I wouldn't call 2800 mAh small, just smaller than the huge 3000 mAh batteries. 3000 is still really big and 2800 is still over 90% of the size. Battery life will always be more important than battery size. Example, iPhone 6s+. If LG gets better battery life with 2800 than others do with 3000 then 2800 is enough. If they don't, then it's a blunder, regardless of size or whether or not it is removable.