But wait...ION batteries don't have a memory, so that shouldn't matter....
Unless the battery isn't ion type?
You can wipe battery stats in cwm and twrm under the wipe section with cache, dalvik cache and others, at least in cwm. twrm is a little different, but it's there too...somewhere. I can't remember where exactly. Is your brightness all the way up? Are you running cpu speed on the governor labelled performance at like 1.8ghz? is your wifi always scanning? Is your gps on? I don't know what you mean by battery saving settings. You can check what's affecting your battery by going to settings->about phone->battery use.