I've heard of some huge extended batteries, but is anyone really using them at this point? Dont you think they were too bulky to carry?
I am always try to keep my Note 4 minimum and would rather carry spare batteries.
You carry a Note 4 which has a huge battery already and large size and you think other people using extended batteries have phones that are too bulky? There are many people who think a Note 4 is too big as is.
Anyway, I use an extended battery on my Galaxy S3. I hate the short life of the regular battery. The extended battery doubled the thickness of the phone. I don't mind because I think phones are already too thin. The extra thickness served two additional purposes.
The first is that it provided clearance between the camera and the surface I place my phone on. It provides some better protection for the camera.
The second is that it provides clearance between the speaker and whatever surface it is resting against. I place my phone in a holster and normally the speaker is pressed up against the inside of the holster. This muffles the sound and makes it hard to hear my phone ring. With the clearance, the speaker is not muffled anymore and it is easier to hear when my phone rings or any other notification sound.