Photographer, I bought 24 of these batteries 25 November 2013. While the manufacturer announces that can be used upon receipt, I verify the charges and on 24, I see between 0.2 and 0.4 volts voltage. So I have to put them in charge. And then, surprise. With Saitek charger bought from the shop Chasseur d'Images, the batteries become very hot and some have their coating swells and bursts !!! In use, I find that it does not hold more than a week load and every time I use them I have to recharge them. I bought them just because the manufacturer announcement, once again, that these batteries hold a charge 1 year !!! And your sister !!! I am disappointed and these cells do not make me use what I expected of them. So, besides false advertising, these batteries are of poor quality.
