I wouldn't worry too much because, the amount of time it will take to damage the battery will be significantly longer than you will have the phone. My Droid RAZR got uncomfortable to hold when I used it for a long time, and it is still functional today over a year and a half later. I have seen my Droid Maxx get up to 112F max on the Ghost charger, but I'm not worried. It had to build up to that and it started coming down right after that. The battery lasts a long time and even if the battery loses some of its ability to hold a charge it won't matter. It will still last all day. In two years or less, I'll have another phone. If I was planning on having this phone for 3 years or longer I might think about it. Any quality battery should perform well for 2 years, even with marginally high temps. There are always exceptions, but I wouldn't worry about it. Just use the phone the way you want to and replace it when it is time.