iPhone and HTC One are 2 of the most popular phones in the world... Neither have removable batteries...

Non-Removable batteries being anything that needs a tool to open the case to remove the battery. They come out but not without a fight

Unfortunately it is becoming more and more rare. The iPhone has never had a removable battery and each year, fewer and fewer of the big-name Android phones do either. Within a few years removable smartphone batteries will likely be a thing of the past.