But that 20% that makes all the difference will only make a difference when the phone is new. Otherwise the opposite is true. Refraining to charge fully makes

But that 20% that makes all the difference will only make a difference when the phone is new. Otherwise the opposite is true. Refraining to charge fully makes all the difference and saves you from a tough spot. Which in turn is why (was a bigger problem before) the sentiment that it doesn't matter how good/bad battery life I have as long as it lasts me a day. Well, if you do a complete cycle every day a year old phone will not last a day anymore...