I personally own a Phantom v1.1.1 and I have 5 stock batteries for it (2200mAh). I've noticed that some of the batteries that I've used more deliver shorter flight times which is logical What are the noticeable signs besides battery swelling that it should be replaced? I surely wouldnt want to crash my Phantom due to a battery that is in the end of its life-cycle. Few questions -Does all batteries swell up in the end of their life-cycle or can battery be worn out but not swelled up. -Signs of battery that its closing to its end of the life-cycle -What happens if you have battery that is not swelled up but you keep on flying with it and its dying out (will it only have a short flight time or is there a possibility of a battery failure causing the Phantom to drop out from the sky).