last purchase took a very long time to arrive(was held by Canadian Customs for a long time before releasing the package) four months. Started charging batteries from 3.02volts. The Samsung 30Q finished with 3203mah. The liitokala 21700 battery got stopped charging at 4.13volts and the amount charged was 4497 mah which means that there was more room to achieve the 5000 mah capacity. LiitoKala sells very good batteries.