The quality of batteries can be nothing to be desired, the nominal capacity of 1900mAh was exceeded by all 8 pieces at least 90mAh, the scattering is less than 5%. When you load I could not notice any problems to 800mA, the heat generation is not higher than comparable batteries. The age of the cells was in the delivery, according imprint 9 months, the subpoena was still at about 80% of the rated capacity, due to the higher actual capacity is not quite in line with expectations on the low self-discharge, yet is still in the green zone.