I love the principle of having two backup batteries and an external charger. By cons after 15 days of one of 2 batteries no longer holding the load. As he left me one, I stored the first in a drawer because I thought it possible that a battery is defective. Until recent days the second brought me satisfaction with prolonged consequently the life of my s2 compared to my old original battery. But then, in recent weeks, charging takes less and less every day, and I will soon find myself without feeding my laptop, only 8 months after the first use of the battery (while the original took well over 2 and 1/2 years to have the same symptoms). Too bad. Finally after the hope of finding my S2 with all its power, I am disappointed ... I do not put 1 star because I think the product is good quality other than the batteries. So 2 stars.
26-06-2014 Correction: Anker and customer service and quality is very serious and responsive. Battery replacement date. Congratulations. I put the shots 4 stars.
