Good Battery

[2RIR]

Hi everyone, could anyone tell me what lipo battery to get. I got a nuprol 11.1v for my weapon and only after 2 charges the 1st cell stays blinking red and green while charging, the other 2 charged perfect, its definitely not the charger as it charged the other batteries just fine, any feedback would be appreciated if its even safe to run a battery with a faulty cell, I will get a new one its just for a back up. Just for info there's no swelling of the battery but unfortunately I don't have a meter to test it, is there a charger that can do it all. Thanks look forward to hearing from you.