^ I stand by what I said in my older posts about batteries, samsung is still best, in order of japan made, korea made, chinese made. Tied with samsung china comes extended batteries like kinps and mugen. There are two main factors that affect the battery impedance and SQ in new batteries, mAH capacity and chemical composition. The extended batteries like kinps and mugen have much better top and bottom extension and more neutral balanced frequency than stock, and even rival and sometimes better the samsung batteries in top bottom extension, depending on your luck, as I said its a lucky dip with batteries, one kinps battery can have up to 300mAH less than another, quality control is not very high in such batteries. The samsung batteries have higher quality chemical composition though, in the order I mentioned, japan, korea, china. They are more transparent, and have better detail and refinement. For example a kinps will better top bottom extension and more neutral frequency balance than a samsung china made, but the samsung china made will have better detail retreival, and blacker backround.