cell

Hey, So I bought a new 4s Lipo by Tattu, and I've got batteries from them before. But as you can guess from the title it arrived with a dead cell. The drone still flew but at a low power obviously. I didn't realise until I went to charge it that one cell was at 0v. Does anyone know how to...

Hey Guys, New to the forum, but have been a long time Flitetest viewer. Ive recently got into the hobby and am itching to learn! One of the things I am REALLY wanting to understand is Batteries... What do all the numbers and varieties mean... Anyone willing to explain it to me...