Bests & Worsts Reviews from Amazon

I bought a pack of the black ones back in April 2016. I am very disappoint to report that 3 of my 16 pack have leaked in my Nikon Speedlight SB-700 flash. It almost ruined my brand new flash. Now I question whether to trust the other 13. I will be contacting Amazon to let them know about there faulty product. I also have the more expensive grey and they seem to work fine. Not sure if I just got a bad set.