“After three years of flying these with 90mm edfs and a 700 class heli (not overpowered) I had one go bad. My #4 cell went from internal resistance of 3 to 30+. It now won't charge or discharge correctly and I don't trust it at all. I have another battery which has one cell with double the IR as the rest and I would guess it won't last through all of 2017.Not sure if I will stick with these or kick out some more money for a higher end battery. Not saying these are bad I have used these for three years with 0 crashes.”
“Upon receiving the first admiral 4500 6s 40c lipo one cell was dead and without hesitation they sent me a new one. Fantastic service this is why they are who they are today. They keep things in motion :D thanks guys.”
“I use this battery in an FMA 1700mm Mustang and it does fine. I get 5-6 minute flights with reserve. Just be sure to store it at a 50% charge or it will not last (as with any LiPo).”