Thanks for the quick reply, I am now definitely considering getting them. Only trouble is I can't have all my music in lossless... damn 16gb!
Almost all Li-ion battery from China is overrated for their capacity. So far, I am happy with the one from BXT. It said 2050mAH but but it is more like 1400mAH. Still better than the stock at least. Got another battery from Andida which is totally suck.